![Page 1: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/1.jpg)
1
Copyright © 2003 General Motors Corporation. All Rights Reserved.
![Page 2: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/2.jpg)
2
Welcome toWelcome toWelcome toWelcome to
Allison LCT 1000Allison LCT 1000Automatic Transmission Automatic Transmission
Diagnostic Close-upDiagnostic Close-upCourse # 17340.13DCourse # 17340.13D
Allison LCT 1000Allison LCT 1000Automatic Transmission Automatic Transmission
Diagnostic Close-upDiagnostic Close-upCourse # 17340.13DCourse # 17340.13D
![Page 3: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/3.jpg)
3
The material contained in The material contained in this course component this course component
was accurate and current was accurate and current at the time of course at the time of course
development.development.
The material contained in The material contained in this course component this course component
was accurate and current was accurate and current at the time of course at the time of course
development.development.
![Page 4: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/4.jpg)
4
Web SiteWeb SiteWeb SiteWeb Site
www.gmcommontraining.comwww.gmcommontraining.comwww.gmcommontraining.comwww.gmcommontraining.com
![Page 5: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/5.jpg)
5
In which of the following regionsis your dealership located?
A. AtlantaB. ChicagoC. DallasD. Los AngelesE. New York
In which of the following regionsis your dealership located?
A. AtlantaB. ChicagoC. DallasD. Los AngelesE. New York
Question 1Question 1Question 1Question 1
![Page 6: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/6.jpg)
6
Question 2Question 2Question 2Question 2
Which of the following best Which of the following best describes your experience level at describes your experience level at GM dealerships? GM dealerships?
A. Greater than 10 years A. Greater than 10 years
B. Between 5-10 years B. Between 5-10 years
C. Between 2-5 years C. Between 2-5 years
D. Less than 2 years D. Less than 2 years
Which of the following best Which of the following best describes your experience level at describes your experience level at GM dealerships? GM dealerships?
A. Greater than 10 years A. Greater than 10 years
B. Between 5-10 years B. Between 5-10 years
C. Between 2-5 years C. Between 2-5 years
D. Less than 2 years D. Less than 2 years
![Page 7: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/7.jpg)
7
Course Goal Course Goal Course Goal Course Goal
Apply concepts and procedures Apply concepts and procedures to diagnose an Allison LCT 1000 to diagnose an Allison LCT 1000 transmission. transmission.
Apply concepts and procedures Apply concepts and procedures to diagnose an Allison LCT 1000 to diagnose an Allison LCT 1000 transmission. transmission.
![Page 8: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/8.jpg)
8
Session ObjectivesSession ObjectivesSession ObjectivesSession Objectives Identify normal Allison LCT 1000Identify normal Allison LCT 1000
operational characteristics operational characteristics
Identify hydraulic and electronicIdentify hydraulic and electronic functions required for proper functions required for proper operation operation
Choose appropriate diagnosticChoose appropriate diagnostic strategy based upon observation strategy based upon observation of operating parameters of operating parameters
Identify normal Allison LCT 1000Identify normal Allison LCT 1000 operational characteristics operational characteristics
Identify hydraulic and electronicIdentify hydraulic and electronic functions required for proper functions required for proper operation operation
Choose appropriate diagnosticChoose appropriate diagnostic strategy based upon observation strategy based upon observation of operating parameters of operating parameters
![Page 9: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/9.jpg)
9
![Page 10: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/10.jpg)
10
Clutch Application Chart Clutch Application Chart Clutch Application Chart Clutch Application Chart
![Page 11: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/11.jpg)
11
MAIN
BIAS PRESSURE
SPRING FORCE
MAIN FILTER
OVERAGE
OVERDRIVE KNOCKDOWN (NOT USED)
MAINPUMP
MAINREGULATOR
VALVE
TOCONVERTERFLOW VALVE
FROMTCC SIGNAL
OVERAGEMAINPump IntakeTCC Signal
![Page 12: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/12.jpg)
