B1650

DTC B1650

CIRCUIT DESCRIPTION
The inflatable restraint passenger presence system circuit consists of the inflatable restraint sensing and diagnostic module (SDM) and the passenger presence system (PPS). The PPS is used by the SDM to determine whether or not the instrument panel (I/P) module, side impact module - RF and seat belt pretensioner - RF should be deployed. If the SDM detects a malfunction within the PPS circuit, a DTC will be set.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1650 Passenger Presence System Malfunction

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 passenger presence system.

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 passenger presence system circuits
- A short to ground or voltage in the passenger presence system circuits
- A low resistance in the passenger presence system circuits
- A passenger presence system 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 - 6:

The number below refers to the step number on the diagnostic table.
4. This step tests for an open, short to ground, or short to voltage in the front end sensor - right circuits.