GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 DTC 🢒 DTC 0037 or 0038

Circuit Description

The inflatable restraint instrument panel (I/P) module deployment loop consists of an inflatable restraint I/P module, the I/P module high and I/P module low circuits. A shorting bar is used in the inflatable restraint I/P module connector, which will short together the I/P high and I/P module low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force, the sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the inflatable restraint I/P module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored.

DTC Descriptor

This diagnostic procedure supports the following DTCs:

DTC 0037 Passenger Deployment Loop Resistance High

DTC 0038 Passenger Deployment Loop Resistance Low

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC
    • DTC 0037 will set when the SDM detects a high resistance condition in the I/P module deployment loop.
    • DTC 0038 will set when the SDM detects a low resistance condition in the I/P module deployment loop.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Diagnostic Aids

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:

    • An open or high resistance in the I/P module high or the I/P module low circuits
    • A short between the I/P module high and the I/P module low circuits
    • A malfunctioning inflatable restraint I/P module
    • An internal SDM malfunction

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .

Test Description

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

  1. This step tests to see if the malfunction is caused by the inflatable restraint I/P module.

    2.

  2. If DTC 0037 is present, test the I/P module high and the I/P module low circuits for an open or high resistance.

    If DTC 0038 is present, test for a short between the I/P module high and the I/P module low circuits.

Step

Action

Yes

No

Schematic Reference: SIR Schematics

Connector End View Reference: SIR Connector End Views

1

Did you perform a Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Is DTC 0037 or 0038 set as a current DTC?

Go to Step 3

Go to Diagnostic Aids

3
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel (I/P) module connector.
  3. Inspect both the component and harness sides of the I/P module connectors for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections .

Does the connector exhibit any signs of damage or corrosion?

Go to Step 4

Go to Step 5

4
  1. If the component side of the I/P module connector is damaged, the I/P module must be replaced. Refer to Inflatable Restraint Instrument Panel Module Replacement .
  2. If the harness side of the I/P module connector is damaged, replace the harness side of the connector. Refer to Connector Repairs .

Did you complete the replacement?

Go to Step 10

--

5

  1. Install EL-46867 SIR Driver/Passenger Load Tool to the I/P module harness connector.
  2. Connect the battery. Refer to Battery Negative Cable Disconnection and Connection .
  3. Use the scan tool in order to clear the DTCs.
  4. With the scan tool request the DTC display.

Does the scan tool indicate that DTC 0037 or 0038 is current?

Go to Step 6

Go to Step 8

6
  1. Turn OFF the ignition.
  2. Disconnect the sensing and diagnostic module (SDM) connector.
  3. Inspect the SDM connector for damage or corrosion that may cause a malfunction between the I/P module high and/or the I/P module low circuits. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 7

7

    • If DTC 0037 is present, test the I/P module high and the I/P module low circuits for an open or high resistance.
    • If DTC 0038 is present, test for a short between the I/P module high and the I/P module low circuits.
    • For all the above conditions, refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

8
  1. Turn OFF the ignition.
  2. Replace the I/P module. Refer to Inflatable Restraint Instrument Panel Module Replacement .

Did you complete the replacement?

Go to Step 10

--

9

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

Did you complete the replacement?

Go to Step 10

--

10
  1. Reconnect all SIR components.
  2. Verify that all components, connectors and connector position assurances (CPAs) are properly mounted.
  3. Use the scan tool in order to clear the DTCs.
  4. 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