12
![Page 13: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/13.jpg)
13
![Page 14: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/14.jpg)
14
![Page 15: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/15.jpg)
15
Question 3Question 3Question 3Question 3Which clutch is maintained by Which clutch is maintained by main pressure in steady state 4th main pressure in steady state 4th gear and 5th gear?gear and 5th gear? A. C1 A. C1
B. C2 B. C2
C. C3C. C3
D. C5D. C5
Which clutch is maintained by Which clutch is maintained by main pressure in steady state 4th main pressure in steady state 4th gear and 5th gear?gear and 5th gear? A. C1 A. C1
B. C2 B. C2
C. C3C. C3
D. C5D. C5
![Page 16: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/16.jpg)
16
![Page 17: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/17.jpg)
17
Class 2 Data Line Class 2 Data Line
PCM PCM TCM TCM
CLASS 2 CLASS 2
![Page 18: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/18.jpg)
18
![Page 19: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/19.jpg)
19
Factors Affecting Basic Factors Affecting Basic TCM Shift Control TCM Shift Control Factors Affecting Basic Factors Affecting Basic TCM Shift Control TCM Shift Control
Engine torque increasesEngine torque increases
Temperature changes Temperature changes
Engine torque increasesEngine torque increases
Temperature changes Temperature changes
![Page 20: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/20.jpg)
20
New/Reprogrammed TCM New/Reprogrammed TCM New/Reprogrammed TCM New/Reprogrammed TCM Adaptive values set to baseAdaptive values set to base
calibration calibration
Actual shift compared to anActual shift compared to an ideal shift ideal shift
TCM changes settings ofTCM changes settings of adaptive values closer to ideal adaptive values closer to ideal shift level shift level
Adaptive values set to baseAdaptive values set to base calibration calibration
Actual shift compared to anActual shift compared to an ideal shift ideal shift
TCM changes settings ofTCM changes settings of adaptive values closer to ideal adaptive values closer to ideal shift level shift level
![Page 21: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/21.jpg)
21
![Page 22: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/22.jpg)
22
![Page 23: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/23.jpg)
23
![Page 24: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/24.jpg)
24
QuestionQuestionQuestionQuestion
Can you provide an explanation Can you provide an explanation of the LCT 1000 shift adapt of the LCT 1000 shift adapt strategy?strategy?
Can you provide an explanation Can you provide an explanation of the LCT 1000 shift adapt of the LCT 1000 shift adapt strategy?strategy?
![Page 25: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/25.jpg)
25
![Page 26: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/26.jpg)
26
![Page 27: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/27.jpg)
27
InputsInputsInputsInputs Throttle angle via PCMThrottle angle via PCM
NSBU switch (PNP)NSBU switch (PNP)
Pressure Switch AssemblyPressure Switch Assembly (PSA) (PSA)
TFT sensor TFT sensor
Throttle angle via PCMThrottle angle via PCM
NSBU switch (PNP)NSBU switch (PNP)
Pressure Switch AssemblyPressure Switch Assembly (PSA) (PSA)
TFT sensor TFT sensor
![Page 28: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/28.jpg)
28
![Page 29: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/29.jpg)
29
Wiring HarnessWiring HarnessWiring HarnessWiring Harness
![Page 30: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/30.jpg)
30
![Page 31: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/31.jpg)
31
QuestionQuestionQuestionQuestion
Which clutch has failed in the Which clutch has failed in the LCT 1000 and what caused LCT 1000 and what caused the failure? the failure?
Which clutch has failed in the Which clutch has failed in the LCT 1000 and what caused LCT 1000 and what caused the failure? the failure?
![Page 32: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/32.jpg)
32
QuestionQuestionQuestionQuestion
What will the customer’s What will the customer’s concern be with a failed C3 concern be with a failed C3 clutch?clutch?
What will the customer’s What will the customer’s concern be with a failed C3 concern be with a failed C3 clutch?clutch?
![Page 33: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/33.jpg)
33
Clutch Application Chart Clutch Application Chart Clutch Application Chart Clutch Application Chart
![Page 34: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/34.jpg)
34
DTC P1720/P0746 DTC P1720/P0746 DTC P1720/P0746 DTC P1720/P0746
““A” Trim Solenoid (controlledA” Trim Solenoid (controlledclutch not engaged)clutch not engaged)
““A” Trim Solenoid (controlledA” Trim Solenoid (controlledclutch not engaged)clutch not engaged)
Incorrect on-coming gearIncorrect on-coming gear ratio ratio
Defaults back to previousDefaults back to previous range range
Incorrect on-coming gearIncorrect on-coming gear ratio ratio
Defaults back to previousDefaults back to previous range range
![Page 35: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/35.jpg)
35
![Page 36: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/36.jpg)
36
Clutch Circuit Leak Clutch Circuit Leak Clutch Circuit Leak Clutch Circuit Leak Clutch piston sealsClutch piston seals
Barrel component sealsBarrel component seals
Hydraulic passages in theHydraulic passages in the case and case components case and case components
Valve body and componentsValve body and components
Clutch piston sealsClutch piston seals
Barrel component sealsBarrel component seals
Hydraulic passages in theHydraulic passages in the case and case components case and case components
Valve body and componentsValve body and components
![Page 37: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/37.jpg)
37
Clutch Application Chart Clutch Application Chart Clutch Application Chart Clutch Application Chart
![Page 38: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/38.jpg)
38
QuestionQuestionQuestionQuestion
What is causing the C5 clutch What is causing the C5 clutch to slip?to slip?What is causing the C5 clutch What is causing the C5 clutch to slip?to slip?
![Page 39: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/39.jpg)
39
Hydraulic Default Test Hydraulic Default Test Hydraulic Default Test Hydraulic Default Test
Reverse: no gearReverse: no gear
33rdrd Gear: no gear Gear: no gear
Reverse: no gearReverse: no gear
33rdrd Gear: no gear Gear: no gear
![Page 40: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/40.jpg)
40
QuestionQuestionQuestionQuestion
Based on the results of the Based on the results of the hydraulic default test, what type hydraulic default test, what type of malfunction are we looking of malfunction are we looking for, and what should be our for, and what should be our next step?next step?
Based on the results of the Based on the results of the hydraulic default test, what type hydraulic default test, what type of malfunction are we looking of malfunction are we looking for, and what should be our for, and what should be our next step?next step?
![Page 41: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/41.jpg)
41
CausesCausesCausesCauses Massive leak in the mainMassive leak in the main
circuit circuit Pump damage: however, thisPump damage: however, this
will usually be accompanied by will usually be accompanied by noise noise
Something preventing theSomething preventing the pump from priming and pump from priming and pressurizing fluid pressurizing fluid
Massive leak in the mainMassive leak in the main circuit circuit
Pump damage: however, thisPump damage: however, this will usually be accompanied by will usually be accompanied by noise noise
Something preventing theSomething preventing the pump from priming and pump from priming and pressurizing fluid pressurizing fluid
![Page 42: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/42.jpg)
42
![Page 43: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/43.jpg)
43
![Page 44: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/44.jpg)
44
J46409
![Page 45: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/45.jpg)
45
![Page 46: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/46.jpg)
46
DTCs DTCs DTCs DTCs
TCM: P0748TCM: P0748 TCM: P0748TCM: P0748
![Page 47: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/47.jpg)
47
QuestionQuestionQuestionQuestion
What types of circuit faults are What types of circuit faults are we looking for with this DTC?we looking for with this DTC?What types of circuit faults are What types of circuit faults are we looking for with this DTC?we looking for with this DTC?
![Page 48: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/48.jpg)
48
““A” Trim Solenoid A” Trim Solenoid Commanded Commanded ““A” Trim Solenoid A” Trim Solenoid Commanded Commanded
0% Duty Cycle Displayed 0% Duty Cycle Displayed 0% Duty Cycle Displayed 0% Duty Cycle Displayed
![Page 49: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/49.jpg)
49
Temperature vs Resistance SolenoidSump
TemperatureSump
TemperatureSolenoid A, B
ResistanceSolenoid C, D, E
ResistanceSolenoid FResistance
C F ohms ohms ohms
0 32 4.5 20.0 9.5
20 68 5.5 22.0 10.5
40 104 6.5 24.5 11.5
80 176 7.5 27.0 12.5
120 248 8.5 29.5 13.5
© Copyright General Motors Corporation. All Rights Reserved
![Page 50: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/50.jpg)
50
Temperature vs Resistance Speed Sensor
Temperature TemperatureMinimumResistance Nominal Resistance
MaximumResistance
C F k ohms k ohms k ohms
-25 -13 1.93 2.14 2.36
0 32 2.16 2.40 2.64
25 77 2.34 2.60 2.86
50 122 2.61 2.90 3.20
75 167 2.84 3.16 3.47
100 212 3.07 3.41 3.75
125 257 3.30 3.67 4.03
150 302 3.48 3.87 4.26
© Copyright General Motors Corporation. All Rights Reserved.
