2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1893

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1893

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Verification

Test for the correct operation of the IMS. Refer to Transmission Internal Mode Switch Logic (See: Specifications/Mechanical

Specifications/Automatic Transmission/Transaxle/System Specifications/2ML70 - Automatic Transmission/Transmission Internal Mode Switch

Logic).

If the IMS operation matches the IMS logic table, the system if functioning normally.

Circuit/System Testing

1. Disconnect the IMS harness connector at the control solenoid (w/body and TCM) valve assembly. Ignition ON. The scan tool IMS A/B/C/P

parameter should display HI for all 4 signal circuits.

瀚慖f a signal circuit displays LOW, replace the control solenoid (w/body and TCM) valve assembly.

2. Connect a 3-amp fused jumper wire between each transmission range signal circuit at the control solenoid (w/body and TCM) valve assembly

and ground. With a scan tool, ensure that each signal circuit displays LOW when connected to ground.

瀚慖f a signal circuit remains HI when connected to ground, replace the control solenoid (w/body and TCM) valve assembly.

3. Connect the IMS harness connector to the control solenoid (w/body and TCM) valve assembly. Disconnect the IMS connector. The scan tool

IMS A/B/C/P parameter should display HI for all 4 signal circuits.

瀚慖f a signal circuit displays LOW, replace the IMS jumper harness.

4. Connect a 3-amp fused jumper wire between each transmission range signal circuit at the IMS connector harness and ground. With a scan

tool, ensure that each signal circuit displays LOW when connected to ground.

瀚慖f a signal circuit remains HI when connected to ground, replace the IMS harness.

瀚慖f a signal circuit other than the circuit being grounded displays LOW, replace the IMS harness.

瀚慖f all circuits test normal, replace the IMS.

Component Testing

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Important: 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/2ML70 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection) for the following components before replacing