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.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Power Sliding Door Module B+

B1420

B1420

--

--

Left/Right Sliding Door Open/Close Switch Signal

2

2

2

--

Left/Right Door Enable Switch Signal

1, 2

--

2

--

Left/Right Sliding Door Latch Motor Control

1

1

1

--

Park/Neutral Position Park Signal

1

1

1

--

Left/Right Sliding Door Clutch Control

B1292, B1293, B1294

B1292, B1293, B1294

B1293

--

Left/Right Sliding Door Motor Open Control

B1292

B1292

B1292

--

Left/Right Sliding Door Motor Close Control

B1292

B1292

B1292

--

Left/Right Sliding Door Detent Switch Signal

1

B1294

1

--

Left/Right Sliding Door Unlatch Actuator Control

B3260

B3260

1

--

Left/Right Sliding Door Sensor Voltage Reference

1

B1395

1

--

Left/Right Sliding Door Sensor Low Reference

1

B1395

1

--

Left/Right Sliding Door Sensor 1 Signal

1

B3250

1

--

Left/Right Sliding Door Sensor 2 Signal

1

B3250

1

--

Left/Right Sliding Door Clutch Ground

--

B1292, B1293, B1294

1

--

Left/Right Sliding Door Unlatch Actuator Ground

--

B3260

1

--

PSDM Ground

--

1

1

--

1. Power Sliding Door Malfunction

2. Power Sliding Door Open/Close Switch Inoperative

Circuit/System Description

As a safety feature, the power sliding door module (PSDM) monitors the Park/Neutral Position Park Signal from the body control module (BCM), this prevents the opening of the power sliding door in all gear selections other than Park. If the power sliding door is open or in the process of closing when shifted out of Park (P), a chime will sound. This is a warning that the sliding door is not completely closed. Also, the Driver Information Center (DIC) will indicate if the door is open.

Reference Information

Schematic Reference

Sliding Door Schematics

Connector End View Reference

Power Door Systems Connector End Views

Description and Operation

Power Sliding Door (PSD) Description and Operation

Electrical Information Reference

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

Scan Tool Reference

    •  Scan Tool Data List
    •  Scan Tool Data Definitions
    •  Scan Tool Output Controls

Circuit/System Verification

  1. Ignition ON, transaxle in Park, unlock all doors and command the appropriate power sliding door to open by pressing the open/close switch on the overhead console multifunction switch. The power sliding door should open as commanded.
  2. Observe the scan tool Vehicle In Park parameter while moving the shifter selector from Park to Drive, the parameter should change from Yes to No.

Circuit/System Testing

  1. Ignition ON, shift the transaxle into Drive, verify the scan tool Vehicle in Park parameter is No.
  2. If not the specified parameter, test the park/neutral position park signal circuit terminal 3 for a short to ground or short to voltage. If the circuit tests normal, replace the BCM.
  3. If all circuits test normal, replace the appropriate PSDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM and PSDM replacement, setup and programming.