2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3269

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3269

1. Ignition OFF, disconnect the harness connector at the electronic compass module.

2. Ignition OFF, test for less than 5.0 ohm between the ground circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 1 and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

4. Test for 6.0-7.0 V between the LIN Bus circuit terminal 3 and ground.

瀚慖f greater than the specified range, test the LIN Bus circuit for a short to voltage. If the circuit tests normal, replace the BCM.

瀚慖f less than the specified range, test the LIN Bus circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the BCM.

5. If all circuits test normal, replace the electronic compass module.

Window Malfunction Test

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.

2. Ignition OFF, test for less than 2.0 ohm between the ground circuit terminal 4 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 3 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Test for 6.0-7.0 V between the LIN circuit terminal 5 and ground.

瀚慖f greater than the specified range, test the LIN circuit for a short to voltage. If the circuit tests normal, replace the door module.

瀚慖f less than the specified range, test the LIN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

door module.

5. If all circuits test normal, replace the window motor.

Repair Instructions

Note: Each window regulator motor or front window and door lock switch, if replaced needs to be setup for proper operation.

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

* Front Side Door Window Regulator Motor Replacement (See: Windows and Glass/Windows/Service and Repair/Front Side Door Window

Regulator Motor Replacement)

* Rear Side Door Window Regulator Motor Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window

Regulator Motor Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for window, and door lock switches (door

modules), window regulator motors, or electronic compass module replacement, setup, and programming

U1511

DTC U1500, U1511, U1512, or U1513

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC U1500 01

- Inter-Device Dedicated Bus 1 Short to Battery

DTC U1500 02

- Inter-Device Dedicated Bus 1 Short to Ground