2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 539

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 539

瀚慖f the test lamp illuminates, test the control circuits listed below for a short to voltage:

* Passenger seat cushion and seat back terminal 3

* Passenger seat cushion element terminal 2

* Passenger seat back element terminal 4

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

B2345 13

1. Ignition OFF, disconnect the X2, X4 harness connectors at the HSM.

2. Test for greater than 850 ohms between the signal and the low reference circuits listed below:

* Driver seat cushion terminal 9 X4 and terminal 6 X2

* Passenger seat cushion terminal 20 X4 and terminal 8 X2

瀚慖f less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the

appropriate seat cushion heater element/temperature sensor.

3. Test for greater than 850 ohms between the signal and the low reference circuits listed below:

* Driver seat back terminal 19 X4 and terminal 5 X2

* Passenger seat back terminal 10 X4 and terminal 7 X2

瀚慖f less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the

appropriate seat back heater element/temperature sensor.

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

B2345 42 or B2345 4B

If either DTC is set, 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

Dealer Installed

DTC B2345 (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.

DTC Descriptors

DTC B2345 00

- Seat Heater Disable Circuit

DTC B2345 13

- Seat Heater Elements Temperature Above Threshold

DTC B2345 42

- Seat Heater Elements Current Sensing Calibration Not Programmed

DTC B2345 4B

- Seat Heater Elements Current Sensing Calibration Out of Range