GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Aurora 🢒 Restraints 🢒 SIR 🢒 AIR BAG Warning Lamp Does Not Come On

Object Number: 378083 Size: MF
SIR Schematics
SIR Components
Cell 10: CHIME(IGN 1) Fuse (Buick)
Cell 10: CHIME(IGN 1) Fuse (Oldsmobile)
SIR Caution
Handling ESD Sensitive Parts Notice

Circuit Description

When the ignition switch is first turned to RUN, the IGN 1 fuse (Buick), or the CHIME fuse (Oldsmobile) applies battery voltage to the AIR BAG warning lamp that is connected to the SIR INDICATOR, terminal 7. The AIR BAG fuse applies battery voltage to the ignition positive voltage input, terminal 10. The inflatable restraint sensing and diagnostic module (SDM) responds by flashing the AIR BAG warning lamp 7 times.

When measurements are requested in this table, use J 39200 Digital Multimeter with the correct terminal adapter from J 35616 Connector Test Adapter Kit. When a check for proper connection is requested, refer to Intermittents and Poor Connections . When a wire, connector or terminal repair is requested, use J-38125 Terminal Repair Kit and refer to Wiring Repair .

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This test determines whether the malfunction is in the inflatable restraint Sensing and Diagnostic Module (SDM) circuitry or in the instrument cluster (Buick), remote indicator bank (Oldsmobile) power feed circuitry.

    2.

  2. This test determines whether voltage is present in the warning lamp circuit.

    3.

  3. This test isolates CKT 358 and checks for a short in CKT 358 to B+.

    4.

  4. This test determines if the malfunction is in the instrument cluster (Buick), remote indicator bank (Oldsmobile) connector.

    5.

  5. This test determines if the open is due to a bad bulb.

    6.

  6. This test isolates an open in the warning lamp circuitry.

    7.

  7. This test checks whether power is available to the instrument cluster (Buick), remote indicator bank (Oldsmobile) power feed circuit.

    8.

  8. This test checks for a short from the instrument cluster (Buick), remote indicator bank (Oldsmobile) power feed circuit to ground.

    9.

  9. This test determines whether the short-to-ground is due to a short in the wiring or internal to the instrument cluster (Buick), remote indicator bank (Oldsmobile).

    10.

  10. This test determines if the malfunction is in the instrument cluster (Buick), remote indicator bank (Oldsmobile) connector.

    11.

  11. This test determines whether the malfunction is due to an open power feed circuit from the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Step

Action

Value(s)

Yes

No

1

Did you perform the SIR Diagnostic System Check?

--

Go to Step 2

Go to SIR Diagnostic System Check

2

Note the instrument cluster (Buick), or the remote indicator bank (Oldsmobile) while the ignition switch is turned to the RUN position.

Does the BRAKE indicator illuminate?

--

Go to Step 3

Go to Step 13

3

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the inflatable restraint steering wheel and IP module yellow 2-way connectors at the base of the steering column and above the right sound insulator.
  3. Disconnect the inflatable restraint sensing and diagnostic module (SDM).
  4. Install the J 38715-96 SIR Shorting Bar Tool to the SDM harness connector.
  5. Install the CPA.
  6. Turn the ignition switch to the RUN position.
  7. Using J 39200 DMM, measure the voltage on the SDM harness connector from terminal 7 to ground.

Is the voltage more than the specified value?

10.0 V

Go to Step 4

Go to Step 6

4

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the instrument cluster (Buick), or the remote indicator bank (Oldsmobile). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  3. Turn the ignition switch to the RUN position.
  4. Using J 39200 DMM, measure the voltage on the SDM harness connector from terminal 7 to ground.

Is the voltage less than the specified value?

