GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1985 🢒 Demonstrator 🢒 Body 🢒 Doors 🢒 Power Door Locks Inoperative

Power Door Locks Inoperative w/ Keyless Entry

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to

2

Verify that the power door locks are inoperative.

Do the power door locks operate normally?

Go to in Wiring System

Go to Step 3

3

Are all of the power door locks inoperative from both door lock switches?

Go to Step 6

Go to Step 4

4

Are the power door locks inoperative from a single door lock switch?

Go to Step 7

Go to Step 5

5

Is the driver door lock actuator the inoperative actuator?

Go to Step 8

Go to Step 9

6
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the door lock ON and OFF.

Do the door lock actuators activate?

Go to Step 10

Go to Step 11

7

Test the ground circuit on the appropriate door lock switch for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 12

8

Test the unlock control circuit on the driver door lock actuator for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 13

9

Test the unlock control circuit on the appropriate door lock actuator for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 13

10

Test the lock/unlock signal circuit for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 18

11

Is the ICBM (PWR) fuse open?

Go to Step 14

Go to Step 15

12

Test the lock/unlock signal circuit for an open. Refer to and to in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 19

13

Test the lock control circuit on the appropriate door lock actuator for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 20

14
  1. Replace the ICBM (PWR) fuse.
  2. Disconnect all of the door lock actuators.
  3. Activate a door lock switch to the LOCK and UNLOCK positions.

Does the power door locks fuse open?

Go to Step 16

Go to Step 17

15

Test the BCM ground circuit for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 18

16

Test the following circuits for a short to ground:

    • The unlock control circuit on the door lock actuator
    • The unlock control circuit on the driver door lock actuator
    • The lock control on the door lock actuator

Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 18

17
  1. Connect the door lock actuators, one at a time.
  2. Activate a door lock switch to the LOCK and UNLOCK positions after each door lock actuator is connected.

Does the power door locks fuse open after any of the door lock actuators is connected?

Go to Step 20

Go to Step 18

18

Inspect for poor connections at the body control module. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 21

19

Inspect for poor connections at the appropriate door lock switch. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 22

20

Inspect for poor connections at the appropriate door lock actuator. Refer toand in Wiring Systems.

Did you find and correct the condition?

Go to Step 24

Go to Step 23

21
  1. Perform the set-up procedure for the body control module. Refer to in Body Control System.
  2. Replace the body control Module. Refer to in Computer/Integrating System.

Did you complete the replacement?

Go to Step 24

--

22

Replace the appropriate door lock switch. Refer to Door Lock Switch Replacement - Driver Door or to .

Did you complete the repair?

Go to Step 24

--

23

Replace the appropriate door lock. Refer to Front Side Door Lock Replacement or to .

Did you complete the repair?

Go to Step 24

--

24

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2

Power Door Locks Inoperative w/o Keyless Entry

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Power Door Systems Connector End Views

1

Did you perform the Vehicle Diagnostic System Check?

Go to Step 2

Go to

2

Verify that the power door locks are inoperative.

Do the power door locks operate normally?

Go to in Wiring System

Go to Step 3

3

Are all of the power door locks inoperative from both door lock switches?

Go to Step 5

Go to Step 4

4

Are the power door locks inoperative from a single door lock switch?

Go to Step 6

Go to Step 7

5
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the door lock ON and OFF.

Do the door lock actuators activate?

Go to Step 8

Go to Step 9

6

Test the ground circuit on the appropriate door lock switch for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 10

7

Test the unlock control circuit on the appropriate door lock actuator for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 11

8

Test the lock/unlock signal circuit for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

9

Is the ICBM (PWR) fuse open?

Go to Step 12

Go to Step 13

10

Test the lock/unlock signal circuit for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 17

11

Test the lock control circuit on the appropriate door lock actuator for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 18

12
  1. Replace the ICBM (PWR) fuse.
  2. Disconnect all of the door lock actuators.
  3. Activate a door lock switch to the LOCK and UNLOCK positions.

Does the power door locks fuse open?

Go to Step 14

Go to Step 15

13

Test the BCM ground circuit for an open. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

14

Test the following circuits for a short to ground:

    • The unlock control circuit to the door lock actuator
    • The lock control circuit to the door lock actuator

Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 16

15
  1. Connect the door lock actuators, one at a time.
  2. Activate a door lock switch to the LOCK and UNLOCK positions after each door lock actuator is connected.

Does the power door locks fuse open after any of the door lock actuators is connected?

Go to Step 18

Go to Step 16

16

Inspect for poor connections at the body control module. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 19

17

Inspect for poor connections at the appropriate door lock switch. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 20

18

Inspect for poor connections at the appropriate door lock actuator. Refer to and in Wiring Systems.

Did you find and correct the condition?

Go to Step 22

Go to Step 21

19
  1. Perform the set-up procedure for the body control module. Refer to in Body Control System.
  2. Replace the body control Module. Refer to in Body Control System.

Did you complete the replacement?

Go to Step 22

--

20

Replace the appropriate door lock switch. Refer to Door Lock Switch Replacement - Driver Door or to .

Did you complete the repair?

Go to Step 22

--

21

Replace the appropriate door lock. Refer to Front Side Door Lock Replacement or to .

Did you complete the repair?

Go to Step 22

--

22

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2