GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Warning Indicator Always On

Step

Action

Value(s)

Yes

No

1

Was the Audible Warning System Check performed?

--

Go to Step 2

Go to Audible Warnings System Check in Instrument Panel, Gauges and Console

2

Was the BCM Diagnostic System Check performed?

--

Go to Step 3

Go to Diagnostic System Check - Body Control System in Body Control System

3

Test for powertrain control module (PCM) diagnostic trouble codes (DTCs). Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 2.5L (LB8) and 3.0L (L46).

Is the action complete?

--

Go to Step 4

--

4
  1. Connect a scan tool to the data link connector (DLC).
  2. Use the scan tool in order to monitor the park brake switch input.
  3. While observing the scan tool, apply and then release the parking brake.

Does the scan tool indicate that the park brake input is active with the parking brake applied?

--

Go to Step 8

Go to Step 5

5
  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the scan tool from the DLC.
  3. Disconnect the BCM connector C1.
  4. Release the parking brake.
  5. Use a DMM in order to measure the voltage between the BCM connector C1 terminal D5 and B+.

Is the voltage within the specified range?

9-14 V

Go to Step 6

Go to Step 8

6
  1. Leave the DMM connected from previous step.
  2. Disconnect the park brake indicator switch electrical connector.
  3. Measure the voltage again.

Is the voltage within the specified range?

9-14 V

Go to Step 7

Go to Step 9

7
  1. Leave the DMM connected from the previous step.
  2. Disconnect the automatic headlamp control module electrical connector C2.
  3. Measure the voltage again.

Is the voltage within the specified range?

9-14 V

Go to Step 11

Go to Step 10

8
  1. Disconnect the scan tool from the DLC.
  2. Turn the ignition switch to the LOCK position.
  3. Close all of the vehicle doors.
  4. Apply the parking brake.
  5. Step firmly and hold the brake pedal.
  6. Start the engine.
  7. While shifting the transaxle into DRIVE, listen to the chime.
  8. While the transaxle is in DRIVE, release the parking brake. The chime stops.
  9. Shift the transaxle into park.
  10. Turn the engine OFF.

Did the BCM stop the chime for the parking brake reminder upon releasing the parking brake while the transaxle into DRIVE?

--

Go to Step 12

Go to Step 13

9

Replace the park brake indicator switch.

Is the repair complete?

--

Go to Step 14

--

10

Test for a short to ground in circuit 1830.

Is the repair complete?

--

Go to Step 15

Go to Step 16

11

Repair a poor connection or an open in circuit 233.

Is the repair complete?

--

Go to Step 14

--

12

The malfunction is not present at this time. Refer to Audible Warnings Circuit Description for more information regarding the operation of the parking brake reminder.

Is the repair complete?

--

Go to Step 14

--

13
  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  2. Perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

--

Go to Step 14

--

14
  1. Turn the ignition switch to the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Audible Warnings System Check in Instrument Panel, Gauges and Console

--

15

Repair a short to ground in circuit 1830.

Is the repair complete?

--

Go to Step 14

--

16

Replace the automatic headlamp control module. Refer to Headlamp Control Module Replacement in Lighting Systems.

Is the repair complete?

--

Go to Step 14

--