C0774

Less than 3900 kg (8600 lb) GVW


DTC C0774

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (with HP2) (Initial Inspection and Diagnostic Overview)Diagnostic System Check - Vehicle (without HP2) (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 ()
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

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

Circuit/System Verification

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