B1615

DTC B1615

Circuit Description

The inflatable restraint front end sensor is a crash sensing device used in the detection of a frontal collision. The front end sensor is used by the inflatable restraint sensing and diagnostic module (SDM) to help determine whether or not certain frontal crashes are severe enough to warrant deployment of the frontal air bags. The SDM applies voltage to the sensor - reference circuit and monitors the voltage at the sensor - signal circuit in order to verify proper circuit integrity. If the SDM detects a malfunction within the sensor circuit, a DTC will be set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1615 Left Frontal Restraints Sensor

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The SDM detects a malfunction in the inflatable restraint front end sensor - left circuit.

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 front end sensor - left circuits
* A short to ground or voltage in the front end sensor - left circuits
* A short between the front end sensor - left circuits
* An internal front end sensor - left malfunction
* An internal SDM 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 9:

The number below refers to the step number on the diagnostic table.
6. Tests for an open, short to ground, or short to voltage in the front end sensor - left circuits.