1 Copyright © 2007 General Motors Corporation. All Rights Reserved.

2 Automatic Transmission/Transaxle Theory, Operation & Diagnostics Course # D2 Automatic Transmission/Transaxle Theory, Operation & Diagnostics Course # D2 Welcome to

3 The material contained in this course component was accurate and current at the time of course development

4 Web Site

5 Question 1 In which of the following regions is your dealership located? A.Atlanta B.Chicago C.Dallas D.Los Angeles E.New York A.Atlanta B.Chicago C.Dallas D.Los Angeles E.New York

6 Upon successful completion of this course, you will be able to apply concepts and procedures to properly diagnose and repair Automatic Transmission/Transaxle concerns. Course Goal

7 Describe the Shift Speed ChartDescribe the Shift Speed Chart Use the Shift Speed ChartUse the Shift Speed Chart Road TestRoad Test Describe the Shift Speed ChartDescribe the Shift Speed Chart Use the Shift Speed ChartUse the Shift Speed Chart Road TestRoad Test Session Objectives

8 Review diagnostic procedures for the 6T70/75Review diagnostic procedures for the 6T70/75 Identify electrical inputsIdentify electrical inputs Diagnose vehicle concernDiagnose vehicle concern Review diagnostic procedures for the 6T70/75Review diagnostic procedures for the 6T70/75 Identify electrical inputsIdentify electrical inputs Diagnose vehicle concernDiagnose vehicle concern Session Objectives cont.

9  Describe the Shift Speed Chart  Use the Shift Speed Chart  Diagnose Transmission/Engine Concern  Describe the Shift Speed Chart  Use the Shift Speed Chart  Diagnose Transmission/Engine Concern Module 2 Objectives

10  Proper engine operation  Road Test  Transmission Fluid Checking  Fuel System Pressure Check  Proper engine operation  Road Test  Transmission Fluid Checking  Fuel System Pressure Check Module 2 Topics

11 Diagnostic Scenario 1 Vehicle:2007 Saab 9-7x with 17,000 miles Customer Concern:Transmission does not shift properly

12 What action should be taken at this time? Question

13 How are we going to verify our customer’s concern? Question

14 What should be our next step after verifying the customer’s concern? Question

15 Fluid Check

16  Engine performing properly  Transmission fluid satisfactory  Tire pressure checked  Engine performing properly  Transmission fluid satisfactory  Tire pressure checked Part 1 Debrief

17  Electrical function check  Checked garage shifts  Setup scan tool  Electrical function check  Checked garage shifts  Setup scan tool Part 1 Debrief cont.

18 Question 2 How long should you pause between shifts when moving the gear selector through all its ranges during garage shifts? A.1 – 2 seconds B.2 – 3 seconds C.3 – 4 seconds D.No Pause A.1 – 2 seconds B.2 – 3 seconds C.3 – 4 seconds D.No Pause

19  Up-Shift Control & TCC Apply  Note Concerns  Up-Shift Control & TCC Apply  Note Concerns Part 2 Debrief

20 Question 3 What other piece of diagnostic information can help us in resolving our concern? A.Shift Speed Chart B.Pressure Test C.Service Fast Learn Adapts D.Clear Shift Adapts A.Shift Speed Chart B.Pressure Test C.Service Fast Learn Adapts D.Clear Shift Adapts

21 Tech 2

22 What operating parameters do you think we should plot or graph to aid us in diagnostics? Question

23 Vehicle SpeedVehicle Speed Throttle PositionThrottle Position Commanded GearCommanded Gear Engine SpeedEngine Speed Vehicle SpeedVehicle Speed Throttle PositionThrottle Position Commanded GearCommanded Gear Engine SpeedEngine Speed ParametersParameters

24 What, if anything, does this information tell us? Question

25 Just like before, what, if anything, does this information tell us? Question

26 Given the information from the scan tool, the Shift Speed Chart, and the Range Reference Chart, do we now have enough information to determine what the cause of our concern could be? Question

27  Diagnostic System Check – Vehicle  Checked Tire Pressures  Checked Transmission Fluid  Diagnostic System Check – Vehicle  Checked Tire Pressures  Checked Transmission Fluid ReviewReview

