For 1990-2009 cars only
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 B0074 00: Passenger Occupant Classification Sensor CircuitDTC B0074 04: Passenger occupant Classification Sensor Open Circuit
Circuit/System Description
When the ignition is turned ON, the passenger presence system (PPS) module continually monitors the status of the seat flex mat if the flex mat does not communicate or the PPS module determines the flex mat has an internal malfunction DTC B0074 will set.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
| • | The SDM has received a fault message from the PPS module. |
| • | DTC B0074 is a type B DTC. |
Action Taken When the DTC Sets
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
Connector End View Reference
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Verify DTC B0074 is not set.
| ⇒ | If the DTC is set, replace the flex mat. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for PPS and SDM replacement, setup, and programming |
