2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3266

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3266

瀚慖f greater than the specified range, test the serial data circuit for an open/high resistance between the non communicating control module

and a control module setting the DTC or a serial data splice pack.

10. If all circuits test normal, replace the control module that is not communicating.

Repair Instructions

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

* GMLAN Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control module replacement, setup, and

programming

U1500

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

DTC U1500 31

- Electronic Control Unit (ECU) Performance General Checksum Failure

DTC U1511 00

- Inter-device Dedicated Bus Lost Communication With Device 1

DTC U1512 00

- Inter-device Dedicated Bus Lost Communication With Device 2

Diagnostic Fault Information