Diagnosis And Testing - Instrument Cluster: Notes
If all of the Instrument Panel Cluster (IPC) gauges and indicators are inoperative, be certain to check the IPC fused B(+) fuse and the IPC fused B(+) and ground circuits for shorts or opens. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.
If an individual hard wired gauge or indicator is inoperative, refer to the diagnosis and testing service information for that specific gauge or indicator. If an individual Controller Area Network (CAN) or Local Interconnect Network (LIN) data bus message-controlled gauge or indicator is inoperative, perform the Actuator Test as follows:
The IPC will automatically configure/program itself with the features and optional equipment of the vehicle in which it is initially installed. When the IPC is originally programmed, the Vehicle Identification Number (VIN) and other critical information is written and stored into Read Only Memory (ROM). Other stored information is learned through electronic messages received over the Controller Area Network (CAN) data bus and also through hard wired inputs when the IPC is electronically connected to the vehicle.
Once configured, the IPC memory may be irreparably damaged and certain irreversible configuration errors may occur if the IPC is connected electrically to another vehicle or if an electronic module from another vehicle is connected that provides data to the IPC (including odometer values) that conflicts with what is stored in other modules.
The practice of exchanging (swapping) the IPC and other electronic modules with those removed from another vehicle must always be avoided. Failure to observe this caution may result in irreversible damage to the IPC which is not reimbursable under the terms of the product warranty.
A service replacement IPC is provided with the correct VIN and certified odometer and engine hour values programed into its memory and will automatically configure features and optional equipment when installed.