Chevrolet Trax: DTC B0000: Vehicle speed information circuit not plausible

DIAGNOSTIC CODE INDEX

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.

DTC Descriptor

DTC B0000 5A

Vehicle Speed Information Circuit Not Plausible

Diagnostic Fault Information

Circuit/System Description

The radio receives a vehicle speed signal from the electronic brake control module in order to correlate actual vehicle speed to the movement of the vehicle calculated by the navigation system and reported serial data.

Conditions for Running the DTC

• Radio ON.
• Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

• Vehicle speed from serial data is more than 5 km/h (3 mph) and vehicle speed pulse from the electronic brake control module is 0 km/h (0 mph).
• Vehicle speed calculated from the navigation processing software is more than 36 km/h (22 mph) and vehicle speed pulse from the electronic brake control module is 0 km/h (0 mph) for 10 seconds continuously.

Action Taken When the DTC Sets

• Turn by turn route navigation may be inoperative.
• Vehicle indicated location may be inaccurate.

Conditions for Clearing the DTC

• The condition responsible for setting the DTC no longer exists.
• A history DTC clears after 100 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Radio/Navigation System Schematics (Encore), Radio/Navigation 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

Radio/Audio System Description and Operation (with Monochrome Display), Radio/Audio System Description and Operation (with Color Display)

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 Testing

NOTE: Diagnose any antilock brake system (ABS) related DTCs before performing this diagnostic.

1. Ignition OFF, disconnect the X4 harness connector at the A11 Radio.
2. Ignition ON.
3. Test for less than 1 V between the signal circuit terminal 20 and ground.

If 1 V or greater

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.

   Ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• f 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K17 Electronic Brake Control Module.

If less than 1 V

4. Test for 3-7 Hz between the signal circuit terminal 20 and ground while operating the vehicle drive wheels at 5 mph (8 km/h).

If not 3-7 Hz

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
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

3. 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 K17 Electronic Brake Control Module.

If 3-7 Hz

5. Test or replace the A11 Radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for radio or electronic brake control module replacement, programming, and setup.

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