For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptors

DTC B0080 02: Passenger Seat Position Sensor Low Voltage
DTC B0080 05: Passenger Seat Position Sensor Circuit Open
DTC B0080 08: Passenger Seat Position Sensor Circuit Voltage Range/Performance
DTC B0080 5A: Passenger Seat Position Not Configured

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
RF Seat Position Sensor Signal | B0080 02 | B0080 05 | B0080 08 | B0080 08
RF Seat Position Sensor Low Reference | -- | B0080 05 | B0080 08 | B0080 08

### Circuit/System Description

The seat position sensor is used to determine the proximity of a front passenger seat position with respect to the inflatable restraint I/P module. The seat position sensor is a hall effect sensor that is mounted on the seat track of the front passenger seat. The seat position sensor is connected to the sensing and diagnostic module (SDM) with a low reference and a signal circuit. The SDM uses the state of the seat position sensor to determine the need for a stage 2 deployment of the inflatable restraint I/P module. When the seat is in the forward position stage 2 deployment is disabled, and when in the rearward position stage 2 deployment is enabled. The SDM monitors the RF seat position sensor signal circuit and if a fault is detected, the SDM will set DTC B0080 and defaults to disabling stage 2 inflatable restraint I/P module deployment.

### Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

### Conditions for Setting the DTC

Any of the following conditions must exist for 1 second:

#### B0080 02

The SDM detects the RF seat position sensor signal circuit is shorted to ground.

#### B0080 05

The SDM detects the RF seat position sensor signal circuit is shorted to voltage.

#### B0080 04

The SDM detects the RF seat position sensor signal circuit is open for 500 milliseconds.

#### B0080 08

The SDM detects an invalid signal on the RF seat position sensor signal circuit.

### Action Taken When the DTC Sets

• | The SDM defaults the seat position sensor to seat forward threshold.

• | The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

### Conditions for Clearing the DTC

• | The condition for setting the DTC no longer exists.

• | A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

### Reference Information

#### Schematic Reference

SIR Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

SIR System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, observe the SDM Passenger Seat Position Sensor Status parameter while moving the passenger seat fully forward and fully rearward. The parameter should cycle between Forward to Rearward as the seat is moved in the respective direction and DTC B0080 should not set.

⇒ | If the parameters are correct and DTC B0080 is set, replace the SDM.

### Circuit/System Testing

Important: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:

• | Seat position sensor

• | SDM

• | Seat position sensor wiring harness connector

• | SDM wiring harness connector

1. Ignition OFF, disconnect the harness connector at the RF seat position sensor.
2. Test for less than 10 ohms between low reference circuit terminal 1 and ground.

⇒ | If greater than the specified range, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the SDM.

3. Ignition ON, test for 4.5 - 5.5 volts between the signal circuit terminal 2 and ground.

⇒ | If less that the specified range, test the signal circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the SDM.

⇒ | If greater that the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the SDM.

4. If the circuits test normal, test or replace the seat position sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for SDM replacement, setup, and programming