B1D92

B1D92-STEERING COLUMN TILT POSITION SENSOR CIRCUIT HIGH





For a complete wiring diagram consult Diagrams/Electrical.

Theory of Operation


The MSM input signal from the Steering Column Tilt Sensor is recognized in a specified voltage area. The input channel is an analog to digital converter input and the sensor is a hall sensor.


- When Monitored:
The hall supply voltage is switched on when the motor becomes activated.

- Set Condition:
The sensed input is recognized in a defined voltage area (between 3.7 and 5.0 volts at the controller input, not at the module input) for more than 14 mS








Diagnostic Test


1. DTC IS ACTIVE
Ignition on, engine not running.
With the Scan Tool, select Clear Stored DTCs in the Memory Seat Module.
Move the Steering Column Tilt Switch to the Up and Down 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 this DTC reset and/or remain active?

Yes


- Go to 2


No


- Go to 10




2. CHECK DTC WITH HARNESS DISCONNECTED
Turn the ignition off.
Disconnect the Steering Tilt Motor harness connector.
Ignition on, engine not running.
Move the Steering Column Tilt Switch to the Up and Down positions several times.
With the Scan Tool, select Clear Stored DTCs in the Memory Seat Module.
Move the Steering Column Tilt Switch to the Up and Down 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 this DTC reset and/or remain active?

Yes


- Go to 3


No


- Go to 8




3. (P151) TILT STEERING UP/DOWN POSITION SENSE CIRCUIT OPEN




Turn the ignition off.
Disconnect the Memory Seat Module (MSM) C1 connector.
Measure the resistance of the (P151) Tilt Steering Up/Down Position Sense circuit.
Is the resistance above 5.0 ohms?

Yes


- Repair the (P151) Tilt Steering Up/Down Position Sense circuit for an open.


No


- Go to 4




4. (P151) TILT STEERING UP/DOWN POSITION SENSE CIRCUIT SHORT TO VOLTAGE




Turn the ignition on.
Measure the voltage of the (P151) Tilt Steering Up/Down Position Sense circuit.
Is there any voltage present?

Yes


- Repair the (P151) Tilt Steering Up/Down Position Sense circuit for a short to voltage.


No


- Go to 5




5. (P151) TILT STEERING UP/DOWN POSITION SENSE CIRCUIT SHORT TO TILT/TELESCOPE MOTOR CIRCUIT(S)




Turn the ignition off.
Measure the resistance between the following circuits at the Memory Seat Module (MSM) C1 connector :
- The (P151) Tilt Steering Up/Down Position Sense circuit and the (P157) Telescope Steering Motor Forward/Rearward Driver circuit.

- The (P151) Tilt Steering Up/Down Position Sense circuit and the (P153) Tilt Steering Motor Up/Down Driver circuit.

- The (P151) Tilt Steering Up/Down Position Sense circuit and the (P953) Steering Motor Common circuit.

Is the resistance below 5.0 ohms for any of the circuit tests?

Yes


- Repair the (P151) Tilt Steering Up/Down Position Sense circuit for a short to the motor circuit(s).


No


- Go to 6




6. (G914) SENSOR RETURN CIRCUIT OPEN




Measure the resistance of the (G914) Sensor Return circuit.
Is the resistance above 5.0 ohms?

Yes


- Repair the (G914) Sensor Return circuit for an open.


No


- Go to 7




7. (G914) SENSOR RETURN CIRCUIT SHORT TO VOLTAGE




Turn the ignition on.
Measure the voltage of the (G914) Sensor Return circuit.
Is there any voltage present?

Yes


- Repair the (G914) Sensor Return circuit for a short to voltage.


No


- Go to 9




8. STEERING COLUMN TILT MOTOR
Thoroughly inspect the wiring and connectors between the Memory Seat Module harness connector and the Steering Tilt Motor for a short to voltage or to any other circuit. If any problems are found, repair as necessary. If no other problems are found, view repair.


Repair


- Replace the Steering Column Tilt Motor.




9. MEMORY SEAT MODULE (MSM)
Thoroughly inspect the wiring and connectors between the Memory Seat Module harness connector and the Steering Tilt Motor harness connector for a short to voltage or to any other circuit. If any problems are found, repair as necessary. If no other problems are found, view repair.


Repair


- Replace the Memory Seat Module (MSM).




10. INTERMITTENT STEERING COLUMN TILT POSITION SENSOR CIRCUIT HIGH 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.