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Instrument Cluster - Instrument Cluster Diagnosis and Testing Principles of Operation For a detailed description of the Instrument Cluster, refer to the relevant Description and Operation section in the Instrument Cluster (413-01 Instrument Cluster, Description and Operation). Inspection and Verification CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor 1. Verify the customer concern. 1. 2. Visually inspect for obvious signs of mechanical or electrical damage and system integrity. 2. Visual Inspection Mechanical Electrical Fluid levels Fuse 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step 3. 4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index. 4. DTC Index • NOTE: If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the • NOTE: Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the • NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal • NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests. • NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may REFER to: Diagnostic Trouble Code (DTC) Index - DTC: Instrument Cluster (IPC) (100-00 General Information, Description and Operation). |