Review
The instrument cluster is a fully electronic device that receives analog or digital signals via wired connections or data buses and uses them to control the instruments. The signals, which are processed by the engine control module (ECM), are transmitted via the CAN bus to the instrument cluster and are displayed as analog indicators or illuminated warning lights. The instrument cluster is connected to the vehicle's electrical system via a connector that provides all input and output connections. None of the components of the instrument cluster require maintenance. The instrument cluster has two main functions: providing the driver with information about the state of the vehicle and processing/switching digital signals. The instrument cluster analyzes the signals received and displays the corresponding messages on the information center display. For information on the operation of the systems:
For more information, see: Instrument Cluster (413-01 Instrument cluster, Description and operating principle) / Communication network (418-00 Communication network modules, Description and operating principle).
Vehicle Configuration File (CCF)
CAUTION: If a new instrument cluster is to be installed, the Instrument Cluster Replacement procedure must be performed using the approved diagnostic system. This ensures that the Vehicle Configuration File (CCF) is correctly transferred from the ECM to the new instrument cluster. If the vehicle is serviced from the original factory specification, the CCF will also require updating using the approved diagnostic system. This may include the dealer installing non-standard wheels and/or tires and optional electrical interface accessories such as parking assist systems.
The CCF contains all relevant data about the specification and sales status of the relevant vehicle, immobilization codes and personal driver settings. This information is stored in the engine control module (ECM) and the instrument cluster, allowing each system module to detect which systems and components are installed on the vehicle. The information is constantly transferred between these two system modules, ensuring continuous data duplication between the modules.
Inspection and verification
1. Check the customer complaint.
2. Confirm which, if any, indicator lights are illuminated on the instrument panel.
3. Visually inspect for obvious electrical problems.
Visual inspection table
Electrical equipment:
- Battery and fuses for the electrical distribution box in the passenger compartment
- Read diagnostic trouble codes (DTCs)
- Use of an approved diagnostic system or scan tool
- Damaged, loose or corroded electrical connectors
- Instrument cluster for any internal damage
- Electrical circuits
4. If an obvious cause for the problem you identified or the customer described is found, resolve it before proceeding with further actions (if possible).
5. Use the approved diagnostic system or scan tool to retrieve all diagnostic trouble codes (DTCs) before accessing the DTC Index. Clear all DTCs after troubleshooting.
For a complete list of diagnostic trouble codes that may be stored in the vehicle, see Section 100-00. For additional information, refer to: How to Use This Manual (100-00 General information, Description and operating principle).
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