Hourmeter Inaccurate or Inoperative

HOURMETER INACCURATE OR INOPERATIVE

DIAGNOSTIC FAULT INFORMATION
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

CIRCUIT/SYSTEM DESCRIPTION
The instrument panel cluster (IPC) can display the accumulated engine run time hours when the cluster is in the OFF AWAKE or ACC, RAP and in the RUN positions. The IPC stores the accumulated engine run time hours in a non-volatile format. The hourmeter will update every 6 minutes and will not change if the battery is disconnected or removed.

CIRCUIT/SYSTEM TESTING
1. Verify the hourmeter operation.
- If the hourmeter does not operate properly, replace the IPC.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Instrument Cluster Description and Operation
- Control Module References for IPC and ECM replacement, setup, and programming. Programming and Relearning Verification Tests