28  Completed Road Test  Reviewed Shift Speed Chart  Completed Road Test  Reviewed Shift Speed Chart Review cont.

29 Is there anything other than the transmission that could be causing the transmission to operate incorrectly and if so what? Question

30  Inspect PCM  Inspect vacuum hoses  Inspect air intake ducts  Inspect PCM  Inspect vacuum hoses  Inspect air intake ducts Inspections 1

31  Inspect for air leaks  Inspect wiring harness  Inspect sensors/components  Inspect for air leaks  Inspect wiring harness  Inspect sensors/components Inspections 2

32  Return-less, on-demand  Fuel Pressure Regulator  Correct fuel pressure  Return-less, on-demand  Fuel Pressure Regulator  Correct fuel pressure Fuel System

33  Electric, Turbine style fuel pump  Supplies high pressure fuel  Electric, Turbine style fuel pump  Supplies high pressure fuel Fuel System cont.

34  Ignition OFF  Accessories OFF  Install Pressure Gage  Ignition OFF  Accessories OFF  Install Pressure Gage Fuel System Diagnosis Step 3

35  Ignition ON/Engine OFF  Pump Relay ON  Observe Gage  Ignition ON/Engine OFF  Pump Relay ON  Observe Gage Fuel System Diagnosis Step 3 cont.

36 Fuel Pressure Reading

37 Correct Fuel Pressure Reading

38  Conducted Road Test  Described the Shift Speed Chart  Described the Range Reference Chart  Conducted Fuel System Pressure Check  Diagnosed a Transmission Concern  Conducted Road Test  Described the Shift Speed Chart  Described the Range Reference Chart  Conducted Fuel System Pressure Check  Diagnosed a Transmission Concern Module 2 Summary

39 Posttest Question 1 All factors EXCEPT _______ could affect proper transmission diagnosis during a road test. A.transmission temperature B.tire inflation C.electronic power steering D.fluid level A.transmission temperature B.tire inflation C.electronic power steering D.fluid level

40 Posttest Question 2 The final step in preparation for the road test is to ___________. A.disconnect the scan tool B.connect the scan tool C.disable Cruise Control D.setup the scan tool A.disconnect the scan tool B.connect the scan tool C.disable Cruise Control D.setup the scan tool

41 Posttest Question 3 You should pause _________between shifts when moving the gear selector through all its ranges during garage shifts. A.No Pause B.0 – 1 seconds C.1 – 2 seconds D.2 – 3 seconds A.No Pause B.0 – 1 seconds C.1 – 2 seconds D.2 – 3 seconds

42 Posttest Question 4 On most vehicle applications, the Torque Converter Clutch can be released _________. A.manually B.by applying & releasing the brake pedal C.by applying & releasing the parking brake D.by down-shifting to 3 rd gear A.manually B.by applying & releasing the brake pedal C.by applying & releasing the parking brake D.by down-shifting to 3 rd gear

43  Review the components of the 6T70/75  Review diagnostic procedures for the 6T70/75  Diagnose transmission concern associated with the 6T70/75  Review the components of the 6T70/75  Review diagnostic procedures for the 6T70/75  Diagnose transmission concern associated with the 6T70/75 Module 3 Objectives

44  On/Off Axis Transaxle  Primary Differences  Gearset  Torque Converter  Diagnostic scenario  On/Off Axis Transaxle  Primary Differences  Gearset  Torque Converter  Diagnostic scenario Module 3 Topics

45 Off Axis Transaxle

46 On Axis Transaxle

47  Torque  Gear set  Case  Torque  Gear set  Case 6T70 vs. 6T75

48 6T70/75 Gear set

49 Torque Converter

50 Question 4 Why are the helical gears in the 6T70/75 ground and honed to exact dimensions and tolerances? A.Minimize gear failures B.Minimize vibration C.Extend gear life D.Minimize gear wear A.Minimize gear failures B.Minimize vibration C.Extend gear life D.Minimize gear wear

51 Diagnostic Scenario 2 Vehicle:2007 GMC Acadia w/ 88 miles Customer Concern:MIL is illuminated

52 MIL in IPC

53 Scan Tool

54 IMPORTANT Do not clear any DTCs unless instructed to do so by a diagnostic procedure.

55 IMPORTANT If any DTCs are Powertrain related DTCs, select Capture Info to store the DTC information with the scan tool.

