C0774

DTC C0774

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0774 00
- Low Tire Pressure System Performance

Circuit Description

The electronic brake control module (EBCM) receives a serial data message from the tire pressure monitor (TPM) system when low tire pressure is detected. The EBCM will adjust the responses of vehicle stability enhancement system (VSES) to have optimal vehicle control when active.

Conditions for Running the DTC

* Vehicle speed is 32 km/h (20 mph), or greater for 1 minute.
* VSES is active.

Conditions for Setting the DTC

The EBCM receives a serial data message of low tire pressure is detected.

Actions Taken When the DTC Sets

* The EBCM adjusts the VSES responses to compensate for a low tire pressure condition to maintain optimal control of the vehicle.
* No warning indicators and/or messages will be displayed.

Conditions for Clearing the DTC

* A current DTC will clear when the TPM system is reset.
* A history DTC will clear after 100 consecutive malfunction-free ignition cycles from when the TPM system has been reset.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (ABS (Non-Hybrid Less than 3900 kg (8600 lb) GVW))
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Verify tire pressure. Refer to Symptoms - Tire Pressure Monitoring (Symptoms - Tire Pressure Monitoring).