Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR DTC B1D57-ADJUSTABLE PEDAL SENSOR CIRCUIT HIGH
NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, record and erase DTC's.

Cycle the ignition switch from off to on.

Cycle the Adjustable Pedals Switch forward and rearward.

With the scan tool, read DTC's

Does the scan tool display: B1D57-ADJUSTABLE PEDAL SENSOR CIRCUIT HIGH?

Yes
1. Go To step 2).
No
1. Refer to APS-INTERMITTENT CONDITION .
2. Perform APS VERIFICATION TEST - VER 1 .
2) CHECK CONNECTOR/TERMINAL FOR DAMAGE
NOTE: Check all terminals for broken, bent, pushed out, or corroded terminals.

Turn the ignition off.

Inspect the Memory Seat Module harness connector and the Adjustable Pedal Motor harness connector.

Is there any connector or terminal damaged?

Yes
1. Repair as necessary.
2. Perform APS VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) CHECK ADJUSTABLE PEDALS SENSOR SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

Fig 1: Checking Adjustable Pedals Sensor Supply Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Memory Seat Module harness connector.

Disconnect the Adjustable Pedal Motor harness connector.

Turn the ignition on.

Measure the voltage between the Adjustable Pedals Sensor Supply circuit and ground.

Is voltage present?

Yes
1. Repair the Adjustable Pedals Sensor Supply circuit for a short to voltage.
2. Perform APS VERIFICATION TEST - VER 1 .
No
1. Go To step 4).
4) CHECK ADJUSTABLE PEDALS SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Checking Adjustable Pedals Sensor Signal Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure the voltage between the Adjustable Pedals Sensor Signal circuit and ground.

Is voltage present?

Yes
1. Repair the Adjustable Pedals Sensor Signal circuit for a short to voltage.
2. Perform APS VERIFICATION TEST - VER 1 .
No
1. Go To step 5).
5) ADJUSTABLE PEDAL SENSOR SIGNAL SHORTED TO SENSOR SUPPLY

Fig 3: Checking Adjustable Pedals Sensor Signal & Supply Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance between the Adjustable Pedals Sensor Signal circuit and the Sensor Supply circuit.

Is the resistance below 100 ohms?

Yes
1. Repair the Adjustable Pedals Sensor Signal circuit for a short to the Sensor Supply circuit.
2. Perform APS VERIFICATION TEST - VER 1 .
No
1. Go To step 6).
6) ADJUSTABLE PEDALS SENSOR RETURN CIRCUIT OPEN

Fig 4: Checking Adjustable Pedals Sensor Return Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance of the Adjustable Pedals Sensor Return circuit between the Memory Seat Module harness connector and the Adjustable Pedal Motor harness connector.

Is the resistance below 5 ohms?

Yes
1. Go To step 7).
No
1. Repair the Adjustable Pedals Sensor Ground circuit for an open.
2. Perform APS VERIFICATION TEST - VER 1 .
7) CHECK ADJUSTABLE PEDALS SENSOR SIGNAL CIRCUIT VOLTAGE
Turn the ignition off.

Reconnect all connectors.

Turn the ignition on.

Measure the voltage of the Adjustable Pedals Sensor Signal circuit in the Memory Seat Module harness connector.

Is the voltage below 4.0 volts?

Yes
1. Replace and reprogram the Memory Seat Module in accordance with the Service Information.
2. Perform APS VERIFICATION TEST - VER 1 .
No
1. Replace the Adjustable Pedals Sensor in accordance with the Service Information.
2. Perform APS VERIFICATION TEST - VER 1 .