56  Sensor DTCs  Solenoid DTCs  Relay DTCs  Sensor DTCs  Solenoid DTCs  Relay DTCs Component Level DTCs

57  Misfire DTCs  Evap DTCs  Fuel Trim DTCs  Misfire DTCs  Evap DTCs  Fuel Trim DTCs System Level DTCs

58 DTC P0717 Freeze Frame

59 DTC P0717 Failure Record

60 System Verification

61 What, if anything, in the Failure Record Data would give us an indication as to what may be going on? Question

62 Failure Record Data 3

63  Ignition ON  Observe ISS/OSS Voltage  Should display OK  Ignition ON  Observe ISS/OSS Voltage  Should display OK Circuit/System Testing - 1

64 Failure Record Data 4

65  ISS  Harness  Connector  Control Solenoid (W/body & TCM)  Clutch Housings  ISS  Harness  Connector  Control Solenoid (W/body & TCM)  Clutch Housings Visually Inspect

66 J Test Kit

67 J Test Kit

68 J VariableSignalGeneratorJ VariableSignalGenerator

69 TCM Connector

70 Signal Generator Connected

71 Scan Tool & Signal Generator

72 Transmission ISS

73 Question 5 When using the J Variable Signal Generator to test the ISS, the Duty Cycle should be set at ________. A.20% B.40% C.50% D.80% A.20% B.40% C.50% D.80%

74  Disconnected negative battery cable  Removed retainer nuts  Removed oil cooler lines  Drained the transmission fluid  Removed cover  Disconnected negative battery cable  Removed retainer nuts  Removed oil cooler lines  Drained the transmission fluid  Removed cover ISS Replacement Prelim

75  Reviewed the components of the 6T70/75  Reviewed diagnostic procedures for the 6T70/75  Diagnosed transmission concern associated with the 6T70/75  Reviewed the components of the 6T70/75  Reviewed diagnostic procedures for the 6T70/75  Diagnosed transmission concern associated with the 6T70/75 Module 3 Summary

76 Posttest Question 5 Why is it important NOT to over- tighten the T-Handle – J Lift Assist Tool – when removing or installing the torque converter? A.It will damage the tool. B.It will break the lugs. C.It will dimple the cover. D.It will strip the threads. A.It will damage the tool. B.It will break the lugs. C.It will dimple the cover. D.It will strip the threads

77 Posttest Question 6 Which of the following is NOT a Component Level DTC? A.Relay B.Sensor C.Solenoid D.Misfire A.Relay B.Sensor C.Solenoid D.Misfire

78 Posttest Question 7 What special tool is needed to diagnose the ISS and the OSS? A.DMM B.Oscilloscope C.Signal generator D.Self-power test lamp A.DMM B.Oscilloscope C.Signal generator D.Self-power test lamp

79  Identify electrical inputs  Identify potential DTCs  Review diagnostic procedures  Diagnose vehicle concern  Identify electrical inputs  Identify potential DTCs  Review diagnostic procedures  Diagnose vehicle concern Module 4 Objectives

80  Review Range Reference Chart  Review and complete Diagnostic System Check – Vehicle  Review inputs  Review Circuit/System Testing  Review Range Reference Chart  Review and complete Diagnostic System Check – Vehicle  Review inputs  Review Circuit/System Testing Module 4 Topics

81  1 – 2 – 3 - = ____  4 – 5 – 6 - = ____  1 – 2 – 3 - = ____  4 – 5 – 6 - = ____ Electrical Default Protection Modes 3rd 5th

82  Vehicle Speed  Transmission range  Component  Vehicle Speed  Transmission range  Component Mechanical Default Protection Modes

83  Control shift points  Control TCC application and release  Control line pressure  Control shift points  Control TCC application and release  Control line pressure Electrical Inputs

84 Control Solenoid

85 Control Solenoid Expanded View

86 16 Pin Connector

87 Control Solenoids

88 TFP Switches

89  TFP 1 = 3 – 5 and Reverse = _____  TFP 3 = 2 – 6 = _____  TFP 4 = = _____  TFP 5 = CBR1 / 4-5-6= _____  TFP 1 = 3 – 5 and Reverse = _____  TFP 3 = 2 – 6 = _____  TFP 4 = = _____  TFP 5 = CBR1 / 4-5-6= _____ Fluid Pressure Switch Operation Sol 2 Sol 4 Sol 5 Sol 3

