2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 500

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 500

DTC B1544, B1600, or B1605

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 B1544 01

- Mirror Motors Common Circuit Short to Battery

DTC B1544 02

- Mirror Motors Common Circuit Short to Ground

DTC B1544 04

- Mirror Motors Common Circuit Open

DTC B1600 01

- Mirror Motor Vertical Circuit Short to Battery

DTC B1600 02

- Mirror Motor Vertical Circuit Short to Ground

DTC B1600 04

- Mirror Motor Vertical Circuit Open

DTC B1605 01

- Mirror Motor Horizontal Circuit Short to Battery

DTC B1605 02

- Mirror Motor Horizontal Circuit Short to Ground

DTC B1605 04

- Mirror Motor Horizontal Circuit Open

Diagnostic Fault Information

Circuit/System Description

The Driver Door Module (DDM) or Passenger Door Module (PDM) controls the mirror horizontal and vertical motors through the use of

bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the

mirror motor vertical control circuit and voltage or ground is supplied through the mirror motor common control circuit.

Horizontal controls operate in the same manner with the mirror motor horizontal control circuit supplying voltage or ground and the mirror motor

common control circuit suppling voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

B1544

An improper voltage level is detected on the driver/passenger mirror motor common control circuit while the mirror is being commanded.