B1635

DTC B1635

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 B1635 Right Rear 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 rear 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 rear circuits
* An internal SIS - right rear malfunction
* An internal SIS - right front 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 10:

Step 11:

The number below refers to the step number on the diagnostic table.
5. This step tests for an open or high resistance in the SIS - right rear circuits.