Friday, December 27, 2019

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2962

signal and checks for messages from other vehicle control modules prohibiting the window movement. If no prohibitive messages have been

received, the door control module sends a LIN serial data message to the appropriate power window motor commanding the requested window

position.

The driver information center (DIC) displays the compass based on serial data message from the BCM. The compass module communicates with

the body control module (BCM) through a bi-directional data circuit (LIN).

Conditions for Running the DTC

The system voltage is between 9-16 V.

Conditions for Setting the DTC

U1500 01

When there is a short to voltage in the local interconnect network bus circuit.

U1500 02

When there is a short to ground in the local interconnect network bus circuit.

U1500 31

The module has detected an internal malfunction.

U1511, U1512

The DTC will set when there is an open/high resistance in the local interconnect network bus circuit, or an open in the voltage or ground circuits of

the motor or module.

Action Taken When the DTC Sets

U1500

The individual LIN bus will be inoperative, disabling all windows on one side of the vehicle.

U1500 31

The module refuses all additional inputs.

U1511

* If set in the driver door lock window switch or passenger door lock window switch, no window on the specific side of the vehicle will

operate if the open is before the first splice from the door module, and both DTC U1511 and U1512 should set. If open after the first splice,

the individual window will be inoperative and a single DTC should set.

* If set in the BCM, the compass is inoperative in the DIC.

U1512

No window on the specific side of the vehicle will operate if the open is before the first splice from the door module, and both DTC U1511 and

U1512 should set. If open after the first splice, the individual window will be inoperative and a single DTC should set.

Conditions for Clearing the DTC

* The current DTC will clear when the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Diagnostic Aids

* A window regulator motor may cause a short to the local interconnect network bus circuit, and will cause all windows on one side to be

inoperative.

* An open/high resistance between the door module and the first splice from the module will cause all windows on one side to be inoperative.

* An open/high resistance between the window regulator motor and the first splice from the motor will cause only one window to be

inoperative.

Reference Information

Schematic Reference

* Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical

Diagrams)

* Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System