Review
The instrument panel is a fully electronic device that receives analog or digital signals via wired connections or data buses and uses them to control instruments. Signals processed by the engine control unit (ECM), are transmitted via the CAN bus to the instrument panel and are displayed as analog displays or illuminated indicator lamps. The instrument panel is connected to the vehicle's electrical system through a connector that provides all input and output connections. None of the elements of the instrument panel require maintenance. The instrument panel has two main functions of providing the driver with information about the state of the car and processing/switching digital signals. The instrument panel analyzes the received signals and displays the corresponding messages on the display of the information center. For system information:
For more information refer to: Instrument panel (413-01 Instrument panel, Description and function) / Communication network (418-00 Communication network of modules, Description and principle of operation).
Vehicle configuration file (CCF)
CAUTION: If a new instrument panel is to be installed, the instrument panel replacement procedure must be followed using the approved diagnostic system. This makes sure that the car configuration file (CCF) is correctly transferred from the ECM to the new instrument cluster. If the vehicle is service modified from the original factory specification, the CCF will also require an update with an approved diagnostic system. This may include dealer installation of non-standard wheels and/or tires and optional electrical interface accessories such as a parking system.
The CCF contains all relevant data on the specification and sales condition of the respective vehicle, immobilization codes and driver personalization. This information is stored by the engine control unit (ECM) and instrument panel, allowing each system module to detect which systems and components are installed on the vehicle. Information is constantly transferred between these two modules of the system, providing continuous duplication of data between modules.
Inspection and verification
1. Check the customer's complaint.
2. Confirm which, if any, warning lights are on on the instrument panel.
3. Visually inspect for obvious electrical problems.
Visual check table
Electrical equipment:
- The battery and fuses of the electrical junction box in the passenger compartment
- Read diagnostic trouble codes (DTC)
- Using an Approved Diagnostic System or Scan Tool
- Damaged, loose, or corroded electrical connectors
- Instrument panel for any internal damage
- Electrical circuits
4. If there is an obvious reason for the problem you identified or described by the client, eliminate it before proceeding to further actions (if possible).
5. Use an approved diagnostic system or scan tool (tester), to retrieve all DTCs before accessing the DTC Index (DTC). Clear all DTCs after troubleshooting.
See section 100-00 for a complete list of DTCs that can be logged in the vehicle. For more information, see: How to use this manual (100-00 General information, Description and principle of operation).
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