Note: This procedure applies to analog indicators only (and NOT digital).
1. The inspection procedure described in this paragraph applies to the coolant temperature gauge, fuel tank level gauge and oil pressure gauge. The voltmeter installed on the dashboard cannot be tested in the following way.
2. If the indicator arrow does not move from the zero position, first check the fuse. If the fuse is OK, find the sensor of the corresponding indicator and check its serviceability (the location of the fuel level sensor is described in chapter 4, the location of the coolant temperature sensor is described in chapter 3, and the location of the oil pressure sensor is described in chapter 2B). Disconnect the electrical connector from the sensor and connect the connector terminal to the vehicle ground using a wire. If the connector has multiple terminals, find the correct terminal according to the wiring diagram (see the end of Chapter 12).
3. Turn on the ignition briefly. If the indicator arrow moves to the maximum mark. this indicates that the indicator and wiring are working properly and indicates a possible sensor malfunction.
Note: After completing the test, turn off the ignition immediately, as this test may cause the indicator to malfunction.
4. If the indicator arrow remains motionless, this indicates a possible malfunction of the indicator or electrical wiring. Remove the instrument panel and check for contact between the sensor and indicator terminals. Also, make sure that power is supplied to the instrument cluster and that the instrument cluster ground wire is firmly connected to ground. If necessary, refer to the relevant wiring diagram (see the end of this chapter). If the wiring and sensor are in good condition, then the indicator may be faulty.
(Based on website data mazbook)