2010 Cadillac CTS Sedan AWD V6-3.6L Page 458

2010 Cadillac CTS Sedan AWD V6-3.6L Page 458

The heated seat function for the affected seat will be disabled.

Conditions for Clearing the DTC

* The current DTC will clear and set the code to history 3 seconds after the reference voltage returns to normal operating range and the ignition

is cycled OFF then back to ACC or RUN.

* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Heated/Vented Seat Description and Operation (See: Body and Frame/Seats/Seat Temperature Element/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

B1925 02 or B1925 05

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

2. Test for 1.4 k-300 kOhms between the signal circuit terminal 1 X5 and the low reference circuit terminal 3 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

temperature sensor.

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

circuits test normal, replace the seat temperature sensor.

3. Ignition OFF, connect the X2, X5 harness connectors at the MSM.

4. Disconnect the harness connector at the seat cushion heating 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. 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.

B2170 02 or B2170 05

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

2. Test for 1.4k - 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

temperature sensor.

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

circuits test normal, replace the seat temperature sensor.

3. Ignition OFF, connect the X2, X5 harness connectors at the MSM.

4. Disconnect the harness connector at the seat cushion heating 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. 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.