B0000

DTC B0000

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (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 B0000 5A
- Vehicle Speed Information Circuit Plausibility Failure




Circuit/System Description

The radio receives a vehicle speed signal from the engine control module (ECM) 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 volts.



Conditions for Setting the DTC

DTC B0000 5A will set when one or both of the following conditions are present:

* Vehicle speed from serial data is more than 5 km/h (3 mph) and vehicle speed pulse from the ECM 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 ECM is 0 km/h (0 mph) for 10 seconds continuously.



Action Taken When the DTC Sets

No action taken when DTC sets.


Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.



Reference Information
Schematic Reference

Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Radio/Audio System Description and Operation (Radio/Audio System 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 Testing

1. Ignition OFF, disconnect the X4 harness connector at the radio.
2. Ignition ON, test for less than 1 volt between the vehicle speed sensor signal circuit terminal 15 and ground.

• If greater then the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

3. Ignition OFF, test for less than 10 ohms between the vehicle speed sensor signal circuit terminal 15 and ground.

• If greater then the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Ignition OFF, disconnect the X1 harness connector at the ECM.
5. Ignition OFF, test for infinite resistance between the vehicle speed sensor signal circuit terminal and ground.

• If less then the specified value, test the signal circuit for a short to ground.

6. If all circuits test normal, replace the radio.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning) for ECM and Radio replacement, setup, and programming