Fuel Gauge: M30

To check power source, turn ignition on. Check voltage between terminal No. 9 and ground. See Fig 1 . If battery voltage is present, go to step 3).

Fig 1: Rear View of Combination Meter (M30)
Courtesy of NISSAN MOTOR CO., U.S.A.
If battery voltage is not present, check for blown fuse or fusible link. Check continuity between battery terminal and combination meter. Check battery circuit from ignition switch and relay. See appropriate wiring diagram in the WIRING DIAGRAMS Section.
Turn ignition switch on. Check voltage between fuel gauge terminal "B" and ground. If approximately 8 volts are present, go to step 5).
If approximately 8 volts are not present, check combination meter printed circuit. If printed circuit is okay, check combination meter voltage regulator.
Turn ignition on. Connect a jumper wire with a 3.4 watt light bulb between fuel gauge terminal "A" and ground for less than 10 seconds.
If fuel gauge needle does not move smoothly from EMPTY to FULL, replace fuel gauge. If needle moves smoothly from EMPTY to FULL, check wire continuity between terminal No. 15 and ground.
If continuity is not present, repair or replace wire harness between combination meter and fuel gauge unit. If continuity exists, test fuel tank sending unit. See FUEL TANK SENDING UNIT under TESTING.