2010 Cadillac Truck SRX FWD V6-3.0L Page 1717
P0741
* DTC P0741 is a Type B DTC.
* Deviation between Engine speed and output speed is less than 30 RPM during lockup control is turned on.
* DTC P0742 is a Type B DTC.
* Deviation between Engine speed and output speed is more than 100 RPM during lockup control is turned off.
Diagnostic Aids
Ensure the transmission fluid level, color and odor is correct and there are no leaks. If there are any other transmission DTCs set, diagnose those
first.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams/Electrical
Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Description and Operation
Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/AF40-6 - Automatic Transmission/Transmission Component and System Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Operate the vehicle in drive with the calculated throttle position greater than 8% and ensure TCC is commanded ON and OFF a minimum of 5
times.
Verify the DTC does not reset. If the DTC resets and no other DTC is set, go to Circuit/System Testing.
If any other DTC is set, diagnose that DTC first.
Circuit/System Testing
Dynamic Test
1. Perform the line pressure check. Refer to Line Pressure Check (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Testing and Inspection/Symptom Related Diagnostic Procedures/AF40-6 - Automatic Transmission/Line Pressure
Check).
2. Perform the transmission fluid check. Refer to Transmission Fluid Level and Condition Check (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Testing and Inspection/Symptom Related Diagnostic Procedures/AF40-6 - Automatic Transmission/Transmission
Fluid Level and Condition Check).
3. If all circuits test normal, replace the K71 Transmission Control Module. Verify the DTC does not reset.
瀚慖f the DTC resets, go to Component Testing.
Component Testing
Static Test
1. Inspect the valve body assembly for a stuck valve, debris, or damage.
瀚慖f a stuck open or closed valve is found, replace the valve body assembly.
