B1625

DTC B1625

CIRCUIT DESCRIPTION
The inflatable restraint side impact sensor (SIS) is a crash sensing device used in the detection of a side impact collision. The SIS is used to monitor vehicle velocity changes to detect side impact crashes that are severe enough to warrant deployment of the inflatable restraint side impact module. The SIS receives power and ground from the inflatable restraint sensing and diagnostic module (SDM). The SIS communicates the status of the side impact air bag system to the SDM via a diagnostic line. If the SDM detects a malfunction within the SIS circuit, a DTC will be set.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1625 Right Front/Passenger Side Impact Sensor (SIS) Performance

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 SIS - right circuits.

ACTION TAKEN WHEN THE DTC SETS
The SDM commands the AIR BAG indicator to flash.

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 SIS - right front circuits
- A short to ground or voltage in the SIS - right front circuits
- A short to ground or voltage in the SIS - right rear circuits
- A short between the SIS - right front circuits
- A short between the SIS - right rear circuits
- An internal SIS - Right 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 - 10:

Steps 11 - 12:

The numbers below refer to the step numbers on the diagnostic table.
5. This step tests for an open, short to ground, short to voltage or short between the SIS - right front circuits.
8. This step tests for a short to ground, short to voltage or short between the SIS - right rear circuits.