Odometer Trip/Reset Switch Inoperative

Odometer Trip/Reset Switch Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach
* Diagnostic Procedure Instructions provides an overview of each diagnostic category

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview






Circuit/System Description

The driver information center (DIC) switch is a multiplexed switch. Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a ground reference. The switch input to the IPC is pulled low or grounded when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs.

The Trip A/B switch is monitored on a separate circuit provided by the IPC.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch assembly.
2. Ignition OFF, test for less than 1 ohm of resistance between the Trip A/B ground circuit and ground.

• If greater than 1 ohm, test the ground circuit for an open/high resistance.

3. Ignition ON, scan tool installed, verify that the Trip A/B Switch parameter in the IPC Data List is Inactive.

• If not Inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC).

4. Ignition ON, install a 3-Amp fused jumper wire between the Trip A/B switch signal circuit and the ground circuit. Verify that the scan tool Trip A/B Switch parameter in the IPC Data List is Active.

• If not Active, test the Trip A/B switch signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.

5. If all circuits test normal, test or replace the DIC switch.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Instrument Panel Dimmer Switch Replacement
* Refer to Programming and Relearning Programming and Relearning