2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1128
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, engine OFF, observe the scan tool IMS A/B/C/P parameter while moving the gear shift lever from Park, to Reverse and through
all the ranges. 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/6T70/6T75 - Automatic
Transmission/Transmission Internal Mode Switch Logic).
3. Observe the scan tool engine control module (ECM) PNP Switch parameter while moving the gear shift lever from Park, to Reverse and
through all the ranges. The parameter should display Park/Neutral in the Park and Neutral positions, and In Gear in all other positions.
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.
Note: Under certain driving conditions, DTC P182E could set due to an intermittent low voltage fault on the park/neutral signal circuit,
before conditions for setting DTC P0851 are met.
1. Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement (See: Transmission and
Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair/6T70/6T75 - Automatic Transmission/Control Valve Body
Cover Replacement).
2. Connect the TCM harness connector.
3. Disconnect the IMS connector X2 at the control solenoid valve assembly.
4. Ignition ON, verify the scan tool IMS A/B/C/P parameter displays HI for all 4 signal circuits.
瀚慖f not the specified value, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control
Module Assembly Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission
and Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).
5. Verify the scan tool ECM PNP Switch parameter displays In Gear.
瀚慖f not the specified value, test the park/neutral signal circuit for a short to ground. If the circuit tests normal, replace the engine control
module.
6. Connect a 3-amp fused jumper wire between each transmission range signal circuit terminal listed below and the IMS ground circuit,
terminal A on the TCM assembly. The corresponding scan tool IMS A/B/C/P parameter should display LOW when the terminal is connected
to the IMS ground.
* Switch Signal A terminal E
* Switch Signal B terminal D
* Switch Signal C terminal C
* Switch Signal P terminal B
瀚慖f not the specified value, replace the control solenoid valve assembly.
7. Connect a 3-amp fused jumper wire between park/neutral switch signal circuit terminal F and IMS ground circuit terminal A on the TCM
assembly. Verify the ECM PNP Switch parameter changes from IN Gear to Park/Neutral.
瀚慖f not the specified value, test the park/neutral signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
8. If all circuits test normal, replace the IMS.
Repair Instructions
Note:
* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and
Inspection/Programming and Relearning) following all transmission related repairs.
* Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Control
Solenoid Valve and Transmission Control Module Assembly Inspection) before replacing the TCM.
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement (See: Powertrain Management/Computers and Control
Systems/Sensors and Switches - Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair)
* Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Linkage/Shift
Cable/Adjustments)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or control solenoid valve assembly
replacement, setup, and programming
