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 Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST DESCRIPTION

Steps 1 - 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.