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Identifying Inoperative Gauge

NOTE: Perform INSTRUMENT CLUSTER TEST 1A  before proceeding with this test. For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER - INTRODUCTION. Perform VERIFICATION TEST: VER-2A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Turn ignition off. While holding TRIP reset button on instrument cluster, turn ignition to ON position. This will start Mechanical Instrument Cluster (MIC) self-test. This test actuates gauges through their full range. If each gauge passed the self-test, go to next step. If one or more gauges did not pass self-test, go to INSTRUMENT CLUSTER TEST 10A .
  2. Cycle ignition switch to stop self-test. Go to appropriate test for malfunctioning gauge. See GAUGE TEST DIRECTORY  table. If tachometer is only gauge malfunctioning, go to next step.
  3. Start engine. Using scan tool, read engine RPM. If scan tool displays engine speed above 400 RPM, replace instrument cluster. If scan tool does not display engine speed above 400 RPM, go to TEST 8A in appropriate VEHICLE COMMUNICATIONS article.
GAUGE TEST DIRECTORY

Gauge Go To
Temperature INSTRUMENT CLUSTER TEST 11A 
Fuel INSTRUMENT CLUSTER TEST 12A 
Speedometer INSTRUMENT CLUSTER TEST 13A 
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