2010 Cadillac Truck Escalade AWD V8-6.2L Page 1019
2. Ignition OFF, disconnect the harness connector at the solid state relay.
3. Test for less than 5 ohm between the ground circuit terminal B and ground.
锟斤拷If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal F and ground.
锟斤拷If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
STUD 2 fuse is open, replace the trailer brake control relay.
5. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and ground.
锟斤拷If test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control module.
6. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and B+.
锟斤拷If test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the trailer brake control module.
7. Ignition ON, test for 3.2-4.1 V between the control circuit terminal C and ground.
锟斤拷If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
锟斤拷If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
8. Ignition ON, test for 3.2-4.1 V between the control circuit terminal A and ground.
锟斤拷If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
锟斤拷If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
9. Ignition ON, test for less than 1 V between the control circuit terminal D and ground.
锟斤拷If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
10. If all circuits test normal, replace the trailer brake solid state relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Trailer Brake Control Relay Replacement (1500) (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing
Relay/Service and Repair/Trailer Brake Control Relay Replacement (1500))Trailer Brake Control Relay Replacement (2500) (See:
Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing Relay/Service and Repair/Trailer Brake Control Relay
Replacement (2500))
* Trailer Brake Control Module Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control
Module/Service and Repair/Trailer Brake Control Module Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for TBCM replacement, setup, and programming
Gasoline Without LY6
DTC C0880, C0890, C1115, C1116, C1117, or C1118 (Gasoline Without LY6)
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 C0880 00
- Device Voltage Reference Output 2 Circuit
