• | 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 |
---|---|---|---|---|
12-Volt Reference | 1 | 1 | -- | -- |
5-Volt Reference | B3606 01 | B3606 06 | B3606 06 | -- |
Position Sensor Signal | B3606 06 | B3606 06 | B3606 06 | -- |
Forward Switch Signal | 2 | 2 | B3604 01 | -- |
Rearward Switch Signal | 3 | 3 | B3605 01 | -- |
Motor Control A | 1 | 1 | 1 | -- |
Motor Control B | 1 | 1 | 1 | -- |
Low Reference | -- | B3606 06 | -- | -- |
1. Adjustable Pedals Inoperative 2. Adjustable Pedals Forward Inoperative 3. Adjustable Pedals Rearward Inoperative |
The adjustable pedals assembly is moved forward or backward by a motor which is fixed to the brake pedal actuator with a drive cable to the accelerator pedal actuator. The memory seat module (MSM) controls the adjustable pedals motor by applying battery voltage to one of the outputs and ground to the other. The adjustable pedals motor is bidirectional and the direction of the pedal assembly travel is determined by which of the motor control circuits is switched to battery positive voltage while the other is grounded. The adjustable pedals forward and rearward switches are inputs to the MSM. The MSM supplies the switch assembly with a 12-volt reference. When the switch is operated to the forward or rearward direction, battery positive voltage is applied to the forward or rearward switch signal inputs.
Adjustable Pedals Description and Operation
Control Module References for scan tool information
⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
⇒ | If the parameters do not change between the specified values, refer to Adjustable Pedal Switch Circuit Malfunction. |
⇒ | If not within the specified range, refer to Adjustable Pedal Position Sensor Circuit Malfunction. |
⇒ | If the pedals do not move in the commanded direction, refer to Adjustable Pedal Motor Circuit Malfunction. |
• | X88/Z88 - terminal 11 |
• | Z75 - terminal 5 |
⇒ | If greater than the specified range, test the 12-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM. |
• | X88/Z88 - terminal 12 |
• | Z75 - terminal 6 |
⇒ | If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM. |
• | X88/Z88 - terminal 10 |
• | Z75 - terminal 4 |
• | X88/Z88 - terminal 12 |
• | Z75 - terminal 6 |
⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
• | X88/Z88 - terminal 10 |
• | Z75 - terminal 4 |
⇒ | If not the specified value, test the signal 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 low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | 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. |
⇒ | If greater than the specified range, test the signal circuit terminal 2 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 test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
• | Control circuit terminal 4 |
• | Control circuit terminal 5 |
⇒ | If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If the test lamp does not illuminate, replace the MSM. |
Perform Diagnostic Repair Verification the after completing the diagnostic procedure.
• | Control Module References for MSM replacement, setup, and programming |
• | 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 |
---|---|---|---|---|
Park Enable Relay B+ | 2 | 2 | -- | -- |
Adjustable Pedal Switch B+ | 2 | 2 | -- | -- |
Forward Control | 2 | 2 | 2 | -- |
Rearward Control | 2 | 2 | 2 | -- |
Motor Control A | 2 | 2 | 2 | -- |
Motor Control B | 2 | 2 | 2 | -- |
Park Enable Relay Control | B3631 00 | 1 | 2 | -- |
Park Enable Relay Ground | -- | 1 | -- | -- |
1. Adjustable Pedal Inhibit Inoperative 2. Adjustable Pedals Inoperative |
Voltage to the adjustable pedal switch is supplied through the park enable relay while in a de-energized state. The park enable relay is controlled by the body control module (BCM) through a high side drive control circuit and will be energized whenever the ignition is in the accessory, run, or crank positions and the transmission is in reverse or the cruise control is engaged. The adjustable pedals switch controls the adjustable pedals relay by applying battery voltage to one of the coils. In an inactive state both of the relay switch contacts are closed to ground and when one of the relay coils is energized its switch contact is closed to battery voltage.
Adjustable Pedals Description and Operation
Control Module References for scan tool information
⇒ | If the DTC is set, refer to DTC B3631. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the circuit fuse is open, test the motor control circuits and the switch control circuits for a short to ground. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the left IP junction block. |
• | Control circuit terminal E1 |
• | Control circuit terminal G1 |
⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the adjustable pedal switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the adjustable pedal switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the adjustable pedal switch. |
• | Control circuit terminal 4 |
• | Control circuit terminal 5 |
⇒ | If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, replace the left IP junction block. |
• | Control circuit terminal 4 |
• | Control circuit terminal 5 |
⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the left IP junction block. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground. If the circuit tests normal, replace the left IP junction block. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground. If the circuit tests normal, replace the left IP junction block. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |