Diagnostic Instructions

DTC Descriptors

DTC B3606 01: Adjustable Foot Pedal Position Sensor Circuit Short to Battery

DTC B3606 06: Adjustable Foot Pedal Position Sensor Circuit Short to Ground or Open

DTC B3606 5A: Adjustable Foot Pedal Position Sensor Plausibility Failure

DTC B3606 61: Adjustable Foot Pedal Position Actuator Stuck

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5-Volt Reference	B1395 02, B1825 06, B1850 06, B2355 06, B2365 06, B2375 06, B3606 06, B3633 06	B3606 06	B1395 05, B1825 01, B1850 01, B2355 01, B2365 01, B2375 01, B3606 01, B3633 01	B3606 5A
Adjustable Accelerator Pedal Position Sensor Signal	B3633 06	B3633 06	B3633 01	B3633 5A
Adjustable Brake Pedal Position Sensor Signal	B3606 06	B3606 06	B3606 01	B3633 5A
Adjustable Pedals Motor Forward Control	B3920 02	B3606 61	B3920 01	B3606 5A
Adjustable Pedals Motor Rearward Control	B3920 02	B3606 61	B3920 01	B3606 5A
Memory Seat Sensor Low Reference	--	B3606 01, B3606 61, B3633 01	--	B3606 5A

Circuit/System Description

The memory seat module (MSM) monitors the location of the adjustable pedals using the accelerator pedal position sensor and the brake pedal position sensor. The adjustable pedals position sensors are supplied with 5-volt reference and ground circuits from the MSM. The position sensor signal circuits are referenced from ground within the MSM. The signal voltage monitored by the module ranges from 0.22-4.75 volts and is determined by the wiper location on the resistor within the position sensor.

Conditions for Running the DTC

The MSM must be powered.

Conditions for Setting the DTC

B3606 01

The analog input from the brake pedal position sensor is greater than 4.75 volts, the sensor will be considered out of range and the MSM will set this DTC.

B3606 06

The analog input from the brake pedal position sensor is less than 0.22 volts, the sensor will be considered out of range and the MSM will set this DTC.

B3606 5A

This DTC will set if the MSM is controlling the motor in one direction and the brake pedal position sensor is tracking the motor in the opposite direction. The sensor is either mounted or wired incorrectly, or the polarity of the motor control circuits are reversed.

B3606 61

This DTC will set, if the MSM is driving the adjustable pedal motor but does not see a voltage change from the brake pedal position sensor.

Action Taken When the DTC Sets

Memory recall functions will be suspended.

Conditions for Clearing the DTC

Diagnostic Aids

The MSM may be referenced as the driver position module.

Reference Information

Schematic Reference

Connector End View Reference

Component Connector End Views

Description and Operation

Adjustable Pedals Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Accelerator Pedal Position Sensor and Brake Pedal Position Sensor parameters. The readings should be between 1.5 volts and 3.4 volts and change while adjusting the pedals position.

Circuit/System Testing

B3606 01 and B3606 06

1. Ignition OFF, disconnect the X207 (LHD) or X203 (RHD) inline harness connector.
2. Ignition OFF, test for less than 7 ohms between the low reference circuit terminal listed below and ground:

•	Terminal 2 (LHD)

•	Terminal 4 (RHD)

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal listed below and ground:

•	Terminal 13 (LHD)

•	Terminal 7 (RHD)

⇒	If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.

⇒	If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.

4. Ignition OFF, remove the 5-volt reference circuit terminal listed below from the MSM side of the connector:

•	Terminal 13 (LHD)

•	Terminal 7 (RHD)

5. Disconnect the X206 (LHD) or X201 (RHD) inline harness connector.
6. Remove the position sensor signal circuit terminal listed below from the MSM side of the connector:

•	Terminal 16 (LHD)

•	Terminal 17 (RHD)

7. Connect the inline harness connectors.
8. Ignition ON, verify the scan tool Adjustable Brake Pedal Sensor parameter is less than 0.45 volts.

⇒	If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.

9. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool Adjustable Brake Pedal Sensor parameter is greater than 4.75 volts.

⇒	If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.

10. Test the brake pedal position sensor circuits between the inline harness connector and the sensor for an open/high resistance, a short to ground, or a short to voltage.

⇒	If the circuits test normal, test or replace the adjustable brake pedal assembly.

B3606 61

1. Ignition ON, verify that no other adjustable pedal DTCs are set.

⇒	If other adjustable pedal DTCs are set, diagnosis those DTCs first.

2. Ignition OFF, disconnect the X207 (LHD) or X203 (RHD) inline harness connector.
3. Remove the motor control circuits terminal 11 and terminal 12 from the MSM side of the connector.
4. Ignition OFF, remove the motor control circuit terminals listed below from the MSM side of the connector:

•	Terminals 11 and 12 (LHD)

•	Terminal 12 and 13 (RHD)

5. Connect the inline harness connector.
6. Connect a test lamp between the motor control circuits.
7. Ignition ON, verify that a test lamp illuminates while pressing the adjustable pedals switch in both directions.

⇒	If the test lamp does not illuminate, test the motor control circuits for an open/high resistance. If the circuits test normal replace the MSM.

8. Test the motor control circuits between the inline harness connector and the adjustable pedal motor for an open/high resistance.
9. If all circuits test normal, test or replace the adjustable pedal motor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.