B3617

DTC B3617

CIRCUIT DESCRIPTION
The memory seat module monitors the locations of the adjustable pedals using position sensors mounted to the brake and accelerator pedal actuators. The position sensors are supplied with a 5-volt reference and ground circuits from the memory seat module. The position sensor signal circuits are referenced from ground within the memory seat module. The signal voltages monitored by the memory seat module range from 0.25-4.75 volts and are determined by the wiper locations on the resistors within the position sensors. The position sensor signal circuit voltage levels are used by the memory seat module to determine the positions of the adjustable pedals when storing or recalling memory position settings. The memory seat module also monitors the locations of both pedal assemblies in order to prevent a step over condition from occurring. During manual or memory operation the position sensor inputs to the memory seat module must remain within 0.6 volts or 31 counts of each other. During a calibration procedure the position sensor inputs must not vary more than 0.3 volts or 23 counts.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3617 Adjustable Foot Pedal Position Sensor Circuit

CONDITIONS FOR RUNNING THE DTC
The system voltage must be between 9.0-16.0 volts.

CONDITIONS FOR SETTING THE DTC
The memory seat module determines that a step over condition between the brake and accelerator pedals may exist.
- During manual or memory operation the difference between the brake and accelerator pedal position sensor signals is greater than 31 counts.
- During an attempted calibration procedure the difference between the brake and accelerator pedal position sensor signals is greater than 23 counts.

ACTION TAKEN WHEN THE DTC SETS
The adjustable pedals system will be disabled.

CONDITIONS FOR CLEARING THE DTC
This DTC will remain current until it is cleared, and may only be cleared by using the scan tool clearing DTCs feature.

DIAGNOSTIC AIDS
- Inspect for poor connections at the position sensor electrical connectors.
- Inspect the drive cables for damage and proper connections at the adjuster motor and pedal actuators.
- Inspect the position sensors and pedal actuators for obvious damage which may cause the condition.

TEST DESCRIPTION

Steps 1 - 12:

The numbers below refer to the step numbers on the diagnostic table.
3. Verify that both pedal assemblies are in proper mechanical working order.
4. Verify that both position sensors are in proper mechanical working order.
6. Attempt to manually synchronize the pedal assemblies to within acceptable limits.