2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 609

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 609

* Passenger seat cushion and back element terminal 6

* Passenger seat cushion element terminal 2

* Passenger seat back element terminal 4

4. If all circuits test normal, replace the HSM.

B2508 01

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

2. 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:

* Driver seat cushion and back element terminal 3

* Driver seat cushion element terminal 5

* Driver seat back element terminal 1

3. 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:

* Passenger seat cushion and back element terminal 6

* Passenger seat cushion element terminal 2

* Passenger seat back element terminal 4

4. If all circuits test normal, replace the HSM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater

Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()

* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)

()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming

Rear Seat

DTC B2508 or B2509 (Rear Seat)

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 B2508 01

- Seat Heater Relay Circuit Short to Battery

DTC B2508 02

- Seat Heater Relay Circuit Short to Ground

Diagnostic Fault Information