B124F

DTC B124F

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B124F 41
- MOST Programming Failure Files Not Available

DTC B124F 42
- MOST Programming Failure Not Programmed

DTC B124F 44
- MOST Programming Failure Security Access Not Activated

DTC B124F 4A
- MOST Programming Failure Security Checksum Error

Circuit/System Description

The instrument cluster can communicate with other devices on a Media Oriented Systems Transport (MOST) protocol and through the USB port. Software checks are performed to ensure the internal MOST circuitry is operating properly.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The Instrument Cluster has detected an internal memory malfunction.

Action Taken When the DTC Sets

The DTC is stored in the Instrument Cluster memory.

Conditions for Clearing the DTC

The Instrument Cluster no longer detects a malfunction.

Reference Information

Schematic Reference

Instrument Cluster Schematics Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Instrument Cluster Description and Operation Instrument Cluster

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify DTC B124F is not set.

• If the DTC is set

1. Program the P16 Instrument Cluster.

2. Verify the DTC is not set.

• If the DTC is set, replace P16 Instrument Cluster.

• If the DTC is not set

3. All OK.

• If the DTC is not set

3. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

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