GM Service Manual Online
For 1990-2009 cars only

Fasten Safety Belt Indicator/Chime Inoperative Driver

Step

Action

Yes

No

Schematic Reference: Seat Belt Schematics

Connector End View Reference: Seat Belt Connector End Views

1

Did you review the Seat Belt System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Seat Belts

2

  1. Close the driver door.
  2. Do not connect the driver seat belt.
  3. Turn the ignition switch to the ON position.
  4. The seat belt warning alarm should chime approximately one chime per second for approximately 5 seconds.
  5. The seat belt indicator flashes.
  6. The seat belt indicator goes out and the alarm stops chiming when the seat belt is fastened.

Does the seat belt warning system operate properly?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Disconnect the seat belt switch connector.
  2. Test the operation of the seat belt switch. The switch should be open between terminals 5 and 6 when the seat belt is buckled and closed when the seat belt is not buckled.

Does the seat belt switch operate properly?

Go to Step 4

Go to Step 7

4

Test the seat belt switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Test the seat belt switch ground circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 6

6

Inspect for a poor connection of the harness connector at the instrument panel cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Replace the seat belt switch. Refer to Seat Belt Buckle Replacement - Left Front .

Did you complete the replacement?

Go to Step 9

--

8

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 9

--

9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3

Fasten Safety Belt Indicator/Chime Inoperative Passenger

Step

Action

Yes

No

Schematic Reference: Seat Belt Schematics

Connector End View Reference: Seat Belt Connector End Views

1

Did you review the Seat Belt System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Seat Belts

2

Are there any SIR DTCs set?

Go to Diagnostic Starting Point - SIR in Restraints-SIR

Go to Step 3

3

  1. Close the passenger door.
  2. Do not connect the passenger seat belt.
  3. Turn the ignition switch to the ON position.
  4. The passenger seat belt indicator flashes.
  5. The air bag indicator displays ON.
  6. The seat belt indicator goes out when the seat belt is fastened.

Does the seat belt warning system operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

4

Test the passenger seat belt indicator feed circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 5

5

Test the passenger seat belt indicator ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 6

6

  1. Do not sit in the passenger seat.
  2. Unbuckle the passenger seat belt.
  3. Turn the ignition switch to the ON position.
  4. Test for ignition voltage at the passenger seat belt indicator control circuit at the passenger seat belt indicator harness connector. Refer to Circuit Testing in Wiring Systems.

Is ignition voltage present?

Go to Step 7

Go to Step 10

7

Test for ignition voltage at the passenger seat belt indicator control circuit at the instrument panel cluster (IPC) harness connector. Refer to Circuit Testing in Wiring Systems.

Is ignition voltage present?

Go to Step 8

Go to Step 13

8

Test for ignition voltage at the passenger presence signal circuit at the IPC harness connector. Refer to Circuit Testing in Wiring Systems.

Is ignition voltage present?

Go to Step 9

Go to Step 11

9

Test for ignition voltage at the passenger presence signal circuit at the inflatable restraint sensing and diagnostic module (SDM) harness connector. Refer to Circuit Testing in Wiring Systems.

Is ignition voltage present?

Go to Step 12

Go to Step 14

10

Inspect for a poor connection of the harness connector at the passenger seat belt indicator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 15

11

Inspect for a poor connection of the harness connector at the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

12

Inspect for a poor connection of the harness connector at the inflatable restraint SDM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 17

13

Repair the short to B+ in the passenger seat belt indicator control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

--

14

Repair the short to B+ in the passenger presence signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

--

15

Replace the passenger seat belt warning lamp. Refer to Instrument Panel Center Trim Panel Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

Go to Step 18

--

16

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

Go to Step 18

--

17

Replace the inflatable restraint SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in SIR.

Did you complete the replacement?

Go to Step 18

--

18

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3