GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics and Release Systems Schematics

Connector End View Reference: Vehicle Access Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the passenger door handle parameter in the passenger door module (PDM) data list.
  4. Activate the front passenger exterior door handle.

Does the scan tool display Inactive?

Go to Step 7

Go to Step 3

3

  1. With a scan tool, observe the ext. psgr. door handle switch parameter in the remote control door lock receiver (RCDLR) miscellaneous inputs list.
  2. Activate the front passenger exterior door handle.

Does the scan tool display Inactive?

Go to Step 8

Go to Step 4

4

  1. Turn OFF the ignition.
  2. Disconnect the PDM C 1 harness connector.
  3. Connect a test lamp between the door handle switch signal circuit of the unlatch enable switch and battery voltage at the PDM C 1 harness connector.

Does the test lamp illuminate?

Go to Step 11

Go to Step 5

5

Activate the front passenger exterior door handle and observe the test lamp.

Does the test lamp illuminate as the front passenger exterior door handle is activated?

Go to Step 6

Go to Step 12

6

  1. Reconnect the PDM C 1 harness connector.
  2. Disconnect the front passenger door latch assembly harness connector.
  3. Connect a test lamp between the door latch motor control circuit and the door unlatch motor control circuit at the passenger door latch assembly harness connector.
  4. Turn ON the ignition, with the engine OFF.
  5. Activate the front passenger exterior door handle.

Does the test lamp illuminate as the door handle is activated?

Go to Step 14

Go to Step 9

7

Test the right front door handle lift switch signal circuit of the PDM for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 13

8

Test the right front door handle lift switch signal circuit of the RCDLR for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 15

9

Test the door latch motor control circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 10

10

Test the door unlatch motor control circuit for an open, high resistance, or short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 16

11

Test the door handle switch signal circuit of the unlatch enable switch for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 17

12

Test the door handle switch signal circuit of the unlatch enable switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 13

13

Test the front passenger door handle switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 17

14

Inspect for poor connections at the harness connector of the front passenger door latch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 18

15

Inspect for poor connections at the harness connector of the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 19

16

Inspect for poor connections at the harness connector of the PDM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 20

17

Inspect for poor connections at the harness connector of the front passenger exterior door handle switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 22

Go to Step 21

18

Replace the front passenger door lock assembly. Refer to Front Side Door Lock Replacement .

Did you complete the replacement?

Go to Step 22

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19

Replace the RCDLR. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 22

--

20

Replace the PDM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 22

--

21

Replace the front passenger exterior door handle switch. Refer to Front Side Door Outside Handle Replacement .

Did you complete the replacement?

Go to Step 22

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22

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2