GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Catera 🢒 DTC 🢒 DTC 15 Driver Air Bag Deploy. Loop Short to V

Object Number: 601070 Size: SF
SIR Components
Power, Ground, Serial Data, Indicator and Front Inflatable Restraint Modules
SIR Caution
Handling ESD Sensitive Parts Notice

Circuit Description

When you first turn ON the ignition, the inflatable restraint sensing and diagnostic and seat belt pretensioner module (SDM) performs tests to diagnose critical malfunctions within itself. Then, the SDM proceeds with the RESISTANCE MEASUREMENT test to measure the deployment loop resistances to ensure they are within their respective normal resistance ranges. Upon passing these tests, the energy reserve is charged and the firing transistors are tested. The SDM then goes into CONTINUOUS MONITORING mode.

Conditions for Running the DTC

When the ignition voltage is within the normal operating voltage range, the SDM monitors all deployment loops in order to detect a leakage current to voltage in the driver frontal air bag deployment loop.

Conditions for Setting the DTC

The measured leakage current to voltage is above the specified value in the driver frontal air bag deployment loop.

Action Taken When the DTC Sets

The SDM turns ON the AIR BAG warning lamp.

Conditions for Clearing the DTC
    • You can issue a CLEAR CODES command.
    • A history DTC will clear once 255 malfunction free ignition cycles have occurred.

Diagnostic Aids

A short to voltage in the driver frontal air bag deployment loop can cause an intermittent condition. Inspect the driver frontal high and driver frontal low circuits carefully for cutting or chafing.

Test Description

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

  1. This step checks the inflatable restraint steering wheel module coil integral connector.

    2.

  2. This step checks to see if the inflatable restraint steering wheel module is defective.

    3.

  3. This step checks to see if the inflatable restraint steering wheel module coil is defective.

    4.

  4. This step checks to see if there is a short to voltage in the driver frontal high circuit.

    5.

  5. This step determines if there is a short to voltage in the driver frontal low circuit or if there is a malfunctioning SDM.

    6.

  6. This step clears all DTCs.

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check - SIR?

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Go to Step 2

Go to Diagnostic System Check - SIR

2

  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  4. Inspect the inflatable restraint steering wheel module coil integral connector for the following conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems:
    5. • Corrosion
    • Damaged terminals
    • Poor connections/terminal tension

Does the inflatable restraint steering wheel module coil integral connector exhibit signs of corrosion, terminal damage, or poor connections?

--

Go to Step 3

Go to Step 4

3

Replace the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement .

Did you complete the replacement?

--

Go to Step 13

--

4

  1. Use the J 38715-30A adaptor to connect the J 38715-A SIR Driver/Passenger Load Tool STEERING COLUMN connector to the inflatable restraint steering wheel module coil integral connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool to request the SIR DTC display.

Does the scan tool indicate that this DTC is current?

--

Go to Step 6

Go to Step 5

5
  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Replace the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .

Did you complete the replacement?

--

Go to Step 13

--

6

  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Remove the J 38715-A .
  4. Disconnect the inflatable restraint steering wheel module coil wiring harness connector. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement .
  5. Use the J 38715-40 adaptor to connect the J 38715-A SIR Driver/Passenger Load Tool BASE OF COLUMN connector to the inflatable restraint steering wheel module coil wiring harness connector.
  6. Turn ON the ignition, with the engine OFF.
  7. Use the scan tool to request the SIR DTC display.

Does the scan tool indicate that this DTC is current?

--

Go to Step 8

Go to Step 7

7
  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Replace the inflatable restraint steering wheel module coil. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement .

Did you complete the replacement?

--

Go to Step 13

--

8

  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Remove the J 38715-A .
  4. Disconnect the inflatable restraint sensing and diagnostic and seat belt pretensioner module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module Replacement .
  5. Insert the J 42113 SIR Shorting Bar Tool into the SDM wiring harness connector above the driver frontal high and driver frontal low circuits.
  6. Turn ON the ignition, with the engine OFF.
  7. Use the J 39200 Digital Multimeter (DMM) to measure the voltage between the driver frontal high circuit and a known good ground.

Does the voltage measure less than the specified value?

1 V

Go to Step 10

Go to Step 9

9

Locate and repair the short to voltage in the driver frontal high circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 13

--

10

Use the DMM to measure the voltage between the driver frontal low circuit and a known good ground.

Does the voltage measure less than the specified value?

1 V

Go to Step 12

Go to Step 11

11

Locate and repair the short to voltage in the driver frontal low circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 13

--

12

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

Did you complete the replacement?

--

Go to Step 13

--

13

  1. Reconnect all SIR components.
  2. Verify that all connectors and components are properly mounted.
  3. Turn ON the ignition, with the engine OFF.
  4. Use the scan tool in order to clear the DTCs.

Did you complete the action?

--

Go to Diagnostic System Check - SIR

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