GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Optra - Mexico 🢒 DTC 🢒 DTC 006

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

Upon passing this test, ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops.

The SDM checks the wiring connection to the I/P module by letting the infinitesimal current flow through the internal circuit and verifying the resistance.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC 006 Passenger Air Bag Deployment Loop Resistance Too Low

Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

Conditions for Setting the DTC
    • The resistance of passenger air bag deployment loop is lower than 1.4 ohms.
    • The shorting bar is damaged and then the SDM must be replaced.

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.

Step

Action

Values

Yes

No

Warning: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Warning in the Preface section.

Warning: Refer to Sensing and Diagnostic Module Handling Warning in the Preface section.

Schematic Reference: SIR Schematics

Connector End View Reference: Component Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Disconnect the negative battery cable.
  2. Disconnect the instrument panel (I/P) module.
  3. Disconnect the SDM connector.
  4. Test the resistance between the I/P module deployment hi and low circuits on the sensing and diagnostic module (SDM) side of the connector.

Does the ohmmeter show the specified value?

∞

Go to Step 3

Go to Step 5

3
  1. Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement.
  2. Connect the I/P module.
  3. Connect the negative battery cable.
  4. Use the scan tool in order to clear the DTCs.
  5. Perform the Diagnostic System Check - Vehicle.

Is DTC 006 still shown as a current fault?

--

Go to Step 4

Go to Step 6

4

Replace the I/P module. Refer to Inflatable Restraint Instrument Panel Module Replacement.

Did you complete the repair?

--

Go to Step 6

--

5

Replace the supplemental inflatable restraints (SIR) wiring harness.

Did you complete the repair?

--

Go to Step 6

--

6
  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