Chevrolet Trax: Symptoms - antilock brake system

NOTE: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

• There are no DTCs set
• The control modules can communicate via the serial data link

2. Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Description and Operation

Visual/Physical Inspection

• Inspect for aftermarket devices which may affect the operation of the ABS. Refer to Checking Aftermarket Accessories
• Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• ABS Indicator Malfunction
• Brake Warning Indicator Malfunction (Without J41) , Brake Warning Indicator Malfunction (With J41)
• Traction Control/Stability Control Indicator Malfunction (With C67/CJ2), Traction Control/Stability Control Indicator Malfunction (With C60/C41)

ABS INDICATOR MALFUNCTION

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.

Circuit/System Description

The instrument cluster turns the ABS indicator on for five seconds after the ignition is turned on, or when the electronic brake control module detects a fault it sends a serial data message to the instrument cluster commanding the indicator on.

Reference Information

Schematic Reference

Antilock Brake System Schematics (Encore), Antilock Brake System Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - (Trax)

Description and Operation

ABS Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify that no DTCs are set.

If any DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

If no DTCs are set

3. Verify that the Instrument Cluster ABS indicator turns On and Off when commanding the All Indicators On and Off with a scan tool.

If the ABS indicator does not turn On and Off

Replace the P16 Instrument Cluster.

If the ABS indicator turns On and Off

4. Verify the ABS indicator turns Off 5 seconds after ignition On.

If the ABS indicator does not turn Off

Replace the K17 Electronic Brake Control Module.

If the ABS indicator turns OFF

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Instrument Cluster replacement, programming and setup.

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