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These new devices are all computer controlled.You should scan the vehicles body computer & check for failure codes.I am sending some info to assist you.

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2000 Pontiac Montana | Montana, Silhoutte, Trans Sport, Venture (VIN U) Service Manual | Body and Accessories | Doors | Diagnostic Information and Procedures | Document ID: 601718

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Power Sliding Door (PSD) Diagnostic Information

Power Sliding Door (PSD)

The Power Sliding Door (PSD) provides built-in diagnostics. This assists the service technicians during troubleshooting.

The PSD has the following diagnostic capabilities:

•	Diagnostic Trouble Codes (DTCs)

•	Input/output tests

Diagnostic Approach

In order to reduce diagnosis time and prevent unnecessary part replacement, follow these steps when performing PSD diagnostics:

1. Verify the customer's complaint.

   Become familiar with the normal operations of the PSD. Refer to Power Sliding Door (PSD) Customer Concerns for a list of the most common customer concerns.

2. Perform these preliminary inspections:

   •	Conduct a thorough visual inspection.

   •	Review the vehicle's service history.

   •	Detect any unusual sounds during the PSD operation.

3. Perform the PSD Diagnostic System Check. Refer to Power Sliding Door (PSD) Diagnostic System Check .

   The PSD Diagnostic System Check performs a complete test of the PSD and leads the technician through an organized diagnostic approach that includes the following aspects:

   •	Reads Diagnostic Trouble Code (DTCs) stored in memory.

   •	Follow the designated DTC tables exactly in order to make an effective repair.

   •	Finds symptoms with no DTCs.

   •	Follow the symptom tables exactly in order to make an effective repair.

4. Check for service bulletins, videos and newsletters.
5. Diagnose a symptom with no published diagnostics. Analyze the complaint then develop a plan for the diagnostics utilizing the wiring diagrams and the theory of operation.

After isolating the cause of the malfunction make the necessary repairs. When the repairs are complete, confirm that the malfunction has been corrected successfully by repeating the Power Sliding Door (PSD) Diagnostic System Check .

Fixing Intermittent Malfunctions

As with most electronic systems, intermittent malfunctions may be difficult to diagnose. Most intermittent malfunctions are caused by faulty electrical connections or wiring. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems for a detailed explanation of how to locate and repair intermittent conditions.

Keep in mind the following tips when diagnosing intermittent malfunctions:

1. Review the DTCs stored.
2. Inspect the service bulletins for similar cases where repair history may be available.
3. Evaluate the symptoms and conditions described by the customer.
4. Use a check sheet or another method in order to identify the circuit or electrical system component.
5. Follow the suggestions in diagnostic aids.
6. Verify the complaint under the conditions described by the customer.
7. Determine whether the condition described by the customer is normal and not related to a PSD malfunction. Verify the complaint against another vehicle that is operating normally.

Self-Diagnostics

The PSD contains sophisticated on-board diagnostics designed to identify the source of any PSD malfunctions, including whether or not the malfunction is intermittent. The PSD installed on domestic vehicles have seven Diagnostic Trouble Codes (DTCs) and 3 diagnostic modes.

Reading Diagnostic Trouble Codes (DTCs)

Refer to Diagnostic Modes within Power Sliding Door Diagnostic Information for more information on how to read PSD DTCs.

Clearing Diagnostic Trouble Codes (DTCs)

Diagnostic Trouble Codes (DTCs) in the rear side door actuator control module clear when the following actions occur:

•	Exiting diagnostics.

Refer to How to Exit Diagnostics within Power Sliding Door Diagnostic Information.

•	After reinstalling or replacing the radio fuse.

•	After reconnecting the vehicle battery.

•	After recharging the vehicle battery.

Diagnostic Modes

The PSD has 3 diagnostic modes:

•	Diagnostic Mode 1: Reads Diagnostic Trouble Codes (DTCs)

•	Diagnostic Mode 2: Inspects PSD inputs.

•	Diagnostic Mode 3: Performs a test of the power sliding door unlatch actuator.

How to Enter Diagnostics

Entering PSD diagnostics is done by gaining entry into Diagnostic Mode 1. Refer to How to Enter Diagnostic Mode 1 within Power Sliding Door Diagnostic Information.

