Instrument Cluster Test 5A - Tachometer Not Operating Properly
NOTE:
Perform INSTRUMENT CLUSTER TEST 1A
before proceeding. For connector terminal ID, see CONNECTOR IDENTIFICATION
and WIRING DIAGRAM. Perform TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
- Using scan tool, select MIC CLUSTER. Actuate tachometer. If tachometer moves to it's calibration points, replace powertrain control module. See GAUGE CALIBRATION POINTS table under INSTRUMENT CLUSTER TEST 2A. If tachometer does not move to it's calibration points, go to next step.
- Remove instrument cluster. Loosen screws holding tachometer to circuit board. Ensure screws do not touch circuit board. Using an ohmmeter, measure resistance across fuel gauge coils No. 1 and 2. See Figure . If resistance across each coil is about 280 ohms, replace circuit board. If resistance across each coil is not about 280 ohms, replace tachometer.