B1653

DTC B1653

CIRCUIT DESCRIPTION
The seat position sensor circuit consists of the seat position sensor, seat position sensor - high and the seat position sensor - low circuits and the sensing and diagnostic module (SDM). The seat position sensor monitors seat position for the SDM. If the SDM detects a malfunction within the seat position sensor circuit, a DTC will be set.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1653 Driver Seat Position Sensor Assembly

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
The SDM detects a seat position sensor malfunction.

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 seat position sensor - high or the seat position sensor - low circuits
- A short to ground in the seat position sensor - high or the seat position sensor - low circuits
- A short to voltage in the seat position sensor - high or the seat position sensor - low circuits
- A short between the seat position sensor - high or the seat position sensor - low circuits
- A malfunctioning seat position sensor
- 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:

The numbers below refer to the step numbers on the diagnostic table.
6. Tests the seat position sensor - high and the seat position sensor - low circuits for an open or high resistance.Tests the seat position sensor - High and the Seat Position Sensor - Low circuits for a short to ground.Tests the seat position sensor - High and the Seat Position Sensor - Low circuits for a short to voltage.
8. This step tests to see if the malfunction is caused by the seat position sensor.