Chevrolet Trax: Charge 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 engine Control Module (ECM) uses the generator turn ON signal circuit to control the load of the generator on the engine. A high side driver in the ECM applies voltage to the voltage regulator. This signals the voltage regulator to turn the field circuit ON and OFF. The ECM monitors the state of the generator turn ON signal circuit. The ECM should detect low voltage on the generator turn on signal circuit when the ignition is ON and the engine is OFF, or when the charging system malfunctions. With the engine running, the ECM should detect high voltage on the generator turn on signal circuit. The ECM performs key ON and RUN tests to determine the status of the generator turn on signal circuit. If a malfunction is detected the ECM will illuminate the charge indicator in the instrument cluster.

Reference Information

Schematic Reference

Instrument Cluster Schematics (Encore), Instrument Cluster 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

Indicator/Warning Message 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, engine running.
2. Verify the scan tool Battery Voltage parameter is between 12.5-15.5 V.

• If not 12.5-15.5 V

Refer to Charging System Test .

• If 12.5-15.5 V

3. Verify the charge indicator turns on and off when commanding the All Indicators test ON and OFF with the scan tool.

• If the charge indicator always stays on or always stays off

Replace the P16 Instrument Cluster.

• If the charge indicator turns on and off as commanded

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Instrument Cluster replacement, programming, and setup

CHIME 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 radio generates the audible warnings. The instrument cluster, the body control module (BCM), the inflatable restraint sensing and diagnostic module (SDM) or the object alarm module request audible warnings via serial data.

Reference Information

Schematic Reference

Audible Warnings Schematics (Encore), Audible Warnings 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

Audible Warnings 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

NOTE: Before performing this diagnostics, make sure no indicators are illuminated after the instrument cluster performs a lamp test. If any indicators are illuminated after the bulb test, perform the indicator diagnostics before this diagnostics.

1. Ignition ON.
2. Verify all the radio speakers operate by adjust the radio balance and fade to each speaker.

• If any speaker does not operate properly

Refer to Speaker Malfunction .

• If the speakers operate properly

3. Verify the scan tool Driver Seat Belt Status and Passenger Seat Belt Status parameters are Buckled when both front seat belts are buckled.

• If not Buckled

Refer to Seat Belt Indicator Malfunction - Driver .

• If buckled

4. Verify the scan tool Headlamp On Switch parameter is Inactive when the headlamps are OFF.

• If not Inactive

Refer to Headlamps Malfunction .

• If Inactive

5. Verify the scan tool Park Lamps Switch parameter is Inactive when the park lamp switch is OFF.

• If not Inactive

Refer to Park, License, and/or Tail Lamps Malfunction .

• If Inactive

6. Verify the scan tool Left Turn Signal Switch and Right Turn Signal Switch parameters are Inactive while the turn signal switch is OFF.

• If not Inactive

Refer to Turn Signal Lamps and/or Indicators Malfunction

• If Inactive

7. Verify the scan tool Park Brake Switch parameter is Inactive when the park brake is OFF.

• If not Inactive

Refer to Park Brake System Diagnosis (Drum Brake) , Park Brake System Diagnosis (Disc Brake) .

• If Inactive

8. Verify that all scan tool parameters listed below are Inactive when all the doors are closed.

• Driver Door Ajar Switch
• Passenger Door Ajar Switch
• Left Rear Door Ajar Switch
• Right Rear Door Ajar Switch
• If not Inactive

Refer to Door Ajar Indicator Malfunction .

• If Inactive

9. Verify the scan tool Key in Ignition Status parameter is Inactive when the key is out of the ignition.

• If not Inactive

Refer to Circuit/System Testing.

• If Active

10. All OK

Circuit/System Testing

1. Ignition ON, disconnect the harness connector at the S39 Ignition Switch while the ignition is ON.
2. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.

• If the test lamp does not illuminate and the circuit fuse is good

Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open

1. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance

2. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K9 Body Control Module.

If the test lamp illuminates

3. Verify the scan tool Key in Ignition Status parameter is Inactive.

If not Inactive

1. Disconnect the X3 harness connector at the K9 Body Control Module.
2. Test for less than 1 V between the signal circuit terminal 4 and ground.

• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K9 Body Control Module.

If Inactive

4. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the B+ circuit terminal 2.
5. Verify the scan tool Key in Ignition Status parameter is Active.

If not Active

1. Ignition OFF, disconnect the X3 harness connector at the K9 Body Control Module.
2. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K9 Body Control Module.
• If Active

6. Test or replace the S39 Ignition Switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for BCM or Radio replacement, programming and setup

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