B0045

DTC B0040, B0041, or B0045

Circuit Description

The driver side deployment loop consists of the following components:

* An inflatable restraint side impact module LF
* The side impact module LF high circuits
* The side impact module LF low circuits

A shorting bar is used within the side impact module LF connector. The shorting bar will short together the side impact module LF high circuit and the side impact module LF low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the side impact module LF. 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 in memory.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

* DTC B0040 Left Front Side Deployment Loop Resistance Low
* DTC B0041 Left Front Side Deployment Loop Open
* DTC B0045 Left Front Side Deployment Loop Voltage Out of Range

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

* DTC B0040 will set when the SDM detects the LF side impact module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

* DTC B0041 will set when one of the following conditions occurs:

- The SDM detects the LF side impact module deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.
- The SDM detects the voltage at the LF side impact module high control is less than 2.4 volts and LF side impact module deployment loop resistance is 6 ohms or greater for 500 milliseconds.

* DTC B0045 will set when one of the following conditions occurs:

- The SDM detects the voltage at the LF side impact module high control is greater than 6 volts for 500 milliseconds.
- The SDM detects the voltage at the LF side impact module high control is less than 2.4 volts and the LF side impact module deployment loop resistance is less than 6 ohms for 500 milliseconds.

Action Taken When the DTC Sets

The SDM commands ON the AIR BAG indicator via class 2 serial data.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* You issue a scan tool CLEAR DTCs command.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Diagnostic Aids

The following are possible causes of the malfunction:

* A short between the side impact module LF high and low circuits
* An open or a high resistance in the side impact module LF high or low circuits
* A short to ground or a short to voltage in the side impact module LF high or low circuits
* The side impact module LF connector
* The SDM connector
* A malfunctioning side impact module LF
* A malfunctioning SDM

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. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics

Test Description

Step 1 - Step 8:

Step 9:

The number below refers to the step number on the diagnostic table.
6 This step tests to see what DTCs are present. If DTC B0040 is present, test the side impact module LF for a short between high and low circuits. If DTC B0041 is present, test the side impact module LF high and low circuits for an open and for high resistance. If DTC B0045 is present, test the side impact module LF high and low circuits for a short to ground or a short to voltage.