90 TFT Sensor

91 Question 6 For any mechanical failure within a shift solenoid or pressure control solenoid, the transmission will default to the optimum gear to allow safe operation depending on three factors. Which answer does NOT go with the others? A.Transmission Range B.Vehicle Speed C.Transmission Fluid Temperature D.Component stuck A.Transmission Range B.Vehicle Speed C.Transmission Fluid Temperature D.Component stuck

92  Vehicle Speed  Transmission range  Component stuck  Vehicle Speed  Transmission range  Component stuck Mechanical Default Protection Modes

93 Diagnostic Scenario 3 Vehicle:2007 Chevrolet Corvette w/8,000 miles Customer Concern:MIL is illuminated

94  Customer concern verified  NO history  6L80 equipped  Customer concern verified  NO history  6L80 equipped KnownsKnowns

95 Scan Tool

96 Ignition ON / Engine OFF Mode

97 Do not clear any DTCs unless instructed to do so by a diagnostic procedure. ImportantImportant

98 If any DTCs are Powertrain related DTCs, select Capture Info in order to store the DTC information with the scan tool. ImportantImportant

99 Transmission Fluid Pan

100  Monitor TFT  Start/Idle  Depress brake/shift gears  Monitor TFT  Start/Idle  Depress brake/shift gears Trans Fluid Check

101  PARK  Idle 1 minute  Raise vehicle  PARK  Idle 1 minute  Raise vehicle Trans Fluid Check cont.

102 Transmission Fluid Temperature

103 Fluid Level Check Plug

104 Pressure Gage

105  Connect scan tool  Start engine  Check fluid level  Connect scan tool  Start engine  Check fluid level Line Pressure Check

106  Inspect for stored DTC’s  Inspect Manual Linkage  Turn OFF  Inspect for stored DTC’s  Inspect Manual Linkage  Turn OFF Line Pressure Check cont.

107 Line Pressure Test Hole Plug

108  Access scan tool controls  Start the engine  Access scan tool controls  Start the engine Line Pressure Check cont.

109 Line Pressure Check cont.

110  Pressure Variance  Turn engine OFF  Remove J  Re-install plug  Pressure Variance  Turn engine OFF  Remove J  Re-install plug Line Pressure Check cont.

111  Procedure resides in TCM  Activated by scan tool  Procedure resides in TCM  Activated by scan tool Control Solenoid Valve Cleaning

112  Operate transmission to temp  Select Service Cleaning  Engine OFF for 30 seconds  May take 10 minutes  Operate transmission to temp  Select Service Cleaning  Engine OFF for 30 seconds  May take 10 minutes Control Solenoid Valve Cleaning cont.

113 Control Solenoid Valve

114 DT Control Solenoid Test Plate

115  TCM cycles solenoids ON and OFF  Normal function  Pressure gage will jump  TCM cycles solenoids ON and OFF  Normal function  Pressure gage will jump Valve Solenoid Test

116  Align & Install Electrical connector  Clean part and tool as required  Bolt test plate to control solenoid (w/body and TCM) valve assembly mounting surface  Align & Install Electrical connector  Clean part and tool as required  Bolt test plate to control solenoid (w/body and TCM) valve assembly mounting surface Run the Test

117  Connect the test harness  Connect shop air  Command solenoid ON and OFF  Connect the test harness  Connect shop air  Command solenoid ON and OFF Run the Test cont.

118  Read test results  Connect solenoid valve ON and OFF  Release air between tests  Read test results  Connect solenoid valve ON and OFF  Release air between tests Run the Test cont.

