Diagnostic Information and Procedures
| DTC | Description |
|---|---|
| DTC B3606 | Adjustable Foot Pedal Position Sensor Circuit |
| DTC B3607 | Adjustable Foot Pedal Motor Circuit |
DTC INDEX
Diagnostic Starting Point - Adjustable Pedals (With Memory)
Begin adjustable pedal system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information
- The identification of the control modules which command the system.
- The ability of the control modules to communicate through the serial data circuit.
- The identification of any stored DTCs and their status.
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Diagnostic Starting Point - Adjustable Pedals (W/O Memory)
Begin the adjustable pedal system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Seats in order to identify the correct procedure for diagnosing the system and where the procedure is located.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition Off | |||
| Pedal Position | Sensor Data | Volts | 0.0-5.0 |
Driver Seat Module
Circuit Description
The driver seat module (DSM) monitors the location of the adjustable pedals using the brake pedal position sensor. The brake pedal position sensor is supplied with 5-volt reference and ground circuits from the DSM. The position sensor signal circuit is referenced from ground within the DSM. The signal voltage monitored by the DSM ranges from 0.39-4.58 volts and is determined by the wiper location on the resistor within the position sensor. The position sensor circuit voltage level is used by the DSM to determine the position of the adjustable pedals when storing or recalling memory position settings.
DTC Descriptor
This diagnostic procedure supports the following DTC
DTC B3606 Adjustable Foot Pedal Position Sensor Circuit
Conditions for Running the DTC
Battery voltage to the seat module must be within 7-16 volts.
Conditions for Setting the DTC
The position sensor signal circuit voltage level to the DSM is not within the 0.39-4.58 volt range.
Action Taken When the DTC Sets
The memory recall functions will be disabled for as long as the DTC is current.
Conditions for Clearing the DTC
- The DTC will be stored as a history code when the fault is no longer present.
- A history DTC will be cleared after completing 100 consecutive ignition cycles, or by using the scan tool clearing DTCs feature.
Diagnostic Aids
If the DTC is only found in history, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
The adjustable pedal motor control circuits are controlled through the adjustable pedal relay. The adjustable pedal relay may be controlled by either the driver seat module (DSM) or the adjustable pedal switch. In an inactive state both of the relay switch contacts are closed to the ground circuit. The relay coils are energized when battery voltage is supplied through the relay control circuits by the DSM or the adjustable pedal switch. When the forward control or rearward control relay coil is energized the appropriate motor control circuit is switched to the battery voltage supply circuit contact.
This diagnostic procedure supports the following DTC
DTC B3607 Adjustable Foot Pedal Motor Circuit
Battery voltage to the seat module must be within 7-16 volts.
The DSM detects one of the following conditions on either of the adjustable pedal relay control circuits
- An open or short to voltage while the DSM output is in an inactive state
- A short to ground while the DSM output is in an active state
The adjustable pedal system will be disabled.
- The DTC will be stored as a history code when the fault is no longer present.
- A history DTC will be cleared after completing 100 consecutive ignition cycles, or by using the scan tool clearing DTCs feature.
If the DTC is only found in history, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Adjustable Pedals Schematics Connector End View Reference: Adjustable Pedals Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Install a scan tool. Display the driver seat module current DTCs. Is the DTC current? | Go to Step 4 | Go to Step 3 |
| 3 | Clear the driver seat module (DSM) history DTCs. Set a memory pedal position near the center of the pedal travel. Recall the memory pedal position from the forward stop and from the rearward stop. Does the DTC reset? | Go to Step 5 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 4 | Operate the adjustable pedal switch in both directions. Does the pedal assembly function in both directions? | Go to Step 11 | Go to Step 8 |
| 5 | Disconnect the driver seat to body harness in line connector. Operate the adjustable pedal switch in both directions. Does the pedal assembly function in both directions? | Go to Step 10 | Go to Step 6 |
| 6 | Disconnect the adjustable pedal assembly connector. Using a test lamp connected to battery voltage, probe each of the relay control circuit terminals from the adjustable pedal switch in the harness connector. Does the test lamp illuminate on either circuit? | Go to Step 14 | Go to Step 7 |
| 7 | Using a test lamp connected to battery voltage, probe each of the relay control circuit terminals from the DSM in the adjustable pedal assembly harness connector. Does the test lamp illuminate on either circuit? | Go to Step 13 | Go to Step 18 |
| 8 | Disconnect the adjustable pedal assembly connector. Using a test lamp connected to ground, probe each of the relay control circuit terminals from the adjustable pedal switch in the harness connector. Does the test lamp illuminate on either circuit? | Go to Step 11 | Go to Step 9 |
| 9 | Using a test lamp connected to ground, probe each of the relay control circuit terminals from the DSM in the adjustable pedal assembly harness connector. Does the test lamp illuminate on either circuit? | Go to Step 12 | Go to Step 15 |
| 10 | Test the relay control circuits in the driver seat harness for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 18 |
| 11 | Test the relay control circuits from the DSM for an open or short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 18 |
| 12 | Test the relay control circuits from the adjustable pedal switch for an open or short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 16 |
| 13 | Test the relay control circuits from the DSM for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 18 |
| 14 | Test the relay control circuits from the adjustable pedal switch for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 15 |
| 15 | Test the adjustable pedal relay ground circuit for an open or high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 17 |
| 16 | Inspect for poor connections at the adjustable pedal switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 19 |
| 17 | Inspect for poor connections at the adjustable pedal relay. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 20 |
| 18 | Inspect for poor connections at the DSM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 22 | Go to Step 21 |
| 19 | Replace the adjustable pedal switch. Did you complete the replacement? | Go to Step 22 | |
| 20 | Replace the adjustable pedal relay. Did you complete the replacement? | Go to Step 22 | |
| 21 | Replace the DSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 22 | |
| 22 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC B3607
Symptoms - Adjustable Pedals
| IMPORTANT | The following steps must be completed before using the symptom table. |
- If the vehicle is equipped with AAB (Memory Driver Convenience Package) perform the «Diagnostic System Check - Vehicle»(ref-200355-S37572612702005102000000) in Vehicle DTC Information, before using the symptom table in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
- Review the system operation in order to familiarize yourself with the system functions. Refer to «Adjustable Pedals Description and Operation»(ref-200354-S38762141162005102000000) .
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the adjustable pedal system. Refer to «Checking Aftermarket Accessories»(ref-200357-S14022145092005102000000) in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Symptom List
Refer to Adjustable Pedals Inoperative .