2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2695
* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)
* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)
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)
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
Special Tools
DT-47825-10 - Jumper Harness
For equivalent regional tools, refer to Special Tools (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Tools and
Equipment/6L45/6L50/6L80/6L90 - Automatic Transmission).
Circuit/System Verification
1. If there are any other transmission DTCs set, diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See:
Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Ignition ON, observe the scan tool ECM Park/Neutral switch parameter while moving the gear shift lever from Park and through all ranges.
The parameter should display Park/Neutral when in Park or Neutral and In-Gear when in Reverse or Drive.
3. Observe the scan tool TCM IMS parameter while slowly moving the gear shift lever from Park through all ranges. Verify the gear position
matches the scan tool parameter. Refer to Transmission Internal Mode Switch Logic (See: Specifications/Mechanical
Specifications/Automatic Transmission/Transaxle/System Specifications/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission
Internal Mode Switch Logic).
瀚慖f not the specified value, refer to Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Shift Linkage/Shift Cable/Adjustments).
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the T12 automatic transmission assembly X1 connector.
2. Install the DT-47825-10 - jumper harness to the X1 vehicle wire harness connector.
3. Ignition OFF, test for less than 5 ohms between terminal 5 at the DT-47825-10 - jumper harness and ground at the transmission case.
瀚慖f greater than the specified value, test the ground circuit for an open/high resistance.
4. Ignition ON, verify with a scan tool the Park/Neutral parameter displays In Gear.
瀚慖f the Park/Neutral parameter displays Park/Neutral, test the signal circuit for a short to ground. If the circuit tests normal, replace the K20
ECM.
5. Ignition ON, connect a 3A fused jumper wire between terminal 3 on the DT-47825-10 - jumper harness and ground at the transmission case.
Verify with a scan tool the Park/Neutral parameter displays Park/Neutral.
瀚慖f the Park/neutral parameter displays In Gear, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the
K20 ECM.
6. Ignition OFF, disconnect the DT-47825-10 - jumper harness from the X1 vehicle harness connector.
7. Connect the X1 vehicle harness connector to the Q8 control solenoid valve assembly.
8. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement ().
9. Disconnect the B15 automatic transmission internal mode switch electrical connector from the K71 TCM.