![Page 51: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/51.jpg)
51
Test Results Test Results Test Results Test Results
TFT @ 60º C (140º F)TFT @ 60º C (140º F)
“ “A” Trim Solenoid = 7A” Trim Solenoid = 7
TFT @ 60º C (140º F)TFT @ 60º C (140º F)
“ “A” Trim Solenoid = 7A” Trim Solenoid = 7
![Page 52: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/52.jpg)
52
Question 4Question 4Question 4Question 4Using the resistance versus Using the resistance versus temperature chart and the results of temperature chart and the results of testing, what do the results indicate? testing, what do the results indicate?
A. A. High resistance in the circuit High resistance in the circuit B. B. Low resistance in the circuit Low resistance in the circuit C. The solenoid windings are openC. The solenoid windings are openD. The resistance is within D. The resistance is within
specificationsspecifications
Using the resistance versus Using the resistance versus temperature chart and the results of temperature chart and the results of testing, what do the results indicate? testing, what do the results indicate?
A. A. High resistance in the circuit High resistance in the circuit B. B. Low resistance in the circuit Low resistance in the circuit C. The solenoid windings are openC. The solenoid windings are openD. The resistance is within D. The resistance is within
specificationsspecifications
![Page 53: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/53.jpg)
53
QuestionQuestionQuestionQuestion
If the resistance was too high, If the resistance was too high, where would you check for the where would you check for the high resistance and what high resistance and what would you be looking for? would you be looking for?
If the resistance was too high, If the resistance was too high, where would you check for the where would you check for the high resistance and what high resistance and what would you be looking for? would you be looking for?
![Page 54: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/54.jpg)
54
![Page 55: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/55.jpg)
55
![Page 56: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/56.jpg)
56
Question 5Question 5Question 5Question 5If CKT 1786 was shorted to ground If CKT 1786 was shorted to ground what type of fault would you look what type of fault would you look for?for?
A. PCM DTC storedA. PCM DTC storedB. TCM DTC storedB. TCM DTC storedC. Inoperative PRNDLC. Inoperative PRNDL
D. Incorrect engine operationD. Incorrect engine operation
If CKT 1786 was shorted to ground If CKT 1786 was shorted to ground what type of fault would you look what type of fault would you look for?for?
A. PCM DTC storedA. PCM DTC storedB. TCM DTC storedB. TCM DTC storedC. Inoperative PRNDLC. Inoperative PRNDL
D. Incorrect engine operationD. Incorrect engine operation
![Page 57: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/57.jpg)
57
TCM
RANGE RANGE RANGE RANGEA B C P
![Page 58: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/58.jpg)
58
![Page 59: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/59.jpg)
59
Diagnostic ScenarioDiagnostic ScenarioDiagnostic ScenarioDiagnostic Scenario
Erratic shiftingErratic shifting
Sometimes the transmissionSometimes the transmission shifts to what seems to be an shifts to what seems to be an inappropriate gear inappropriate gear
Sometimes the transmissionSometimes the transmission shifts to neutral shifts to neutral
MIL on MIL on
Erratic shiftingErratic shifting
Sometimes the transmissionSometimes the transmission shifts to what seems to be an shifts to what seems to be an inappropriate gear inappropriate gear
Sometimes the transmissionSometimes the transmission shifts to neutral shifts to neutral
MIL on MIL on
![Page 60: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/60.jpg)
60
![Page 61: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/61.jpg)
61
DTC P1711 Diagnostics DTC P1711 Diagnostics DTC P1711 Diagnostics DTC P1711 Diagnostics
“ “E” Switch Circuit: OKE” Switch Circuit: OK
Valve Body Inspection: Not Valve Body Inspection: Not Yet, per updated Yet, per updated diagnosticsdiagnostics
“ “E” Switch Circuit: OKE” Switch Circuit: OK
Valve Body Inspection: Not Valve Body Inspection: Not Yet, per updated Yet, per updated diagnosticsdiagnostics
![Page 62: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/62.jpg)
62
![Page 63: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/63.jpg)
63
Question 6Question 6Question 6Question 6On a transmission that is On a transmission that is operating correctly, which operating correctly, which forward gear should be forward gear should be produced when the C1 produced when the C1 connector is removed? connector is removed?
