B1D97

B1D97-STEERING COLUMN TILT MOTOR CONTROL CIRCUIT PERFORMANCE





For a complete wiring diagram Refer to Diagrams/Electrical. Electrical Diagrams


Theory of Operation


This DTC will set if movement in the Tilt Motor is requested and no motor movement is detected and only if failure counters are matured for both motor directions (up/down). If the motor becomes energized and there are no hall pulses recognized after motor activation, the MSM will de-energize the motor after 2 seconds.


- When Monitored:

When the motor is activated in either direction, until de-energized by the MSM.

- Set Condition:

No movement is detected in an activated motor for more than 2000 ms.








Diagnostic Test


1. DTC IS ACTIVE

Ignition on, engine not running.


NOTE: If a DTC is set for B1D8D and/or B1D8E, perform the diagnostic procedure(s) before continuing.

With the Scan Tool, select Clear Stored DTCs in the Memory Seat Module.

Move the Steering Column Tilt Switch to the Forward and Rearward positions several times, holding the switch in position for at least 2 seconds each time.

With the Scan Tool, select View DTCs in the Memory Seat Module.

Does the DTC reset and/or remain active?

Yes

- Go to 2

No

- Go to 14



2. (P153) TILT STEERING MOTOR UP/DOWN DRIVER CIRCUIT - TEST TO GROUND





Turn the ignition off.

Disconnect the Steering Tilt Motor harness connector.

Turn the ignition on.

Using a 12-volt test light connected to 12-volts, check the (P153) Tilt Steering Motor Up/Down Driver circuit.

Monitor the test light with the Steering Column Tilt Switch in the Up position, the Down position and with the switch at rest.

The test light should be illuminated and bright only when the switch is in the Down position.

Does the test light illuminate as described?

Yes

- Go to 3

No

- Go to 6



3. (P953) TILT STEERING MOTOR COMMON CIRCUIT - TEST TO GROUND





Using a 12-volt test light connected to 12-volts, check the (P953) Tilt Steering Motor Common circuit.

Monitor the test light with the Steering Column Tilt Switch in the Up position, the Down position and with the switch at rest.

The test light should be illuminated and bright when the switch is in the Up position and when the switch is at rest.

Does the test light illuminate as described?

Yes

- Go to 4

No

- Go to 9



4. (P153) TILT STEERING MOTOR UP/DOWN DRIVER CIRCUIT- TEST TO VOLTAGE





Using a 12-volt test light connected to ground, check the (P153) Tilt Steering Motor Up/Down Driver circuit.

Monitor the test light with the Steering Column Tilt Switch in the Up position, the Down position and with the switch at rest.

The test light should be illuminated and bright only when the switch is in the Up position.

Does the test light illuminate as described?

Yes

- Go to 5

No

- Go to 6



5. (P953) TILT STEERING MOTOR COMMON CIRCUIT - TEST TO VOLTAGE





Using a 12-volt test light connected to ground, check the (P953) Tilt Steering Motor Common circuit.

Monitor the test light with the Steering Column Tilt Switch in the Up position, the Down position and with the switch at rest.

The test light should be illuminated and bright only when the switch is in the Down position.

Does the test light illuminate as described?

Yes

- Go to 12

No

- Go to 9



6. (P153) TILT STEERING MOTOR UP/DOWN DRIVER CIRCUIT SHORT TO GROUND





Turn the ignition off.

Disconnect the Memory Seat Module (MSM) C1 connector.

Turn the ignition on.

Using a 12-volt test light connected to 12-volts, check the (P153) Tilt Steering Motor Up/Down Driver circuit.

Does the test light illuminate?

Yes

- Repair the (P153) Tilt Steering Motor Up/Down Driver circuit for a short to ground.

No

- Go to 7



7. (P153) TILT STEERING MOTOR UP/DOWN DRIVER CIRCUIT OPEN





Turn the ignition off.

Measure the resistance of the (P153) Tilt Steering Motor Up/Down Driver circuit.

Is the resistance above 5.0 ohms?

Yes

- Repair the (P153) Tilt Steering Motor Up/Down Driver circuit for an open.

No

- Go to 8



8. (P153) TILT STEERING MOTOR UP/DOWN DRIVER CIRCUIT SHORT TO VOLTAGE





Turn the ignition on.

Measure the voltage of the (P153) Tilt Steering Motor Up/Down Driver circuit.

Is there any voltage present?

Yes

- Repair the (P153) Tilt Steering Motor Up/Down Driver circuit for a short to voltage.

No

- Go to 13



9. (P953) TILT STEERING MOTOR COMMON CIRCUIT SHORT TO GROUND





Turn the ignition off.

Disconnect the Memory Seat Module (MSM) C1 connector.

Turn the ignition on.

Using a 12-volt test light connected to 12-volts, check the (P953) Tilt Steering Motor Common circuit.

Does the test light illuminate?

Yes

- Repair the (P953) Tilt Steering Motor Common circuit for a short to ground.

No

- Go to 10



10. (P953) TILT STEERING MOTOR COMMON CIRCUIT OPEN





Turn the ignition off.

Measure the resistance of the (P953) Tilt Steering Motor Common circuit.

Is the resistance above 5.0 ohms?

Yes

- Repair the (P953) Tilt Steering Motor Common circuit for an open.

No

- Go to 11



11. (P953) TILT STEERING MOTOR COMMON CIRCUIT SHORT TO VOLTAGE





Turn the ignition on.

Measure the voltage of the (P953) Tilt Steering Motor Common circuit.

Is there any voltage present?

Yes

- Repair the (P953) Tilt Steering Motor Common circuit for a short to voltage.

No

- Go to 13



12. STEERING COLUMN TILT MOTOR

Inspect the wiring between the Memory Seat Module harness connector and the Steering Column Tilt Motor harness connector for a short to ground or to any other circuit. If any problems are found, repair as necessary. If no problems are found, view repair.



Repair

- Replace the Steering Column Tilt Motor.



13. MEMORY SEAT MODULE (MSM)

Inspect the wiring between the Memory Seat Module harness connector and the Steering Column Tilt Motor harness connector for a short to ground or to any other circuit. If any problems are found, repair as necessary. If no problems are found, view repair.



Repair

- Replace the Memory Seat Module (MSM).



14. INTERMITTENT STEERING COLUMN TILT MOTOR CONTROL CIRCUIT PERFORMANCE DTC

The conditions necessary to set this DTC are not present at this time.

While monitoring the scan tool data relative to this circuit, wiggle test the component and connectors and move the switch to each position.

Look for the data to change other than as expected or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

- Repair as necessary.

No

- Test complete.