2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 611
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Verify the type of vehicle and the heated seat system for which the DTC set.
If the DTC set in the rear heated seat module, refer to Circuit/System Testing below.
If the DTC set in a vehicle equipped with memory, refer to DTC B2508 or B2509 (w/o HP2 with memory).
If the DTC set in a hybrid vehicle without memory, refer to DTC B2508 or B2509 (HP2 w/o memory).
If the DTC set in a non-hybrid vehicle without memory, refer to DTC B2508 or B2509 (Dealer installed).
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the RHSM.
2. Test for infinite resistance between the control circuit terminal 3 and ground.
瀚慖f not the specified value, test the control circuits listed below for a short to ground:
* Left rear seat cushion terminal 3
* Left rear seat cushion terminal 5
3. Test for infinite resistance between the control circuit terminal 6 and ground.
瀚慖f not the specified value, test the control circuits listed below for a short to ground:
* Right rear seat cushion terminal 6
* Right rear seat cushion terminal 2
4. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 3 and ground.
瀚慖f the test lamp illuminates, test the control circuits listed below for a short to voltage:
* Left rear seat cushion terminal 3
* Left rear seat cushion terminal 5
5. Verify that a test lamp does not illuminate between the control circuit terminal 6 and ground.
瀚慖f the test lamp illuminates, test the control circuits listed below for a short to voltage:
* Right rear seat cushion terminal 6
* Right rear seat cushion terminal 2
6. If all circuits test normal, replace the RHSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Rear Seat Cushion Heater Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the RHSM replacement, setup, and
programming
Dealer Installed
DTC B2508 or B2509 (Dealer Installed)
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.
