B1786

DTC B1786

Circuit Description

The passenger presence system (PPS) sensor - right front circuit consists of the PPS sensor - right front and the PPS module. The PPS module monitors the PPS sensor - right front. If the sensing and diagnostic module (SDM) detects the PPS module has received a collision detection signal, a DTC will be set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1786 Passenger Presence System Collision Detected - Right Front

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The SDM detects the PPS module has received a collision detection signal.

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:

* PPS not properly calibrated
* A malfunctioning PPS sensor - right front
* An internal PPS module 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 7:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests to see if the malfunction is caused by the PPS calibration.
4. This step tests to see if the malfunction is caused by the PPS sensor - right front.