GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2003 🢒 Montana Ext. 🢒 DTC 🢒 DTC 023

Circuit Description

The rear side door actuator control module uses the power sliding door detent switch to determine when the door is latched, ajar, or open. The power sliding door detent switch is part of the sliding door rear latch assembly. The detent switch signal circuit is supplied 12 volts through a resistor within the module. When the power sliding door is open and the door switch plate plungers have made contact with the B-pillar switch plate pads, the detent switch signal circuit is pulled to ground. When the door latch makes contact with the striker and the latch moves to the ajar position, the detent switch signal circuit opens. As the door latch passes from the ajar position to the latched position the detent switch signal circuit is briefly pulled to ground.

Conditions for Setting the DTC

The rear side door actuator control module does not detect the detent switch signal pulled low between the primary latched and ajar positions while attempting to power open or close.

Action Taken When the DTC Sets

The rear side door actuator control module sets DTC 23.

Conditions for Clearing the DTC

All stored DTCs are cleared whenever the on-board diagnostic modes are exited.

Diagnostic Aids

Inspect the door lock switch plate plungers and pads for the following conditions:

    • Proper door plunger operation.
    • Clean electrical contact from the door plungers to the B-pillar contacts.
    • Proper alignment of the door plungers to the B-pillar contacts.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Tests for a short to ground in the detent switch circuit from the B-pillar to the module.

    2.

  2. Tests the detent switch open position for continuity to ground.

    3.

  3. Tests the detent switch ajar position.

    4.

  4. Tests the detent switch for continuity to ground between the ajar and latch positions.

    5.

  5. Tests the detent switch signal circuit from the B-pillar to the module for continuity.

Step

Action

Yes

No

Schematic Reference: Sliding Door Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Power Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Enter the on-board diagnostic mode 2. Refer to On-Board Diagnostic Features .
  2. Open the power sliding door.

Does the sliding door alarm sound continuously?

Go to Step 6

Go to Step 3

3

Position the door partially open where the door lock switch plate plungers and pads first make contact.

Does the sliding door alarm sound continuously?

Go to Step 4

Go to Step 7

4

Slowly pull the power sliding door closed to the latch ajar position.

Does the sliding door alarm turn off?

Go to Step 5

Go to Step 11

5

Slowly press the power sliding door to the closed/latched position.

Does the sliding door alarm sound a short tone as the door latches?

Go to Step 14

Go to Step 13

6

Test the detent switch signal circuit from the B-pillar switch plate pads to the rear side door actuator control module for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 14

7

  1. Open the power sliding door.
  2. Short the detent switch signal circuit to ground from the B-pillar switch plate pads.

Does the sliding door alarm sound continuously?

Go to Step 8

Go to Step 10

8

Test the ground circuit from the B-pillar switch plate pads for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 9

9

Test the detent switch signal and ground circuits from the sliding door switch plate plungers to the rear latch detent switch connector for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 12

10

Test the detent switch signal circuit from the B-pillar switch plate pads to the rear side door actuator control module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 14

11

Test the detent switch signal circuit from the sliding door switch plate plungers to the detent switch connector for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 13

12

Inspect for poor connections at the rear latch detent switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 13

13

Replace the rear latch detent switch. Refer to Power Sliding Door Rear Latch Detent Switch Replacement .

Is the repair complete?

Go to Step 16

--

14

Inspect for poor connections at the rear side door actuator control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 15

15

Replace the rear side door actuator control module. Refer to Rear Side Door Actuator Control Module Replacement .

Is the repair complete?

Go to Step 16

--

16

Re-initialize the power sliding door and operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2