Normal Check

1. Remove the power supply tightening screw.
2. Use an ohmmeter to measure the resistance value between the terminals.

CAUTION: When Inserting the testing probe into the power supply terminal, be careful not to touch the printed board.

Standard value:
Power supply - Ground 178.9 + 18 ohms
Power supply - Engine coolant temperature gauge 54 ± 2.7 ohms
Engine coolant temperature gauge - Ground 232.9 ± 23 ohms

3. If within the standard value, the engine coolant temperature gauge is OK. if not within the standard value, replace the engine coolant temperature gauge.