Miata, MPV, MX-6, Protege, 323, 626 & 929
- Ensure fuse and wiring are okay. To test fuel gauge, disconnect fuel gauge sending unit connector at fuel tank.
- Connect Red wire lead of Checker (49-0839-285) to "Y" terminal (harness side) of sending unit connector. See Fig 1
. Connect checker Black wire lead to body ground.
- Set checker to various resistance values shown in FUEL GAUGE RESISTANCE
. Turn ignition switch to ON position and ensure needle position corresponds to resistance measurement. See Figure
.
- Allow 2 minutes for needle to stabilize. Allowable limit of needle deflection is twice width of needle.
- If gauge needle readings are as specified in FUEL GAUGE RESISTANCE table, replace sending unit. If gauge readings are not as specified, check wiring. If wiring is okay, replace gauge.
Courtesy of MAZDA MOTORS CORP.