Component Tests and General Diagnostics

ON-VEHICLE INSPECTION







1. INSPECT SPEEDOMETER
a. Check the operation.
1. Using a speedometer tester, inspect the speedometer for acceptable indication error and check the operation of the odometer.
Reference: km/h (Canada)

NOTE: Tire wear and over or under tire pressure will affect the indication error.

2. Check the deflection width of the speed meter indicator.
Reference: Below 0.5 km/h (0.3 mph)




2. INSPECT OUTPUT SIGNAL OF VEHICLE SPEED
a. Check for the signal.
1. While driving the vehicle at 10 km/h, check the voltage between the terminal C9-1and C9-18 of the combination meter assy.
Standard: Fluctuation between 7.7 to 14 V or less is repeated 7 times within 1 sec.

NOTE: Check it with the ignition switch turned to the ON position and the connector connected.

3. INSPECT TACHOMETER
a. Check operation
1. Connect the tune-up test tachometer, and start the engine.

NOTE:
- Reversing the connection of the tachometer will damage the transistors and the insides of the diodes.
- When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.




2. Compare the result of the test with the standard indication.
DC 13.5 V, 25 °C (77 °F)