The inflatable restraint seat position sensor (SPS) is used to determine the proximity of a front driver or passenger seat position with respect to the frontal air bag. The SPS interfaces with the sensing and diagnostic module (SDM). The state of the SPS allows the SDM to disable stage 2 of the frontal air bag for a front seat that is forward of a forward/rearward point in seat track travel. The SPS is a hall effect sensor that is mounted near the seat track of both the driver and passenger seats. The seat track includes a metal bracket that shunts the SPS magnetic circuit creating 2 states of seat position. The shunted state represents a rearward seat position. The non-shunted state represents a forward position. The SPS provides 2 current ranges, one range for the shunted state and a second range for a non-shunted state. These 2 states are inputs to the SDM. State 1 (shunted) being the rearward threshold and state 2 (non-shunted) being the forward threshold. When the SDM receives input from a SPS that state 1 threshold is reached (seat is rearward) the SDM will not disable stage 2 deployment, if required by the deployment sensors. When state 2 threshold is reached (seat is forward) the SDM will disable stage 2 deployment on the side the seat is forward. The SDM monitors the SPS circuit and if a fault is detected the SDM will set codes B0083 or B0084 and defaults to disabling stage 2 frontal deployment. This will only default on the side of the vehicle the sensor has a fault. Its important to understand that the SPS is secondary to the passenger presence system (PPS) and the manual instrument panel (I/P) module disable switch. If either one of these devices are in the disable mode the passenger air bag will not deploy regardless of the SPS status.

Ignition voltage is between 9-16 volts.

DTC B0083 and B0084 will set when one of the following conditions occur:

The following can cause an intermittent condition:

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

1. With the ignition OFF, disconnect the SPS connector.

⇒	If DTC B0083 is present, disconnect the right SPS located on the RF outboard seat track.

⇒	If DTC B0084 is present, disconnect the left SPS located on the LF outboard seat track.

2. Test and inspect the component signal and ground circuits for damage or corrosion.
3. Replace the defective SPS.

⇒	If DTC B0083 is present, replace the right SPS located on the RF outboard seat track.

⇒	If DTC B0084 is present, replace the left SPS located on the LF outboard seat track.

4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0083 and/or B0084 is cleared.
5. If DTC does not clear remove the inflatable restraint SDM connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the SPS high and/or low circuits.

⇒	If damage or corrosion is found make the appropriate repair.

6. Test the high and low circuits between the SDM and SPS for a short to voltage, short to ground, or open/low resistance.

⇒	If circuits test good then replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.