A. 1st gear A. 1st gear B. 2nd gear B. 2nd gear C. 3rd gear C. 3rd gear D. 5th gear D. 5th gear
On a transmission that is On a transmission that is operating correctly, which operating correctly, which forward gear should be forward gear should be produced when the C1 produced when the C1 connector is removed? connector is removed?
A. 1st gear A. 1st gear B. 2nd gear B. 2nd gear C. 3rd gear C. 3rd gear D. 5th gear D. 5th gear
![Page 64: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/64.jpg)
64
![Page 65: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/65.jpg)
65
Session Summary Session Summary Session Summary Session Summary
Identify Allison LCT 1000 andIdentify Allison LCT 1000 and operational characteristics operational characteristics
Identify electronic controls andIdentify electronic controls and functions functions
Describe strategic diagnostic pathDescribe strategic diagnostic path to servicing Allison LCT 1000 to servicing Allison LCT 1000
Identify diagnostic proceduresIdentify diagnostic procedures and service procedures and service procedures
Identify Allison LCT 1000 andIdentify Allison LCT 1000 and operational characteristics operational characteristics
Identify electronic controls andIdentify electronic controls and functions functions
Describe strategic diagnostic pathDescribe strategic diagnostic path to servicing Allison LCT 1000 to servicing Allison LCT 1000
Identify diagnostic proceduresIdentify diagnostic procedures and service procedures and service procedures
![Page 66: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/66.jpg)
66
Post-test Question 1Post-test Question 1Post-test Question 1Post-test Question 1
Which of the following clutches is used to hold the P3 ring gear stationary?
A. C1B. C2C. C4D. C5
Which of the following clutches is used to hold the P3 ring gear stationary?
A. C1B. C2C. C4D. C5
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 67: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/67.jpg)
67
Post-test Question 2Post-test Question 2Post-test Question 2Post-test Question 2
Which clutch could be malfunctioning if a truck is missing 4th and 5th gear?
A. C1B. C2C. C4D. C5
Which clutch could be malfunctioning if a truck is missing 4th and 5th gear?
A. C1B. C2C. C4D. C5
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 68: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/68.jpg)
68
Post-test Question 3Post-test Question 3Post-test Question 3Post-test Question 3
When an Allison transmission is replaced, the TCM should be ______.
A. replacedB. reset to base calibrationsC. reprogrammed to the “slow” adaptsD. re-learned to the PCM
When an Allison transmission is replaced, the TCM should be ______.
A. replacedB. reset to base calibrationsC. reprogrammed to the “slow” adaptsD. re-learned to the PCM
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 69: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/69.jpg)
69
Post-test Question 4Post-test Question 4Post-test Question 4Post-test Question 4
“VCM/Trans” listed on the Tech 2 Message Monitor identifies _____.
A. the TCM has stopped communicating
B. the TCM has a DTCC. the PCM class 2 data line is openD. the TCM is operating correctly
“VCM/Trans” listed on the Tech 2 Message Monitor identifies _____.
A. the TCM has stopped communicating
B. the TCM has a DTCC. the PCM class 2 data line is openD. the TCM is operating correctly
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 70: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/70.jpg)
70
Post-test Question 5Post-test Question 5Post-test Question 5Post-test Question 5
What will the shift adapt display if the TCM is still making large adjustments for a particular shift?
A. SlowB. FastC. ConvergedD. It will flash
What will the shift adapt display if the TCM is still making large adjustments for a particular shift?
A. SlowB. FastC. ConvergedD. It will flash
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 71: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/71.jpg)
71
Post-test Question 6Post-test Question 6When removing the TCM C1 connector, the transmission should provide which hydraulic default gears?
A. 1st and 3rdB. Reverse and 5thC. 3rd and 5thD. Reverse and 3rd
When removing the TCM C1 connector, the transmission should provide which hydraulic default gears?
