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 provide an overview of each diagnostic category.

### DTC Descriptor

DTC C0775: Low Tire Pressure System Sensors Not Learned

### Circuit/System Description

The body control module (BCM) receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensors RF transmission contains its own unique identification (ID) code that must be learned into the BCM memory. Once all 4 IDs have been learned and vehicle speed is 25 mph, or greater, the BCM continuously compares IDs in received transmission to its learned IDs to determine if all 4 sensors are present.

### Conditions for Running the DTC

The ignition is ON.

### Conditions for Setting the DTC

The BCM has not undergone the tire pressure sensor learn procedure.

### Action Taken When the DTC Sets

The driver information center (DIC) displays the SERVICE TIRE MONITOR warning message.

### Conditions for Clearing the DTC

• | A current DTC will clear when the BCM has undergone the sensor learn procedure.

• | The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

### Diagnostic Aids

A newly replaced BCM will set DTC C0775 on its initial ignition ON cycle.

### Reference Information

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Scan Tool Data List

#### Special Tools

J-46079 Tire Pressure Monitor Diagnostic Tool

### Circuit/System Testing

Perform the tire pressure sensor learn procedure.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Control Module References for BCM replacement, setup, and programming

• | Tire Pressure Sensor Learn