B2128

DTC B2128

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 Descriptors
DTC B2128
- Trip Reset Button Stuck




Circuit/System Description

The instrument panel cluster (IPC) calculates the vehicle mileage based on the vehicle driven distance information from the engine control module (ECM). The ECM sends the vehicle driven distance information to the steering column control module (SCCM) via the serial data circuit. The SCCM sends a serial data message to the IPC indicating the vehicle driven distance. The IPC uses the vehicle driven distance data to calculate and display the vehicle odometer and trip odometer. The IPC detects the activation of the trip reset switch and a press and hold of the trip reset switch resets the trip odometer information to zero.


Conditions for Running the DTC

The ignition is in ACCESSORY or RUN.


Conditions for Setting the DTC

The IPC detects that the trip reset switch is stuck.


Action Taken When the DTC Sets

The IPC ignores the trip reset switch inputs.


Conditions for Clearing the DTC

* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The history DTC clears after 40 malfunction-free warm-up cycles.



Reference Information
Schematic Reference

Instrument Cluster Schematics (Instrument Cluster Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Instrument Cluster Description and Operation (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 Verification

Ignition ON, verify the odometer trip reset switch resets the trip odometer display when the switch is pressed.

If the odometer trip reset switch does not reset the trip odometer, replace the IPC.



Repair Instructions

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


Control Module References (Programming and Relearning) for the IPC replacement, setup and programming.