2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 544

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 544

1. Ignition OFF, disconnect the X2, X5 harness connectors at the MSM.

2. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 2 X5 and the low reference circuit terminal 6 X2.

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

cushion heater element/temperature sensor.

瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits

test normal, replace the seat cushion heater element/temperature sensor.

3. Connect the X2, X5 harness connectors at the MSM.

4. Disconnect the harness connector at the seat cushion heater element/temperature sensor.

5. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the MSM.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.

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

Repair Instructions

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

* 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 MSM replacement, setup, and programming

HP2 or Dealer Installed W/O Memory

DTC B1925 or B2170 (HP2 or Dealer Installed w/o Memory)

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 B1925 02

- Left Seat Heater Cushion Sensor Circuit Shorted to Ground

DTC B1925 05

- Left Seat Heater Cushion Sensor Circuit Shorted to Battery or Open

DTC B2170 02

- Right Seat Heater Cushion Sensor Circuit Shorted to Ground

DTC B2170 05

- Right Seat Heater Cushion Sensor Circuit Shorted to Battery or Open

Diagnostic Fault Information