Diagnostic Mode 2 may only be entered from Diagnostic Mode 1 after it has been performed. Refer to How to Enter Diagnostic Mode 2 from Diagnostic Mode 1 within Power Sliding Door Diagnostic Information.

Diagnostic Mode 3 may only be entered from Diagnostic Mode 2 after it has been performed. Refer to How to Enter Diagnostic Mode 3 from Diagnostic Mode 2 within Power Sliding Door Diagnostic Information.

The diagnostic modes can only be entered in order.

How to Enter Diagnostic Mode 1

Diagnostic Mode 1 sounds the DTCs through the rear sliding door alarm. Enter Diagnostic Mode 1 by performing the following procedure:

1. Turn off the power sliding door on/off switch (located on the interior lamp and multi-function switch).
2. Close the sliding door manually. Ensure that the PSD is in the latched position.
3. Press and hold the power sliding door open/close switch in the overhead console (located on the interior lamp and multi-function switch).
4. While holding the power sliding door open/close switch, quickly cycle power sliding door on/off switch until Diagnostic Mode 1 is entered (a minimum of 10 cycles). The power sliding door alarm will sound for 3.2 seconds upon entering Diagnostic Mode 1.
5. After entering Diagnostic Mode 1, leave the power sliding door on/off switch on.
6. Release the power sliding door open/close switch.

Upon entering Diagnostic Mode 1, the following actions occur:

•	The rear sliding door alarm sounds for 3.2 seconds.

This indicates that the Diagnostic Mode 1 is active.

•	The rear side door actuator control module sounds any DTCs stored.

•	A DTC consists of a 2 digit code.

For example, DTC 12 has the following sequence: buzz, pause, buzz, buzz, long pause. Then repeats the DTC.

•	The rear side door actuator control module repeats the same DTC 3 times before proceeding to the next DTC.

•	The rear side actuator control module sounds DTC 12 when no faults are present.

•	DTCs will continue to sound until there is an exit from diagnostics or going into Diagnostic Mode 2.

•	Write down all DTCs stored. The rear side door actuator control module erases DTCs upon exiting of the diagnostics.

If you want to exit diagnostics after Diagnostic Mode 1 has been completed, refer to How to Exit Diagnostics within Power Sliding Door Diagnostic Information. If you want to perform Diagnostic Mode 2, do not exit Diagnostic Mode 1. Refer to How to Enter Diagnostic Mode 2 within Power Sliding Door Diagnostic Information for the procedure.

Power Sliding Door DTC Descriptions

DTC	Description
12	No Diagnostic Trouble Codes Found, System OK
13	Door Position Fault
14	Controller Malfunction
22	Door Motion Error Sensed On Actuation
23	No Latch Input
24	Vehicle Speed Signal Circuit Open
32	Vehicle Speed Signal Circuit Shorted to Ground

Important: If any DTCs are stored in memory (except DTC 12), refer to the appropriate DTC table for diagnosis.

How to Enter Diagnostic Mode 2

Diagnostic Mode 2 inspects the integrity of the following inputs:

•	The power sliding door on/off switch.

•	The power sliding door open/close switch (overhead console).

•	The power sliding door open/close switch (right B-pillar).

•	The keyless entry system transmitter PSD open/close command.

•	The PARK position of the transaxle range switch.

•	The PSD detent switch.

•	The ignition position for regular wheel base only.

Enter Diagnostic Mode 2 by performing the following procedure:

1. Ensure that the PSD is in Diagnostic Mode 1.

   Refer to How to Enter Diagnostic Mode 1 within Power Sliding Door Diagnostic Information.

2. Press and hold the power sliding door open/close switch (the overhead console or the right B-pillar) for 4 seconds.

   The rear sliding door alarm sounds for 3.2 seconds twice, indicating that Diagnostic Mode 2 is active.

3. Release the power sliding door open/close switch.

Important: When checking the detent switch circuit, the PSD alarm will sound for detent switch at ground potential, and will not sound if circuit is not at ground potential. It will not toggle with activation of other inputs.

