• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
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 |
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.
The MSM must be powered.
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.
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.
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.
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.
Memory recall functions will be suspended.
• | The current DTC will become a history DTC when the fault is no longer present and the ignition has been cycled. |
• | The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred. |
The MSM may be referenced as the driver position module.
Adjustable Pedals Description and Operation
Control Module References for scan tool information
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.
• | 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. |
• | 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. |
• | Terminal 13 (LHD) |
• | Terminal 7 (RHD) |
• | Terminal 16 (LHD) |
• | Terminal 17 (RHD) |
⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | 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. |
⇒ | If the circuits test normal, test or replace the adjustable brake pedal assembly. |
⇒ | If other adjustable pedal DTCs are set, diagnosis those DTCs first. |
• | Terminals 11 and 12 (LHD) |
• | Terminal 12 and 13 (RHD) |
⇒ | 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. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for the MSM replacement, setup, and programming |