2010 Cadillac CTS Sedan AWD V6-3.6L Page 355

2010 Cadillac CTS Sedan AWD V6-3.6L Page 355

* 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

B1335 0B

1. Ignition ON, use a scan tool to clear the current and history diagnostic trouble code.

2. Determine which motor set this DTC by operating the motors listed below one at a time in both directions. Check for the DTC to set between

each motor test.

* Driver seat front vertical motor

* Driver seat rear vertical motor

* Driver seat horizontal motor

* Driver seat recline motor

* Driver seat lumbar horizontal motor

3. Clear the diagnostic trouble codes.

4. Ignition OFF, disconnect the harness connector at the appropriate seat or lumbar motor for which the DTC set.

5. Ignition ON, operate the motor adjuster switch in both directions. DTC B1335 0B should not set.

瀚慖f the DTC sets, test for a short between the appropriate control circuits listed below. If the circuits test normal, replace the MSM.

* Driver seat front vertical motor terminal 1 and terminal 5

* Driver seat rear vertical motor terminal 1 and terminal 5

* Driver seat horizontal motor terminal 1 and terminal 5

* Driver seat recline motor terminal 1 and terminal 5

* Driver seat lumbar horizontal motor terminal A and terminal B

6. Test the appropriate control circuits listed below for a high resistance. If the circuits test normal, test or replace the seat or lumbar motor.

* Driver seat front vertical motor terminal 1 and terminal 5

* Driver seat rear vertical motor terminal 1 and terminal 5

* Driver seat horizontal motor terminal 1 and terminal 5

* Driver seat recline motor terminal 1 and terminal 5

* Driver seat lumbar horizontal motor terminal A and terminal B

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

B1335 42 or B1335 4B

If either DTC is set, replace the MSM.

Component Testing

Seat Motor

1. Ignition OFF, disconnect the harness connector at the appropriate seat motor.

Important: When performing the following tests, make sure that the seat is not already in the position the test is attempting to

produce.

2. Install a 30 A fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal

5 and ground. The seat motor should momentarily perform the appropriate FORWARD/REARWARD/UP/DOWN function.

瀚慖f the function does not perform as specified, replace the seat motor.

3. Reverse the polarity of jumper wires. The a seat motor should perform in the opposite direction.

瀚慖f the function does not perform as specified, replace the seat motor.

Repair Instructions

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