GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Regal 🢒 Body and Accessories 🢒 Keyless Entry 🢒 Keyless Entry System Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the BCM diagnostic system check?

--

Go to Step 2

Go to Diagnostic System Check - Body Control System

2

Did you perform the Remote Keyless Entry Diagnostic System Check?

--

Go to Step 3

Go to the Remote Keyless Entry System Check

3
  1. Remove the key from the ignition key lock cylinder.
  2. Close all of the vehicle doors.
  3. Observe the door locks and press the following buttons on the driver door switch:
    4. • The LOCK button
    • The UNLOCK button
  4. Observe the door locks and press the following buttons on the passenger door switch:
    5. • The LOCK button
    • The UNLOCK button

Do all of the doors lock and unlock with either door lock switch?

--

Go to Step 4

Go to Power Door Locks System Check

4

Complete the following steps in order to resynchronize the transmitter:

  1. Press and hold the LOCK button for at least 7 seconds , one transmitter at a time.
  2. Verify that the key is removed from the ignition cylinder lock.
  3. Close all of the vehicle doors.
  4. Observe the door locks and press the LOCK button 1 time.
  5. Observe the door locks and press the UNLOCK button 2 times.
  6. Observe the rear compartment lid and press the REAR COMPARTMENT button 1 time.
  7. Observe the headlamps and the horn and press the ALARM button.

Does the keyless entry system operate the door lock, the rear compartment lid, and the alarm?

--

Go to Step 20

Go to Step 5

5
  1. Remove the transmitter batteries.
  2. Use a DMM in order to measure the voltage on each of the transmitter batteries.

Is the voltage within the specified range?

3-3.5 V

Go to Step 6

Go to Step 13

6
  1. Reprogram all of the transmitters. Refer to Transmitter Programming
  2. Verify that the key is removed from the ignition cylinder lock.
  3. Close all of the vehicle doors.
  4. Observe the door locks and press the LOCK button 1 time.
  5. Observe the door locks and press the UNLOCK button 2 times.
  6. Observe the rear compartment lid and press the REAR COMPARTMENT button 1 time, while observing the rear compartment lid.
  7. Observe the headlamps and the horn and press the ALARM button.

Does the keyless entry system operate the door lock, the rear compartment lid, and the alarm?

--

Go to Step 19

Go to Step 7

7
  1. Program an operational transmitter. Refer to Transmitter Programming
  2. Ensure that the key has been removed from the ignition cylinder lock.
  3. Close all of the vehicle doors.
  4. Observe the door locks and press the LOCK button 1 time.
  5. Observe the door locks and press the UNLOCK button 2 times.
  6. Observe the rear compartment lid and press the REAR COMPARTMENT button 1 time.
  7. Observe the headlamps and the horn and press the ALARM button.

Does the keyless entry system operate the door lock, the rear compartment lid, and the alarm?

--

Go to Step 14

Go to Step 8

8

Does the radio work?

--

Go to Step 9

Go to Step 10

9
  1. Disconnect the remote control lock receiver (RCDLR).
  2. Use a test light in order to connect between the RCDLR harness connector terminals A and C.

Does the test lamp light?

--

Go to Step 16

Go to Step 12

10

Inspect the RADIO-HVAC fuse.

Is the RADIO-HVAC fuse open?

--

Go to Step 11

Go to Step 15

11

Repair the short to ground in CKT 640.

Is the repair complete?

--

Go to Step 6

--

12

Use a test light in order to connect between the RCDLR harness connector terminal C and ground.

Does the test lamp light?

--

Go to Step 17

Go to Step 18

13

Replace the transmitter batteries.

Is the repair complete?

--

Go to Step 4

--

14

Replace the malfunctioning transmitter.

Is the repair complete?

--

Go to Step 6

--

15

Repair a poor connection or open in circuit 640 between the fuse block and S202.

Is the repair complete?

--

Go to Step 6

--

16
  1. Inspect for a poor connector terminal contact at the RCDLR.
  2. If OK, replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement .

Is the repair complete?

--

Go to Step 6

--

17

Repair the poor connection or the open in CKT 1550.

Is the repair complete?

--

Go to Step 6

--

18

Repair the poor connection or the open in CKT 640.

Is the repair complete?

--

Go to Step 6

--

19
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect all of the connectors.
  3. Install all of the components that you removed.

Are the repairs complete?

--

Go to the Remote Keyless Entry System Check

--

20

Ensure that the keyless entry system is operational. Refer to Keyless Entry System Circuit Description .

Is the action complete?

--

Go to Step 19

--