2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 961
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Circuit/System Verification
1. Verify that DTC U0100, U0121, U0140, or U2099 are not set.
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Verify that DTC C0035, C0040, C0045, C0050, OR C0131 are not set.
锟斤拷If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Replace the fuel pump/trailer brake control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning)for fuel pump/trailer brake control module replacement,
setup, and programming
Gasoline With LY6, or Diesel
DTC C0561 (Gasoline With LY6, or Diesel)
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 C0561 F0
- System Disabled Information Stored Invalid Serial Data Received
DTC C0561 F1
- System Disabled Information Stored Invalid Serial Data Received
Circuit/System Description
Diagnostics are used to determine whether or not there is a fault with the brake pressure or wheel speed data being received by the trailer brake
control module (TBCM) over GMLAN serial data.
The loss of serial data brake pressure diagnostic is to determine whether or not there is a fault with the brake pressure data being received over
GMLAN. This diagnostic looks at the brake pressure signal validity and protection value signals over a period of time to determine the fault state of
the brake pressure sensor.
The loss of serial data wheel speed diagnostic is to determine whether or not there is a fault with the wheel speed data being received over
GMLAN. This diagnostic looks at the wheel speed signal validity and sequence number errors over a period of time to determine the fault state
Conditions for Running the DTC
* Ignition ON.
* Ignition voltage is 9.5-17 V.
Conditions for Setting the DTC
* The EBCM diagnoses a fault condition in the master cylinder pressure sensor, and sends a serial data message to the trailer brake control
module.
* The EBCM diagnoses a fault condition in the wheel speed sensors, and sends a serial data message to the trailer brake control module.
* The trailer brake control module losses communication with the EBCM.