1.0 V

Go to SIR Diagnostic System Check

Go to Step 5

5
  1. Turn the ignition switch to the OFF position.
  2. Repair a short to B+ condition in CKT 358.
  3. Reconnect the instrument cluster (Buick), or the remote indicator bank (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

6

  1. Turn the ignition switch to the OFF position.
  2. Remove the instrument cluster (Buick), or the remote indicator bank (Oldsmobile). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console.
  3. Inspect for proper connection to the instrument cluster (Buick) terminal E3, remote indicator bank (Oldsmobile) terminal A9.

Is the connector damaged or corroded?

--

Go to Step 7

Go to Step 8

7

Repair the instrument cluster (Buick), or the remote indicator bank (Oldsmobile) harness connector. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

8

  1. Remove the AIR BAG warning lamp bulb.
  2. Inspect the bulb.

Is the bulb good?

--

Go to Step 10

Go to Step 9

9
  1. Replace the AIR BAG warning lamp bulb.
  2. Install the instrument cluster (Buick), or the remote indicator bank (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

10

  1. Install the AIR BAG warning lamp bulb.
  2. Using J 39200 DMM, measure the resistance from the instrument cluster (Buick) harness connector terminal E3, or remote indicator bank (Oldsmobile) harness connector terminal A9 to the SDM harness connector terminal 7.

Is the resistance within the specified values?

0-5 ohms

Go to Step 12

Go to Step 11

11
  1. Repair an open condition in CKT 358.
  2. Install the instrument cluster (Buick), or the remote indicator bank (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

12

Service the instrument cluster (Buick), or the remote indicator bank (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

13

  1. Disconnect the inflatable restraint steering wheel and IP module yellow 2-way connectors at the base of the steering wheel and above the right sound insulator.
  2. Turn the ignition switch to the OFF position.
  3. Remove the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).
  4. Inspect the fuse.

Is the fuse good?

--

Go to Step 19

Go to Step 14

14

  1. Replace the fuse.
  2. Turn the ignition switch to the RUN position for 10 seconds.
  3. Turn the ignition switch to the OFF position.
  4. Remove the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).
  5. Inspect the fuse.

Is the fuse good?

--

Go to Step 18

Go to Step 15

15

  1. Disconnect the inflatable restraint steering wheel and IP module yellow 2-way connectors at the base of the steering wheel and above the right sound insulator.
  2. Disconnect the instrument cluster (Buick), or the remote indicator bank (Oldsmobile). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  3. Replace the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).
  4. Turn the ignition switch to the RUN position for 10 seconds.
  5. Turn the ignition switch to the OFF position.
  6. Remove the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).
  7. Inspect the fuse.

Is the fuse good?

--

Go to Step 17

Go to Step 16

16
  1. Repair a short-to-ground condition in CKT 39.
  2. Replace the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

17
  1. Service the instrument cluster (Buick), or the remote indicator bank (Oldsmobile).
  2. Install the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

18

Install the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

19

  1. Remove the instrument cluster (Buick), or the remote indicator bank (Oldsmobile). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
  2. Inspect for proper connection to the instrument cluster (Buick) at terminals E15 and F15, or the remote indicator bank (Oldsmobile) at terminal A1.

Is the connector damaged or corroded?

--

Go to Step 20

Go to Step 21

20

Repair the instrument cluster (Buick), or the remote indicator bank (Oldsmobile) harness connector. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 24

--

21

Using J 39200 DMM, measure the resistance between the instrument cluster (Buick) harness connector terminal E15, or the remote indicator bank (Oldsmobile) harness connector terminal A1 to each terminal of the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile) fuseholder.

Is either reading within the specified values?

0-5 ohms

Go to Step 23

Go to Step 22

22
  1. Repair an open condition in CKT 39.
  2. Install the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

23
  1. Repair an open condition in the power feed to the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).
  2. Install the IGN 1 Fuse (Buick), CHIME Fuse (Oldsmobile).

Did you complete the repair?

--

Go to Step 24

--

24
  1. Reconnect all the SIR system components.
  2. Ensure that all of the components are properly mounted.

Have all the SIR components been reconnected and properly mounted?

--

Go to SIR Diagnostic System Check

--