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For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Prix 🢒 Restraints 🢒 SIR 🢒 AIR BAG Warning Lamp Does Not Come On

Object Number: 590455 Size: SF
SIR Component Views
Power/Grounds, Inflator Modules
SIR Handling Caution

Circuit Description

The ignition switch supplies Ignition 1 voltage to the inflatable restraint sensing and diagnostic module (SDM) at Ignition Positive Voltage power circuit using the SIR Fuse. The ignition switch also supplies Ignition 1 voltage to the AIR BAG warning lamp using the IP-IGN Fuse. The AIR BAG warning lamp is connected to the Iflatable Restraint Indicator feed circuit of the SDM. When the ignition switch is first turned to the RUN position, the SDM responds by flashing the AIR BAG warning lamp seven times.

When measurements are requested in this table, use the J 39200 DMM with the correct terminal adapter from the J 35616 Connector Test Adapter Kit. When an inspection for proper connection is requested, refer to Testing for Electrical Intermittents in Wiring Systems. When a wire, connector or terminal repair is requested, use the J-38125 Terminal Repair Kit and refer to Wiring Repairs in Wiring Systems.

Test Description

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

  1. This step checks to see if the malfunction is in the inflatable restraint sensing and diagnostic module (SDM) circuitry or in the instrument cluster power feed circuitry.

    2.

  2. This step checks to see if voltage is present in the AIR BAG warning lamp circuit.

    3.

  3. This step checks to see if there is a short to B+ in the Inflatable Restraint Indicator feed circuit.

    4.

  4. This step checks to see if the instrument cluster wiring harness connector C2 is damaged or corroded.

    5.

  5. This step checks to see if the open is due to a bad bulb.

    6.

  6. This step checks to see if there is an open or a high resistance in the Inflatable Restraint Indicator feed circuit.

    7.

  7. This step checks to see if power is available to the instrument cluster power feed circuit.

    8.

  8. This step determines if there is a short to ground in the Inflatable Restraint Warning Indicator feed circuit or if there is a malfunctioning instrument cluster.

    9.

  9. This step checks to see if the instrument cluster wiring harness connector C2 is damaged or corroded.

    10.

  10. This step determines if there is an open or a high resistance in the Inflatable Restraint Warning Indicator feed circuit or if there is an open or a high resistance in the power feed circuit to the IP-IGN Fuse.

AIR BAG Warning Lamp Does Not Come On

Step

Action

Value(s)

Yes

No

1

Was the SIR Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - SIR

2

  1. Set the parking brake.
  2. Turn the ignition switch to the RUN position.

Does the BRAKE indicator turn ON?

--

Go to Step 3

Go to Step 13

3

  1. Turn OFF the ignition.
  2. Disconnect the inline connectors C215 and C216.
  3. Disconnect the inflatable restraint sensing and diagnostic module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
  4. Install the J 42113 SIR Shorting Bar Tool to the SDM wiring harness connector so that the shorting bar between the Inflatable Restraint Indicator feed circuit and the ground circuit is properly lifted.
  5. Turn ON the ignition, with the engine OFF.
  6. Use the J 39200 Digital Multimeter (DMM) to measure the voltage between the Inflatable Restraint Indicator feed circuit of the SDM wiring harness connector and a known good ground.

Is the measured voltage more than the specified value?

10.0 V

Go to Step 4

Go to Step 6

4

  1. Turn OFF the ignition.
  2. Disconnect the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  3. Turn ON the ignition, with the engine OFF.
  4. Use the J 39200 to measure the voltage between the Inflatable Restraint Indicator feed circuit of the SDM wiring harness connector and a known good ground.

Is the measured voltage less than the specified value?

1.0 V

Go to Step 24

Go to Step 5

5
  1. Turn OFF the ignition .
  2. Locate a short to B+ in the Inflatable Restraint Indicator feed circuit.
  3. Repair the short to B+ in the Inflatable Restraint Indicator feed circuit.
  4. Reconnect the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 25

--

6

  1. Turn OFF the ignition.
  2. Remove the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  3. Check the instrument cluster connector C2 for a proper connection at the Inflatable Restraint Indicator feed circuit.

