One Gauge Malfunctioning (Excluding Speedometer & Trip Odometer): Tachometer

If tachometer is malfunctioning, check for the following and repair as necessary:

• Faulty engine revolution sensor (tachometer malfunction) or faulty tachometer circuit. See TACHOMETER CIRCUIT TEST  under SYSTEM TESTS.
• Faulty combination meter Flexible Printed Circuit (FPC).
• Faulty combination meter.