GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • 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.

DTC Descriptors

DTC B3604 01: Adjustable Foot Pedal Forward Switch Circuit Short to Battery

DTC B3605 01: Adjustable Foot Pedal Rearward Switch Circuit Short to Battery

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Switch Reference Voltage

1

1

--

--

Forward Switch Signal

2

2

B3604 01

--

Rearward Switch Signal

3

3

B3605 01

--

1. Adjustable Pedals Inoperative

2. Adjustable Pedals Forward Inoperative

3. Adjustable Pedals Rearward Inoperative

Circuit/System Description

The adjustable pedals forward and rearward switches are inputs to the memory seat module. The memory seat module supplies the switch assembly with a battery positive reference voltage. When the switch is operated to the forward or rearward direction, battery positive voltage is applied to the forward or rearward switch signal inputs.

Conditions for Running the DTC

System voltage to the memory seat module must be 9-16 volts.

Conditions for Setting the DTC

The forward and rearward switch signal circuits are active at the same time.

Action Taken When the DTC Sets

The adjustable pedals will be disabled.

Conditions for Clearing the DTC

The fault is no longer present.

Reference Information

Schematic Reference

Adjustable Pedal Schematics

Connector End View Reference

Adjustable Pedal Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Testing

  1. Disconnect the adjustable pedal switch connector.
  2. Ignition ON, verify that both adjustable pedal switch parameters to the memory seat module are Inactive.
  3. If 1 of the switch parameters is always Active test the affected switch signal circuit for a short to voltage. If the signal circuit tests normal replace the memory seat module.
  4. If the circuit tests normal replace the adjustable pedal switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the memory seat module replacement and setup procedures