For 1990-2009 cars

### 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 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

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Instrument Cluster 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

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 after completing the diagnostic procedure.

Control Module References for the IPC replacement, setup and programming.