GM Service Manual Online
For 1990-2009 cars only

Object Number: 323699  Size: LF
Power Door Systems Components
PSD GENI, GENII Schematic
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Ground Distribution Schematics
Interior Lights Dimming Schematics

Circuit Description

The Power Sliding Door (PSD) operates through three switches installed on the vehicle, and via the keyless entry transmitter.

When the B-pillar PSD open/close switch is pressed, the PSD open/close switch sends a ground signal to the rear side door actuator control module through CKT 1894. This action causes the PSD to either open or close (depending on the position of the door) as long as the power sliding door is unlocked, the transaxle is in PARK (for open command only), and no Diagnostic Trouble Codes (DTCs) are present.

Diagnostic Aids

    • Inspect for the following conditions:
       - A faulty right B-pillar PSD open/close switch with the internal contacts always open
       - An open in CKT 1894
       - An open in CKT 650
    • An intermittent failure may be difficult to detect and to accurately diagnose. Faulty electrical connections or wiring causes most intermittent problems. When an intermittent condition is suspected, inspect the suspected circuits for the following conditions:
       - Poor mating of connector halves
       - Backed out terminals
       - Improperly formed or damaged terminals
       - Wire chafing
       - Poor wire-to-terminal connections
       - Dirty or corroded terminals
       - Damaged connector bodies
       - A broken wire inside the insulation
    • Use a J 35616 whenever a diagnostic procedure requests probing or inspecting a terminal. Using the J 35616 ensures that no damage to the terminal will occur. Using the J 35616 provides an estimate of whether the contact tension is sufficient.

Test Description

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

  1. This step performs the Diagnostic Mode 2: Input Test.

  2. This step tests for an open in CKT 650.

  3. This step tests for a faulty right B-pillar PSD open/close switch.

  4. This step tests for an open in CKT 1894.

Step

Action

Value(s)

Yes

No

1

Was the Power Sliding Door (PSD) Diagnostic System Check performed?

--

Go to Step 2

Go to Power Sliding Door (PSD) Diagnostic System Check

2

Enter the Diagnostic Mode 2: Input Test. Refer to Diagnostic Modes in Power Sliding Door (PSD) Diagnostic Information . During the Diagnostic Mode 2, the PSD alarm toggles between ON and OFF while pressing the PSD open/close switch in the right B-pillar.

Does the alarm sound as described?

--

Go to Step 10

Go to Step 3

3

  1. Disconnect the B-pillar PSD open/close switch (right B-pillar) electrical connector.
  2. Using a test lamp, connect between B+ and the PSD open/close switch (right B-pillar) harness connector terminal E.

Does the test lamp light?

--

Go to Step 4

Go to Step 6

4

  1. Connect a J 39200 digital multimeter (DMM), between the PSD open/close switch (right B-pillar) connector terminal A and terminal E (switch side).
  2. Momentarily press the PSD switch (right B-pillar) while measuring the resistance using the J 39200 DMM.

Is the resistance within the specified range?

Pressed: less than 2 ohms

Released: Infinite

Go to Step 5

Go to Step 7

5

  1. Disconnect the rear side door actuator control module electrical connector C2.
  2. Using the J 39200 DMM, measure the resistance between the rear side door actuator control module harness connector C2 terminal 10 and the PSD open/close switch (right B-pillar) harness connector terminal A.

Is the resistance less than the specified value?

10 ohms

Go to Step 8

Go to Step 9

6

Repair the poor connection or the open in CKT 650. Refer to Wiring Repairs in Wiring.

Is the repair complete?

--

Go to Step 11

--

7

Replace the PSD door open/close switch (right B-pillar). Refer to Power Sliding Door (PSD) Open/Close Pillar Switch Replacement .

Is the repair complete?

--

Go to Step 11

--

8

Inspect the PSD open/close switch (right B-pillar) harness connector for poor terminal contact. Repair as necessary.

Is the repair complete?

--

Go to Step 11

--

9

Repair the poor connection or the open in CKT 1894. Refer to Wiring Repairs in Wiring.

Is the repair complete?

--

Go to Step 11

--

10

A malfunction is not present at this time. Refer to Diagnostic Aids for information on intermittent failures.

Is the action complete?

--

Go to Step 11

--

11

  1. Turn the ignition switch to the LOCK position.
  2. Reconnect any connectors/components removed.
  3. Perform the PSD re-initialization. Refer to Power Sliding Door (PSD) Re-Initialization .

Does the PSD operate correctly?

--

System OK

Go to Power Sliding Door (PSD) Diagnostic System Check