A. 1st and 3rdB. Reverse and 5thC. 3rd and 5thD. Reverse and 3rd
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 72: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/72.jpg)
72
Post-test Question 7Post-test Question 7During a clutch test, the pressure drops and stays low and the turbine speed sensor increases and stays high. What does this indicate?
A. A hydraulic leakB. An electrical faultC. A damaged statorD. Normal operation
During a clutch test, the pressure drops and stays low and the turbine speed sensor increases and stays high. What does this indicate?
A. A hydraulic leakB. An electrical faultC. A damaged statorD. Normal operation
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 73: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/73.jpg)
73
Post-test Question 8Post-test Question 8
If you suspect that an Allison transmission is leaking, you should _________.
A. replace the transmissionB. replace the cooler linesC. add UV dye and leak checkD. perform clutch test
If you suspect that an Allison transmission is leaking, you should _________.
A. replace the transmissionB. replace the cooler linesC. add UV dye and leak checkD. perform clutch test
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 74: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/74.jpg)
74
Post-test Question 9Post-test Question 9Which NSBU circuit fault could cause an 8.1L engine to not exceed 3000 RPM and cause harsh shifts?
A. CKT #1786 shorted to groundB. CKT #1786 openC. TCM power supply shorted to
groundD. TCM power supply open
Which NSBU circuit fault could cause an 8.1L engine to not exceed 3000 RPM and cause harsh shifts?
A. CKT #1786 shorted to groundB. CKT #1786 openC. TCM power supply shorted to
groundD. TCM power supply open
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 75: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/75.jpg)
75
Post-test Question 10Post-test Question 10During a clutch test, in certain ranges the pressure drops and returns to normal and the turbine speed sensor increases and stays high. What does this indicate?
A. A hydraulic leakB. An electrical faultC. A slipping clutchD. Normal operation
During a clutch test, in certain ranges the pressure drops and returns to normal and the turbine speed sensor increases and stays high. What does this indicate?
A. A hydraulic leakB. An electrical faultC. A slipping clutchD. Normal operation
606059595858575756565555545453535252515150504949484847474646454544444343424241414040393938383737363635353434333332323131303029292828272726262525242423232222212120201919181817171616151514141313121211111010 99 88 77 66 55 44 33 22 11 00
![Page 76: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/76.jpg)
76
Evaluation InstructionsEvaluation Instructions
Turn to evaluation module;Turn to evaluation module; remove and complete evaluation remove and complete evaluation
Use keypad to answer questionsUse keypad to answer questions
Turn to evaluation module;Turn to evaluation module; remove and complete evaluation remove and complete evaluation
Use keypad to answer questionsUse keypad to answer questions
Press the “Next Quest” keyPress the “Next Quest” key after each question after each question
Press “Yes” when completedPress “Yes” when completed
Press the “Next Quest” keyPress the “Next Quest” key after each question after each question
Press “Yes” when completedPress “Yes” when completed
![Page 77: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/77.jpg)
77
Evaluation Instructions cont.Evaluation Instructions cont.
Fill out back of evaluation formFill out back of evaluation form
Include today’s date, time and Include today’s date, time and time zone time zone
Fax to the Detroit IDL Center at Fax to the Detroit IDL Center at (586) 576-3319(586) 576-3319
Fill out back of evaluation formFill out back of evaluation form
Include today’s date, time and Include today’s date, time and time zone time zone
Fax to the Detroit IDL Center at Fax to the Detroit IDL Center at (586) 576-3319(586) 576-3319
Evaluation InstructionsEvaluation Instructions
![Page 78: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/78.jpg)
78
Thank you for attendingThank you for attendingThank you for attendingThank you for attending
Allison LCT 1000Allison LCT 1000Automatic Transmission Automatic Transmission
Diagnostic Close-upDiagnostic Close-upCourse # 17340.13DCourse # 17340.13D
Allison LCT 1000Allison LCT 1000Automatic Transmission Automatic Transmission
Diagnostic Close-upDiagnostic Close-upCourse # 17340.13DCourse # 17340.13D
![Page 79: 1 Copyright © 2003 General Motors Corporation. All Rights Reserved](https://reader035.vdocument.in/reader035/viewer/2022062500/5697bfe21a28abf838cb461c/html5/thumbnails/79.jpg)
79
Copyright © 2003 General Motors Corporation. All Rights Reserved.