For 1990-2009 cars

### 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 deployment loops.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC 009 Left Pretensioner Deployment Loop Resistance Too High

### Conditions for Running the DTC

Ignition voltage is within the normal operating voltage range.

### Conditions for Setting the DTC

The resistance of the left belt pretensioner deploy loop is over 3.1 ohms.

### 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
--- | --- | --- | --- | ---
Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section. Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section. Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Disconnect the negative battery cable.
2. Test the resistance of the left seat belt pretensioner deployment hi and low circuits.

Does the ohmmeter show the specified value?

0 Ω

Go to Step 3

Go to Step 5

3 |

1. Replace the sensing and diagnostic module (SDM). Inflatable Restraint Sensing and Diagnostic Module Replacement.
2. Connect the negative battery cable.
3. Use the scan tool in order to clear the DTCs.
4. Perform the Diagnostic System Check - Vehicle.

Is DTC 009 still shown as a current fault?

--

Go to Step 4

Go to Step 6

4 | Replace the left seat belt pretensioner module. Refer to Front Seat Belt Replacement in seat belts. 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