
Speedometer
ON-VEHICLE INSPECTION OF SPEEDOMETER
(a) Using a speedometer tester, inspect the speedometer allowable indication error and check the operation of the odometer.
HINT: Tire wear and tire over or under inflation will increase the indication error.
Standard indication (mph) | Allowable range (mph)
20 | 20 — 23
40 | 40 — 43.5
60 | 60 — 64
80 | 80 — 84.5
100 | 100 — 105
Standard indication (km/h) | Allowable range (km/h)
20 | 18 — 23
40 | 40 — 44
60 | 60 — 64.5
80 | 80 — 85
100 | 100 — 105
120 | 120 — 125.5
140 | 140 — 146
160 | 160 — 167
If error is excessive, replace the speedometer.
(b) Check the speedometer for pointer vibration and abnormal noises.
HINT: Pointer vibration can be caused by a loose speedometer cable.
Tachometer
ON-VEHICLE INSPECTION OF TACHOMETER
(a) Connect a tune-up test tachometer, and start the engine.
NOTICE:
• Reversing the connection of the tachometer will damage the transistors and diodes inside.
• When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.
(b) Compare the tester and tachometer indications.
DC 13.5V, 25°C
Standard indication (rpm) | Allowable range (rpm)
700 | 610 — 750
3,000 | 2,800 — 3,200
5,000 | 4,800 — 5,200
7,000 | 6,700 — 7,300
If error is excessive, replace the tachometer.