2010 Cadillac CTS Sedan AWD V6-3.6L Page 475

2010 Cadillac CTS Sedan AWD V6-3.6L Page 475

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

B2425 0D or B2425 0E

1. Ignition OFF, disconnect the X3 harness connector at the MSM.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the harness connector at the seat back heating element.

4. Test for 1.7 - 7.0 Ohms between the control circuit terminal A and control circuit terminal B.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heating

element.

瀚慖f greater than the specified range, replace the seat back heating element.

5. Connect the harness connector at the seat back heating element and disconnect the X1 harness connector at the MSM.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

6. Test for 1.7 - 7.0 Ohms between the control circuit terminal 6 and control circuit terminal 11.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heating

element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion

heating element.

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

B2430 0D or B2430 0E

1. Ignition OFF, disconnect the X3 harness connector at the MSM.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the harness connector at the seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 1.7 - 7.0 Ohms between the control circuit terminal A and control circuit terminal B.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heating

element.

瀚慖f greater than the specified range, replace the seat back heating element.

5. Connect the harness connector at the seat back heating element and disconnect the X1, X4 harness connectors at the MSM.

6. Test for 1.7 - 7.0 Ohms between the control circuit terminal 14 X1 and the control circuit terminal 14 X4.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heating

element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion

heating element.

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