GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Locks System Check?

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Go to Step 2

Go to Power Door Locks System Check

2

  1. Disconnect the driver door module (DDM) connector C2.
  2. Use a digital multimeter (DMM) in order to measure the voltage at connector C2, terminals A and D.

Does the voltage measure within the specific range?

10-15 V

Go to Step 3

Go to Step 10

3

  1. Disconnect the remote function actuator (RFA) module connector.
  2. Turn ON the ignition.
  3. Use a DMM in order to measure the voltage at the RFA connector terminal A15 and ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 4

Go to Step 13

4

  1. Turn OFF the ignition.
  2. Use a DMM in order to measure the voltage at the RFA connector terminal A16 and ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 5

Go to Step 14

5

  1. Turn the ignition to ACCY.
  2. Use a DMM in order to measure the voltage at the RFA connector terminal B15 and ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 6

Go to Step 15

6

Has the RFA module been replaced?

--

Go to Step 7

Go to Step 8

7

Has the DDM been replaced?

--

Go to Power Door Locks Switch Lock Function Inoperative - One

Go to Step 9

8

Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Is the repair complete?

--

Go to Power Door Locks System Check

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9

Replace the DDM. Refer to Front Door Module Replacement .

Is the repair complete?

--

Go to Power Door Locks System Check

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10

Use a DMM in order to measure the resistance at DDM connector C2, terminal D and ground.

Does the resistance measure within the specified range?

0-5 ohms

Go to Step 12

Go to Step 11

11

Repair the open in CKT 350 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete.

--

Go to Power Door Locks System Check

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12

Repair the open in CKT 742 (RED). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

--

13

Repair the open in CKT 39 (PNK). Refer to Wiring Repairs .

Is the repair complete?

--

Go to Power Door Locks System Check

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14

Repair the open in CKT 2040 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

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15

Repair the open in CKT 443 (YEL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Power Door Locks System Check

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