B1D5C

B1D5C-23-ADJUSTABLE PEDAL SWITCH CIRCUIT STUCK FORWARD - SIGNAL STUCK LOW

For a complete wiring diagram, refer to the Wiring Information.





Theory of Operation

The Memory System is made up of the Memory Seat Module-Driver (MSMD), Memory Switch, Driver Seat Switch, Adjustable Pedal Switch, and multiple Seat Motors and an Adjustable Pedal Motor. The motors each contain a hall-effect position sensor. The hall-effect position sensor provides feedback to the MSMD in relation to the motors position.

The Driver Seat Switch is a Multiplex (Mux) switch which uses set resistance levels for each switch position. These resistances correspond to different voltages which is monitored by the MSMD over two separate circuits. When a voltage change is detected, the MSMD will command the appropriate Seat motor(s) to move the seat in the requested direction as long as the Driver Seat Switch is held in that direction or its stops have been reached.

The Adjustable Pedal Switch is a three position switch (forward, center, rearward). The MSMD monitors the forward and rearward circuits voltage. If a voltage change is detected, the MSMD will command the Adjustable Pedal motor to move the pedals in the requested direction as long as the Adjustable Pedal Switch is held in that direction or its stops have been reached.

The Memory Switch is a Mux switch that is used to set and recall the seat and pedal positions. When a Memory Switch button is pressed, the Driver Door Module (DDM) detects a voltage change and sends a request over the Controller Area Network (CAN) bus circuit to the MSMD to perform the requested command. If the SET button on the Memory Switch is pressed, followed by the 1 or 2 button, the MSMD will store the seat and pedal positions based on the position inputs received from the hall-effect position sensors. If the 1 or 2 button on the Memory Switch is pressed, the MSMD will recall the stored seat and pedal positions for that particular selection and return the seat and pedals to the stored positions. Memory position may also be recalled using a linked FOBIK transmitter. For driver safety, the MSMD will prevent the memory recall function from being initiated if the transmission gear selector lever is not in the Park position or if the vehicle is moving. For further information Memory Seat Module - Operation.

- When Monitored:
The Adjustable Pedals Switch is in active operation.

- Set Condition:
The Memory Seat Module-Driver (MSMD) detects the Adjustable Pedals Switch has been activated in the forward position for period of 50 seconds or more.





Diagnostic Test

1. CHECK IF THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, record and erase Memory Seat Module-Driver (MSMD) DTCs.
3. Cycle the ignition switch from off to on.
4. Wait a minimum of 50 seconds and with the scan tool, read MSMD DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Perform the APS INTERMITTENT CONDITION TEST. Testing and Inspection.

2. CHECK THE ADJUSTABLE PEDALS SWITCH
1. Turn the ignition off to the lock position.
2. Disconnect the Adjustable Pedals Switch harness connector.
3. Cycle the ignition switch from off to on.
4. Wait a minimum of 50 seconds and with the scan tool, read MSMD DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Adjustable Pedals Switch. Removal
- Perform the APS VERIFICATION TEST. Verification Tests.

3. CHECK THE (Q102) ADJUSTABLE PEDALS SWITCH FORWARD CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off to the lock position.
2. Disconnect the Memory Seat Module C6 harness connector.
3. Measure the resistance between ground and the (Q102) Adjustable Pedals Switch Forward circuit at the Memory Seat Module C6 harness connector.

Is the resistance below 100k Ohms?

Yes

- Repair the (Q102) Adjustable Pedals Switch Forward circuit for a short to ground.
- Perform the APS VERIFICATION TEST. Verification Tests.

No

- Go To 4

4. CHECK THE (Q102) ADJUSTABLE PEDALS SWITCH FORWARD CIRCUIT FOR A SHORT TO THE (Q101) ADJUSTABLE PEDALS GROUND CIRCUIT
1. Measure the resistance between the (Q103) Adjustable Pedals Switch Rearward circuit and (Q101) Adjustable Pedals Switch Ground circuit at the Memory Seat Module C6 harness connector.

Is the resistance below 100k Ohms?

Yes

- Repair the (Q103) Adjustable Pedals Switch Rearward circuit for a short to the (Q101) Adjustable Pedals Switch Ground circuit.
- Perform the APS VERIFICATION TEST. Verification Tests.

No

- Replace and program the Memory Seat Module (MSMD). Memory Seat Module - Removal
- Perform the APS VERIFICATION TEST. Verification Tests.