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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Door System, Mirror System & Window System) >> Diagnostic Information and Procedures >> Power Sliding Door (PSD) Closes and Re-Opens >> Test Description

Test Description

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  Good electrical contact between the PSD contact plungers and B-Pillar contact pads is essential for reliable PSD operation. This step helps to eliminate the contact plunger to contact pad connections as the cause of the failure.
  2. 4:  The PSD must be disabled at the multifunction switch in order to prevent the power assist feature from taking control of the door during manual operations.
  3. 7:  Turning and holding the interior PSD handle to the open position will close the detent switch circuit in order to facilitate testing.
Power Sliding Door (PSD) Closes and Re-Opens

Step Action Values Yes No
Schematic Reference: Power Sliding Door (PSD) Schematics 
Connector End View Reference: Power Door Systems Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Close the power sliding door (PSD).
  2. Turn the PSD ON/OFF switch ON.
  3. Open the PSD using a PSD OPEN/CLOSE switch.
  4. Close the PSD using a PSD OPEN/CLOSE switch.
Does the PSD close and latch properly?		 - Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3  Inspect the PSD lock switch plate for the following conditions:
  • Proper door plunger operation
  • Proper alignment of the door plungers to the B-pillar contact pads
  • Clean the electrical contacts from the door plungers to the B-pillar contacts pads.

Did you find and correct the condition?		 - Go to Step 25  Go to Step 4 
4 
  1. Turn the PSD ON/OFF switch OFF.
  2. Manually close the PSD.
  3. Install a scan tool.
  4. With the scan tool, observe the PSD Detent Switch parameter in the appropriate data list.
Does the parameter display Inactive?		 - Go to Step 6  Go to Step 5 
5
  1. Open the PSD.
  2. With the scan tool, observe the PSD Detent Switch parameter.
Does the parameter display Inactive?		 - Go to Step 13  Go to Step 17 
6 Observe the PSD Detent Switch parameter while manually operating the PSD as follows:
  • From the latched position to the ajar position
  • From the ajar position to the latched position

Does the parameter briefly change states as the door moves from latched to ajar and from ajar to latched?		 - Go to Step 8  Go to Step 7 
7 
  1. Open the PSD.
  2. Turn and hold the PSD interior door handle in the open position.
  3. Measure the resistance between the detent switch signal circuit and the ground circuit at the appropriate door plate plungers.
Is the resistance measured less than the specified value?		 5 Ω Go to Step 14  Go to Step 16 
8
  1. Manually close the PSD.
  2. Observe the PSD Latch Solenoid Command parameter in the scan tool data display list.
Does the parameter display Inactive?		 - Go to Step 9  Go to Step 19 
9 With the keyless entry transmitter, command the PSD to open while observing the PSD Solenoid Command parameter.
Does the parameter change briefly from Inactive to Active?		 - Go to Step 10  Go to Step 19 
10
  1. Disconnect the C1 harness connector from the power sliding door control module (PSDM).
  2. With a test lamp connected to a good ground, probe the latch/unlatch motor/actuator control circuit of the harness connector.
Did the test lamp illuminate?		 - Go to Step 21  Go to Step 11 
11
IMPORTANT: If the 3-amp jumper wire fuse opens when the jumper wire is connected, test the latch/unlatch motor/actuator control circuit for a short to ground.
  1. Manually close the PSD.
  2. Connect one end of a 3-amp fused jumper wire to battery voltage.
  3. Momentarily connect the other end of the jumper wire to the latch/unlatch motor/actuator control circuit of the harness connector.
Did the PSD unlatch?		 - Go to Step 19  Go to Step 12 
12 Test the latch/unlatch motor/actuator control and ground circuits for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 20 
13 Test the detent switch signal circuit from the detent switch to the corresponding door plate plunger for a short to ground. Refer to Circuit Testing and Wiring Repairs orConnector Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 18 
14 Test the detent switch signal circuit from the B-pillar contact plate pad to the PSDM for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 15 
15 Test the detent switch ground circuit from the B-pillar contact plate pad to the body ground for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 19 
16 Test the detent switch signal and ground circuits from the detent switch to the corresponding door plate plunger for an open or a high resistance. Refer to the following:
Did you find and correct the condition?		 - Go to Step 25  Go to Step 18 
17 Test the detent switch signal circuit from the B Pillar pad to the PSDM for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 19 
18 Inspect for poor connections at the harness connector of the detent switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 22 
19 Inspect for poor connections at the PSDM harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 23 
20 Inspect for poor connections at the harness connector of the PSD latch/unlatch motor/actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 25  Go to Step 24 
21 Repair the latch/unlatch motor/actuator control circuit for a short to voltage. Refer to Wiring Repairs and Connector Repairs .
Is the repair complete?		 - Go to Step 25  -
22 Replace the detent switch. Refer to Lock Replacement - Sliding Door Rear .
Is the repair complete?		 - Go to Step 25  -
23 Replace the PSDM. Refer to Control Module References for replacement, setup and programming.
Is the repair complete?		 - Go to Step 25  -
24 Replace the latch/unlatch motor/actuator. Refer to Unlatch Actuator Replacement - Power Sliding Door .
Is the repair complete?		 - Go to Step 25  -
25 Re-initialize the PSD and operate the system in order to verify the repair.
Did you correct the condition?		 - System OK Go to Step 2 
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