For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using the 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 C0775: Air Pressure Warning
DTC C0776: Air Pressure Warning
DTC C0777: Air Pressure Warning
DTC C0778: Air Pressure Warning

### Circuit/System Description

TPMS Receiver Module receives the vehicle speed signal from the transmission control module (TCM) and also receives the information of the tire inflation pressure from the transmitters and the transmitter’s condition. With this information, the TPMS decides if warning lamp indication is needed or not.

### Conditions for Running the DTC

Vehicle speed is above 32 km/h (20 mph).

### Conditions for Setting the DTC

The tire inflation pressure is lower than 179 Kpa (26 psi)

### Action Taken When the DTC Sets

TPMS warning lamp blinks for 75 seconds.

### Conditions for Clearing the DTC

The conditions that set the DTC are no longer present, the DTC can be cleared by scan tool.

### Reference Information

#### Schematic Reference

Tire Pressure Monitoring System Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Electronic Brake Control Module Scan Tool Information

### Circuit Verification

Inflate the tire to the proper specification.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Tire Pressure Monitor System Configuration for TPM module setup, and programming