For 1990-2009 cars

## DTC B1000 PPS

### 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 B1000 00: Electronic Control Unit (ECU) Performance No Additional Information Available
DTC B1000 33: Electronic Control Unit (ECU) Performance Special Memory Failure
DTC B1000 34: Electronic Control Unit (ECU) Performance RAM Integrity
DTC B1000 35: Electronic Control Unit (ECU) Performance ROM Integrity
DTC B1000 36: Electronic Control Unit (ECU) Performance EEPROM Integrity
DTC B1000 37: Electronic Control Unit (ECU) Performance Watchdog Failure
DTC B1000 39: Electronic Control Unit (ECU) Performance Internal Electronic Failure
DTC B1000 43: Electronic Control Unit (ECU) Performance EEPROM Error
DTC B1000 56: Electronic Control Unit (ECU) Performance Allowable Number of Transitions/Events Exceeded
DTC B1000 73: Electronic Control Unit (ECU) Performance Parity Error

### Circuit/System Description

This diagnostic is specific to the passenger presence system (PPS) module. The internal fault detection is typically handled inside the control module, however the PPS module may set DTC B1000 due to other system malfunctions.

### Conditions for Running the DTC

The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.

### Conditions for Setting the DTC

The module has detected an internal malfunction or a specific sensor circuit may be shorted.

### Action Taken When the DTC Sets

The module refuses all additional inputs.

### Conditions for Clearing the DTC

• | A current DTC clears when the malfunction is no longer present.

• | A history DTC clears when the module ignition cycle counter reaches the reset threshold of 100, without a repeat of the malfunction.

### Diagnostic Aids

• | DTC B1000 may set in the PPS module due to shorted circuits of the PPS pressure sensor or the seat belt tension sensor.

• | This DTC may be stored as a history DTC without affecting the operation of the module.

• | If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.

### Circuit/System Verification

Ignition ON, with a scan tool, clear DTC. Verify DTC B1000 is not set as current in the PPS.

⇒ | If DTC is set as a current DTC, replace the PPS.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for PPS replacement, setup, and programming