Instrument Cluster Test 3A - Fuel Gauge 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, check for Powertrain Control Module (PCM) diagnostic trouble codes. If trouble code(s) exist, repair as required. See the appropriate TESTS W/CODES in the ENGINE PERFORMANCE section. For 4.0L 6-Cylinder, see: TESTS W/O CODES - 4.0L 6-CYL . For 5.2L V8, see: TESTS W/O CODES - 5.2L V8 . If no trouble code(s) exist, go to next step.
- Using scan tool, select MIC CLUSTER menu. Actuate fuel gauge. If fuel gauge moves to its calibration points, replace powertrain control module. See GAUGE CALIBRATION POINTS table under INSTRUMENT CLUSTER TEST 2A. If fuel gauge does not move to its calibration points, go to next step.
- Remove instrument cluster. Loosen 4 screws holding fuel gauge to circuit board. Ensure screws do not touch circuit board. Using an ohmmeter, measure resistance across fuel gauge coils No. 1 and 2. See Fig 1 . If resistance across each coil is about 280 ohms, replace circuit board. If resistance across each coil is not about 280 ohms, replace fuel gauge.