Test No. 6: Fuel Gauge Inoperative Or Incorrect
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure ignition switch is in LOCK position. Disconnect negative battery cable. After more than 30 seconds, reconnect negative battery cable. Cycle ignition switch to ON position, then LOCK position, 3 times. Turn ignition switch to ON position. Push trip reset button 3 times. Push trip reset button until DTC 23 is reached. If fuel gauge cycles from "F" to 1/2 to "E" repeatedly, go to next step. If fuel gauge does not cycle from "F" to 1/2 to "E" repeatedly, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
- Push trip reset button until DTC 22 is reached. If LCD does not indicate 000 or 255, go to step 6 . If LCD indicates 000 or 255, go to next step.
- Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Disconnect fuel pump connector. See Fig 1 . Check for continuity between ground and instrument cluster harness connector No. 2, terminal 2E. If continuity exists, repair short to ground in wiring between instrument cluster and fuel gauge sending unit. See WIRING DIAGRAMS . If continuity does not exist, go to next step.
- Check for continuity between ground and fuel pump harness connector terminal "C". See Fig 1 . If continuity exists, go to next step. If continuity does not exist, repair wiring between instrument cluster and fuel gauge sending unit. See WIRING DIAGRAMS .
- Disconnect instrument cluster connector. Check for continuity between instrument cluster connector No. 2, terminal 2E and instrument cluster connector No. 4, terminal 4F. See Figure . If continuity exists, go to next step. If continuity does not exist, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
- Remove fuel tank and fuel pump sending unit. Test fuel pump sending unit. See FUEL GAUGE SENDING UNIT TEST under COMPONENT TESTS. If fuel pump sending unit is okay, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. If fuel pump sending unit is defective, replace fuel pump sending unit.