GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Firebird 🢒 Restraints 🢒 Seat Belts 🢒 DTC 24/34

Circuit Description

The body control module (BCM) controls the operation of the fasten safety belt indicator. The fasten safety belt indicator is located in the instrument cluster. The BCM turns ON the fasten safety belt indicator by sending voltage through the seat belt indicator supply voltage circuit. The fasten safety belt indicator receives ground through the ground circuit.

The BCM turns ON the fasten safety belt indicator for 55 seconds when the following conditions are met:

    • The ignition is ON
    • The driver unbuckles the seat belt

If the driver seat belt is fastened during the 55 second period, the BCM turns OFF the fasten safety belt indicator. If the driver's seat belt releases anytime during the same ignition cycle, the BCM turns ON the seat belt indicator again for 55 seconds.

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The BCM detects a short to voltage or a short to ground in the fasten safety belt indicator supply voltage circuit.

Action Taken When the DTC Sets
    • The fasten safety belt indicator does not turn on when the fasten safety belt indicator supply voltage circuit shorts to ground.
    • The fasten safety belt indicator stays on at all times when the fasten safety belt indicator supply voltage circuit shorts to voltage.

Conditions for Clearing the DTC

A short to voltage or a short to ground in the fasten safety belt indicator supply voltage circuit is no longer present.

Diagnostic Aids
    • Inspect for a short to voltage or a short to ground in the fasten safety belt indicator supply voltage circuit.
    • Inspect for an internal short to voltage or a short to ground within the instrument cluster.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step tests to see if there is a short to voltage in the fasten safety belt indicator supply voltage circuit.

    2.

  2. This step tests to see if there is a short to ground in the fasten safety belt indicator supply voltage circuit.

Step

Action

Yes

No

Schematic Reference: Seat Belt Schematics

1

Did you perform the Diagnostic System Check - Seat Belts?

Go to Step 2

Go to Diagnostic System Check - Seat Belts

2
  1. Turn ON the ignition, with the engine OFF.
  2. Note the fasten safety belt indicator while turning ON the ignition.

Does the fasten safety belt indicator stay ON continuously?

Go to Step 3

Go to Step 7

3
  1. Turn OFF the ignition.
  2. Disconnect the BCM connector C3.
  3. Turn ON the ignition, with the engine OFF.

Does the fasten safety belt indicator stay ON continuously?

Go to Step 5

Go to Step 4

4

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 8

--

5

  1. Disconnect the instrument cluster connector.
  2. Test the fasten safety belt indicator supply voltage circuit for a short to voltage.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console.

Did you complete the replacement?

Go to Step 8

--

7

  1. Disconnect the body control module (BCM) connector C3.
  2. Disconnect the instrument panel connector.
  3. Test the fasten safety belt indicator supply voltage circuit for a short to ground.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

8
  1. Reconnect all components.
  2. Use the scan tool in order to clear the DTCs.
  3. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK