2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2463
* Inline Harness Connector End Views (See: Power and Ground Distribution/Multiple Junction Connector/Diagrams)
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
* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Electronic Component Description)
* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and
Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)
* 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)
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
1. Perform the Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift
Linkage/Shift Cable/Adjustments) procedure to verify proper adjustment.
2. Ignition ON, observe the scan tool IMS parameter while moving the gear shift lever from Park, through all gear selector positions, and back
to Park. The parameter should match each gear range that is selected. 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).
3. Observe the scan tool Engine Control Module P/N switch parameter with the gear selector in Park and Neutral position. The parameter
should display Park in park position and Neutral in neutral position.
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
Note: You must perform Circuit/System Verification first.
1. Ignition OFF, remove the automatic transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement ().
2. Disconnect the IMS connector at the Q8 control solenoid valve assembly.
Note: Under certain driving conditions, DTC P182E could set due to an intermittent low voltage fault on the P/N signal circuit, before
conditions for setting DTC P0851 are met.
3. Ignition ON, verify the scan tool engine control module (ECM) P/N switch displays In Gear.
瀚慖f not the specified value, test the P/N signal circuit for a short to ground. If the circuit tests normal, replace the engine control module.
4. Verify the scan tool IMS A/B/C/P parameter displays HI for all four signal circuits.
瀚慖f not the specified value, replace the Q8 control solenoid valve assembly.
5. Connect a 3A fused jumper wire between each transmission range signal circuit terminals listed below and the IMS ground circuit. The
appropriate scan tool IMS A/B/C/P parameter should display LOW when the terminal is connected to the IMS ground circuit.
* Switch Signal A: terminal E to terminal A
* Switch Signal B: terminal D to terminal A
* Switch Signal C: terminal C to terminal A
* Switch Signal P: terminal P to terminal A
瀚慖f not the specified value, replace the Q8 control solenoid valve assembly.
