GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Terraza - 4WD 🢒 DTC 🢒 DTC B1292, B1293, or B1294

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

DTC Descriptors

DTC B1292: Power Sliding Door Motor Control Circuit

DTC B1293: Power Sliding Door Clutch Control Circuit

DTC B1294: Power Sliding Door Detent Switch Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Power Sliding Door Module B+

B1292, B1395

B1292, B1395

--

--

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

--

--

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 Sensor Voltage Reference

1

B1395

1

--

Left/Right Sliding Door Sensor Low Reference

1

B1395

1

--

Left/Right Sliding Door Sensor 1 Signal

1

B1395

1

--

Left/Right Sliding Door Sensor 2 Signal

1

B1395

1

--

Left/Right Sliding Door Clutch Ground

--

B1292, B1293, B1294

1

--

PSDM Ground

--

1

1

--

1. Power Sliding Door Malfunction

2. Power Sliding Door Open/Close Switch Inoperative

Circuit/System Description

The power sliding door control module (PSDM) supplies the power and ground to operate the power sliding door motor and clutch. The direction of the motor rotation is determined by which of the control circuits is supplied 12V and which is grounded. The PSDM varies the current flow through the motor ground circuit to control the speed of the motor as necessary. The clutch enables the power sliding door to be operated manually when de-energized, or by the motor when energized.

Conditions for Running the DTC

Battery voltage must be between 9-16V.

Conditions for Setting the DTC

B1292

    • An open/high resistance in the B+ circuit terminal 14
    • The PSDM detects a fault in the left/right sliding door motor open control or left/right sliding door motor close control circuit.

B1293 or B1293, B1294 or B1292, B1293, B1294

The PSDM detects a fault in the left/right sliding door clutch control

B1294

    • The PSDM detects an open/high resistance in the sliding door detent switch signal circuit for greater than 0.3 seconds
    • The DTC will set in history only on power close when PSDM detects an obstacle after Pad/Plunger contact detected without seeing the detent switch become active.

Action Taken When the DTC Sets

B1292

The power sliding door will be inoperative in the power mode

B1293 or B1293, B1294 or B1292, B1293, B1294

The power sliding door will be inoperative from the power mode and may be difficult to latch while closing in the manual mode.

B1294

    • The power sliding door will unlatch but not open, motor may continue to run for up to 3 seconds and may be difficult to latch while closing in the manual mode
    • The power sliding door will close and immediately re-open and may set B3260 after repeated attempts to close.

Conditions for Clearing the DTC
    • The DTC will be current for as long as the fault is present.
    • When the fault is no longer present, the DTC will be a history DTC.
    • A history DTC will clear after 50 ignition cycles.

Diagnostic Aids

DTC B1292, B1293, B1294, B1395, B1420, B3250, B3260 or any combination of these DTCs may be set due to an overcinch condition in which the sliding door motor may continue to run for up to 3 seconds after the door is fully closed. Reference any power sliding door overcinching bulletins first before performing any extensive power sliding door diagnostics.

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 Definitions
    •  Scan Tool Data List
    •  Scan Tool Output Controls

Circuit/System Verification
  1. Ignition ON, observe the scan tool PSD Detent Switch parameter while manually opening and closing the power sliding door. The parameter should change from Active to Inactive.
    2. ⇒If the value does not change, refer to Sliding Door Detent Switch Malfunction.
  2. Command the power sliding door to OPEN and CLOSE with a scan tool. The power sliding door should perform the OPEN and CLOSE function.
    3. ⇒If the power sliding door malfunctions, refer to Power Sliding Door Malfunction.

Circuit/System Testing

Sliding Door Detent Switch Malfunction

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate door contact plate.
  2. Test for less than 1.0 ohm between the ground circuit terminal C and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool PSD Detent Switch parameter is Inactive.
    4. ⇒If not the specified value, test the signal circuit terminal E for a short to ground. If the circuit tests normal, replace the PSDM.
  4. Install a 3A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool PSD Detent Switch parameter is Active.
    5. ⇒If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PSDM.
  5. Ignition OFF, connect the C1 harness connector at the door contact plate. Close the door and disconnect the harness connector at sliding door detent switch.
  6. Test for less than 1.0 ohm between the ground circuit terminal B and ground.
    7. ⇒If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door contact plate.
  7. Ignition ON, verify the scan tool PSD Detent Switch parameter is Inactive.
    8. ⇒If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the door contact plate.
  8. Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool PSD Detent Switch parameter is Active.
    9. ⇒If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door contact plate.
  9. If all circuits test normal, test or replace the sliding door detent switch.

Power Sliding Door Malfunction

  1. Ignition OFF, disconnect the C1 harness connector at the appropriate PSDM.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 14 and ground
    3. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the C1 harness connector and disconnect the C460 inline harness connector.
  4. Connect a test lamp between the control circuit terminal A and the control circuit terminal B.
  5. Ignition ON, manually open the sliding door to the mid travel position and command the power sliding door to OPEN and CLOSE with a scan tool. The test lamp should illuminate when commanding the OPEN and CLOSE states.
    6. ⇒If the test lamp remains OFF during either of the commands, test either control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the PSDM.
  6. Ignition OFF, connect the C460 inline harness connector and disconnect the C2 harness connector.
  7. Connect a test lamp between the control terminal 7 and the ground terminal 14 at the PSDM.
  8. Ignition ON, manually open the sliding door to the mid travel position and command the power sliding door to OPEN and CLOSE with a scan tool. The test lamp should illuminate when commanding the OPEN and CLOSE states.
    9. ⇒If the test lamp always OFF during the OPEN or CLOSE command, replace the PSDM.
  9. If all circuits test normal, test or replace the sliding door motor assembly.

Component Testing

Clutch

  1. Ignition OFF, disconnect the C2 harness connector at the appropriate PSDM.
  2. Install a 15A fused jumper wire between the control circuit terminal 7 and 12V. Momentarily install a jumper wire between the ground circuit terminal 14 and ground. The clutch motor should engage.
    3. ⇒If the function does not perform as specified, replace the sliding door motor assembly.
  3. Remove the jumper wires, the clutch should disengage.
    4. ⇒If the function does not perform as specified, replace the sliding door motor assembly.

Sliding Door Detent Switch

  1. Ignition OFF, disconnect the harness connector at the appropriate sliding door detent switch.
  2. Test for infinite resistance between the signal terminal A and the ground terminal B with the switch in the open position.
    3. ⇒If not the specified value, replace the sliding door detent switch.
  3. Test for less than 2.0 ohms between the signal terminal A and the ground terminal B with the switch in the closed position.

Cable Motor

  1. Ignition OFF, disconnect the C2 harness connector at the appropriate PSDM.
  2. Install a 15A fused jumper wire between the control circuit terminal 1 and 12V. Momentarily install a jumper wire between the control circuit terminal 8 and ground. The cable motor should perform the OPEN or CLOSE function.
    3. ⇒If the function does not perform as specified, replace the sliding door motor assembly
  3. Reverse the jumper wires; the cable motor should perform the CLOSE or OPEN function.
    4. ⇒If the function does not perform as specified, replace the sliding door motor assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Sliding Door Jamb Contact Plate Replacement
    •  Power Sliding Door Unlatch Actuator Replacement
    •  Control Module References For PSDM replacement, setup and programming