119  6 Speed Auto Trans procedure  Clutch Data learned  Scan Tool initiation  6 Speed Auto Trans procedure  Clutch Data learned  Scan Tool initiation Service Fast Learn Adapts

120  Block Drive Wheels  Apply Parking Brake  Apply Service Brake  Block Drive Wheels  Apply Parking Brake  Apply Service Brake Prep for Faster Learn Adapts Procedure #1

121  0 % Throttle  TFT º C or º F  Cycle gear selector  0 % Throttle  TFT º C or º F  Cycle gear selector Prep for Faster Learn Adapts Procedure #2

122 Powertrain Screen

123 Special Functions Screen

124 Transmission Control Module Screen

125  Automatically initiated  Scan tool provides instructions  Follow instructions as required  Automatically initiated  Scan tool provides instructions  Follow instructions as required Fast Learn Stages

126  PARK test setup  DRIVE mode  REVERSE mode  PARK test setup  DRIVE mode  REVERSE mode 3 Fast Learn Stages

127  Engine OFF  Scan Tool Communication Loss  Restart engine  Procedure complete  Engine OFF  Scan Tool Communication Loss  Restart engine  Procedure complete ImportantImportant

128  Identified electrical inputs  Identified potential DTCs  Reviewed diagnostic procedures  Diagnosed vehicle concern  Identified electrical inputs  Identified potential DTCs  Reviewed diagnostic procedures  Diagnosed vehicle concern Module 4 Summary

129  Conducted Road Test  Described the Shift Speed Chart  Described the Range Reference Chart  Conducted Fuel System Pressure Check  Diagnosed a Vehicle/Transmission Concern  Conducted Road Test  Described the Shift Speed Chart  Described the Range Reference Chart  Conducted Fuel System Pressure Check  Diagnosed a Vehicle/Transmission Concern Course Summary

130  Reviewed the components of the 6T70/75  Reviewed diagnostic procedures for the 6T70/75  Diagnose transmission concern associated with the 6T70/75  Reviewed Service Fast Learn Adapts  Reviewed the components of the 6T70/75  Reviewed diagnostic procedures for the 6T70/75  Diagnose transmission concern associated with the 6T70/75  Reviewed Service Fast Learn Adapts Course Summary cont.

131  Identified electrical inputs  Identified potential DTCs  Reviewed diagnostic procedures  Diagnosed a 6L80 Transmission concern  Identified electrical inputs  Identified potential DTCs  Reviewed diagnostic procedures  Diagnosed a 6L80 Transmission concern Course Summary cont.

132 Posttest Question 8 In the 6L80, the Automatic Transmission Inline ___________, provides a connection between the TCM and the chassis wiring harness. A.20 way connector B.14 way connector C.16 way connector D.18 way connector A.20 way connector B.14 way connector C.16 way connector D.18 way connector

133 Posttest Question 9 All of the shift solenoids, pressure control solenoids, transmission fluid temperature sensor and fluid pressure switches are contained in one unit called the ______. A.Transmission Control Module B.Control Solenoid Valve Assembly C.Transmission Shift Interlock D.Shift Interlock Solenoid A.Transmission Control Module B.Control Solenoid Valve Assembly C.Transmission Shift Interlock D.Shift Interlock Solenoid

134 Posttest Question 10 When checking the transmission fluid in the 6L50/6L80/6L90, the correct temperature range should be ______. A.10C – 50C or 50F – 122F B.30C – 50C or 86F – 122F C.50C – 80C or 122F – 176F D.70C – 90C or 158F – 194F A.10C – 50C or 50F – 122F B.30C – 50C or 86F – 122F C.50C – 80C or 122F – 176F D.70C – 90C or 158F – 194F

135 To Obtain Posttest Results After 5 Business Days go to:   Select “Training Records” from menu  Select “View Your Training Records” After 5 Business Days go to:   Select “Training Records” from menu  Select “View Your Training Records”

136 Reviewed the concepts and procedures to properly diagnose and repair modern Automatic Transmission/Transaxle concerns. Session Summary

137  Turn to evaluation module; remove and complete evaluation  Use keypad to answer questions  Turn to evaluation module; remove and complete evaluation  Use keypad to answer questions  Press the “Next Quest” key after each question  Press “Yes” when completed  Press the “Next Quest” key after each question  Press “Yes” when completed Evaluation Instructions

138 Evaluation Instructions cont.  Fill out back of the evaluation form  Include today’s date, time and time zone  Fax to the Detroit IDL Center at (586)  Fill out back of the evaluation form  Include today’s date, time and time zone  Fax to the Detroit IDL Center at (586)

139 Automatic Transmission/Transaxle Theory, Operation & Diagnostics Course # D2 Automatic Transmission/Transaxle Theory, Operation & Diagnostics Course # D2 Thank you for attending

140 Copyright © 2007 General Motors Corporation. All Rights Reserved.