During the Diagnostic Mode 2, the rear sliding door alarm toggles between on and off upon the activation of the following inputs:

1. Shifting the transaxle in and out of PARK.
2. Pressing the PSD open/close button on the keyless entry transmitter.
3. Cycling the ignition switch.
4. Cycling the power sliding door open/close switch (right B-pillar).

   Do not hold the open/close switch for more than 4 seconds because you will enter Diagnostic Mode 3.

5. Inspect the PSD detent switch with the following procedure:

   •	Slightly pull the sliding door handle with the sliding door closed, unlocked and the child lock disengaged.

   •	The rear sliding door alarm toggles on and off when pulling the door handle.

   •	Open the sliding door manually past the ajar position (secondary latch).

   •	The rear sliding door alarm toggles on and off for as long as the sliding door remains open and the right door lock switch plate plungers and pads are in contact.

   •	Move the sliding door manually from the open to the ajar position.

   •	The rear sliding door alarm toggles on and off when the sliding door is in the ajar position.

   •	Move the sliding door manually from the ajar position to the closed (primary latch) position.

   •	The rear sliding door alarm toggles on and off when the sliding door moves between the ajar and the closed positions.

If the rear sliding door alarm does not sound upon the activation of one of these inputs, this indicates a faulty switch or a faulty circuit from that device to the rear side door actuator control module.

If you want to exit diagnostics after Diagnostic Mode 2 has been completed, refer to How to Exit Diagnostics within Power Sliding Door Diagnostic Information.

If you want to perform the Diagnostic Mode 3, do not exit Diagnostic Mode 2; refer to How to Enter Diagnostic Mode 3 within Power Sliding Door Diagnostic Information for the procedure.

How to Enter Diagnostic Mode 3

Diagnostic Mode 3 tests the power sliding door unlatch actuator.

Enter Diagnostic Mode 3 by performing the following procedure:

1. Ensure that the PSD is in Diagnostic Mode 2.

   If not, refer to How to Enter Diagnostic Mode 2 within Power Sliding Door Diagnostic Information.

2. Press and hold the power sliding door open/close switch (the overhead console or the right B-pillar) for 4 seconds.

   The rear sliding door alarm will sound while holding the switch.

3. The rear sliding door alarm pauses, then sounds for 3.2 seconds 3 times indicating that the Diagnostic Mode 3 is active.
4. Release the power sliding door open/close switch after entering Diagnostic Mode 3.

In order to test the operation of the power sliding door unlatch actuator, perform the following procedure:

1. Ensure that the sliding door is closed (fully latched).
2. Ensure that the sliding door is unlocked and the child lock is disabled.
3. Press then release either power sliding door open/close switch (the overhead console or the right B-pillar).

   The rear side door actuator control module performs the following actions when you press the open/close switch:

   •	Energizes the power sliding door unlatch actuator.

   •	Briefly sounds the rear sliding door alarm.

   •	Unlatches the sliding door past the door ajar position.

Cycling (pressing and releasing) either the power sliding door open/close switch (the overhead console or the right B-pillar) again repeats the procedure as long as the right door lock switch plate plungers and pads remain in contact.

If you want to exit diagnostics after Diagnostic Mode 3 has been completed, refer to How to Exit Diagnostics within Power Sliding Door Diagnostic Information for the procedure. If you want to perform Diagnostic Mode 1, do not exit Diagnostic Mode 3; refer to How to Return to Diagnostic Mode 1 from Diagnostic Mode 3 within Power Sliding Door Diagnostic Information for the procedure.

How to Return to Diagnostic Mode 1 from Diagnostic Mode 3

Return to Diagnostic Mode 1 from Diagnostic Mode 3 by performing the following procedure:

1. Press and hold the power sliding door open/close switch (the overhead console or the right B-pillar) for 4 seconds.
2. Release the power sliding door open/close switch after entering Diagnostic Mode 1.

Important: Exiting from diagnostics will erase all DTCs.

How to Exit Diagnostics

Exit diagnostics by performing the following procedure:

1. Turn the power sliding door on/off switch off for at least 10 seconds.
2. Re-initialize the PSD.

   Refer to Power Sliding Door (PSD) Re-Initialization .

© 2008 General Motors Corporation. All rights reserved.

Expert:	John
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Answered:	2/25/2008

Master Automotive Technician

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