Is the connector damaged or corroded?

--

Go to Step 7

Go to Step 8

7

Repair the instrument cluster connector C2. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 25

--

8

  1. Remove the AIR BAG warning lamp. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.
  2. Inspect the AIR BAG warning lamp.

Is the AIR BAG warning lamp good?

--

Go to Step 10

Go to Step 9

9
  1. Replace the AIR BAG warning lamp. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.
  2. Install the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 25

--

10

  1. Install the AIR BAG warning lamp. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.
  2. Use the J 39200 to measure the resistance of the Inflatable Restraint Indicator feed circuit between the instrument cluster connector C2 and the SDM wiring harness connector.

Is the measured resistance within the specified value?

0-2 ohms

Go to Step 12

Go to Step 11

11
  1. Locate an open or a high resistance in the Inflatable Restraint Indicator feed circuit.
  2. Repair the open or the high resistance in the Inflatable Restraint Indicator feed circuit.
  3. Install the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 25

--

12

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

Is the repair complete?

--

Go to Step 25

--

13

  1. Turn OFF the ignition.
  2. Remove the IP-IGN Fuse.
  3. Inspect the fuse.

Is the fuse good?

--

Go to Step 19

Go to Step 14

14
  1. Replace the fuse.
  2. Turn ON the ignition, with the engine OFF for 10 seconds.
  3. Turn OFF the ignition.
  4. Remove the IP-IGN Fuse.
  5. Inspect the fuse.

Is the fuse good?

--

Go to Step 18

Go to Step 15

15

  1. Disconnect the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  2. Use the J 39200 to measure the resistance between the Inflatable Restraint Warning Indicator feed circuit of the instrument cluster connector C2 and a known good ground.

Is the measured resistance less than the specified value?

OL

Go to Step 16

Go to Step 17

16
  1. Locate a short to ground in the Inflatable Restraint Warnining Indicator feed circuit.
  2. Repair the short to ground in the Inflatable Restraint Warning Indicator feed circuit.
  3. Replace the IP-IGN Fuse.

Is the repair complete?

--

Go to Step 25

--

17
  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  2. Install the IP-IGN Fuse.

Is the repair complete?

--

Go to Step 25

--

18

Install the IP-IGN Fuse.

Is the repair complete?

--

Go to Step 25

--

19

  1. Disconnect the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  2. Check the instrument cluster connector C2 for a proper connection at the Inflatable Restraint Warning Indicator feed circuit.

Is the connector damaged or corroded?

--

Go to Step 20

Go to Step 21

20

Replace the instrument cluster connector C2. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 25

--

21

Use the J 39200 to measure the resistance between the Inflatable Restraint Warning Indicator feed circuit of the instrument cluster connector C2 and each terminal of the IP-IGN Fuse fuseholder.

Is either reading within the specified value?

0-2 ohms

Go to Step 23

Go to Step 22

22
  1. Locate an open or a high resistance in the Inflatable Restraint Warning Indicator feed circuit.
  2. Repair the open or the high resistance in the Inflatable Restraint Warning Indicator feed circuit.
  3. Install the IP-IGN Fuse.

Is the repair complete?

--

Go to Step 25

--

23
  1. Repair an open or a high resistance in the power feed circuit to the IP-IGN Fuse. Refer to Power Distribution Schematics in Wiring Systems.
  2. Install the IP-IGN Fuse.

Is the repair complete?

--

Go to Step 25

--

24

Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .

Is the repair complete?

--

Go to Step 25

--

25
  1. Reconnect all SIR components.
  2. Make sure that all components and connectors are properly mounted.

Have all the SIR components been reconnected and properly mounted?

--

Go to Diagnostic System Check - SIR

--