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Test 3A - Electronic Instrument Cluster (EIC) Fault Codes

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Perform TEST VER - 1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Observe DRB-II screen for fault codes. Read and note fault codes displayed. Perform corresponding procedure(s)/test indicated in INSTRUMENT CLUSTER FAULT CODES  table.
    INSTRUMENT CLUSTER FAULT CODES

    Fault Code Perform TEST
    Display Driver Failure 10 (1) *
    Microcomputer Internal Failure 20 (1) *
    No Bus Activity 01 48A 
    No Body Controller Message 02 49A 
    No Powertrain Control Module (PCM) Message 04 (2) *
    Bus Loop Message Failure 08 (1) *
    Power Supply Short Circuit 40 (1) *
    Body Computer Odometer Failure 80 (3) *
    (1) Replace instrument cluster.
    (2) Continue TEST 3A, go to step 2).
    (3) Replace body controller.
  2. Ensure ignition is off. Disconnect EIC and Powertrain Control Module (PCM). PCM is located between data link connector and battery on fenderwell.
  3. Using an external ohmmeter, check resistance on CCD bus positive circuit (Violet/Brown wire) between PCM connector terminal No. 26 and EIC connector terminal No. 10.
  4. If resistance is more than 5 ohms, repair open Violet/Brown wire. If resistance is less than 5 ohms, check resistance on CCD bus negative circuit (White/Black wire) between PCM connector terminal No. 46 and EIC connector terminal No. 9.
  5. If resistance is more than 5 ohms, repair open White/Black wire. If resistance is less than 5 ohms, replace PCM.
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