Component Tests and General Diagnostics
COMBINATION METERINSPECTION
1. Connector disconnected:
INSPECT COMBINATION METER CIRCUIT
Disconnect connector from the combination meter and inspect the connectors on the wire harness side as follows.
2. INSPECT SPEEDOMETER / ON-VEHICLE
Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer.
HINT: Tire wear and tire over or under inflation will increase the indication error.
3. INSPECT SPEEDOMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as the specified, replace the meter.
4. INSPECT TACHOMETER ON-VEHICLE
a. Connect a tune-up test tachometer, and start the engine.
NOTE: Reversing the connection of the tachometer will damage the transistors and diodes inside.
b. Compare the tester and tachometer indications.
If error is excessive, replace the tachometer.
RPM (DC 13.5 V,25 °C (77 °F))
5. INSPECT TACHOMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as the specified, replace the meter.
6. INSPECT FUEL RECEIVER GAUGE OPERATION
a. Disconnect the connector from the main sender gauge.
b. Disconnect the battery terminal once then after 30 seconds, reconnect the terminal.
c. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.
d. Connect the main sender gauge.
e. Disconnect the connector from the sub sender gauge.
f. Disconnect the battery terminal once then after 30 seconds, reconnect the terminal.
g. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY
HINT: Because of the silicon oil in the gauge, it will take a short time for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resistance.
7. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the receiver gauge.
8. INSPECT FUEL MAIN SENDER GAUGE VOLTAGE
a. Apply voltage between terminals 2 and 3.
b. Measure the voltage between terminals 1 and 3 for each float position.
If resistance value is not as specified, replace the main sender gauge.
9. INSPECT FUEL SUB SENDER GAUGE VOLTAGE
a. Apply voltage between terminals 1 and 3.
b. Measure the voltage between terminals 1 and 2 for each float position.
If resistance value is not as specified, replace the sub sender gauge.
10. INSPECT WATER TEMPERATURE RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
HINT: Connect the test leads so the current from the ohmmeter can flow according to the chart order.
If resistance value is not as specified, replace the water temperature receiver gauge.
11. INSPECT BRAKE WARNING LIGHT
a. Disconnect the connector from the brake fluid warning switch.
b. Release the parking brake pedal.
c. Connect terminals on the wire harness side of the level warning switch connector.
d. Start the engine and check that the warning light lights up. If the warning light does not light up, test the LED.
12. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
a. Disconnect the connector.
b. Check that no continuity exists between terminals with the switch OFF (float up).
c. Use syphon, etc. to take fluid out of the reservoir tank.
d. Check that continuity exists between terminals with the switch ON (float down).
e. Pour the fluid back in reservoir tank.
If operation is not as specified, replace the reservoir tank.
13. INSPECT PARKING BRAKE SWITCH CONTINUITY
a. Check that continuity exists between the terminal and switch body with the switch ON (switch pin released).
b. Check that no continuity exists between the terminal and switch body with the switch OFF (switch pin pushed in).
14. INSPECT OPEN DOOR WARNING LIGHT
Disconnect the connector from the door courtesy switch and ground terminal 1 on the wire harness side, and check that the warning light lights up.
If the warning light does not light up, inspect the LED or wire harness.
15. INSPECT SEAT BELT WARNING LIGHT
a. Disconnect the connector from the buckle switch terminal 1 and 2 on the wire harness side connector.
b. Turn the ignition switch ON and check that the warning light lights up.
If the warning light does not light up, inspect the LED or wire harness.
16. INSPECT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between terminal 2 and 4 on the switch side connector with the switch ON (belt fastened).
b. Check that no continuity exists between terminal 2 and 4 on the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the seat belt inner.
17. INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on wire harness side, as shown.
18. INSPECT TWIN TRIP AND ODO SWITCH CONTINUITY
If continuity is not as specified, replace the twin trip and odo switch.
19. INSPECT SEAT BELT WARNING BUZZER
Check that the buzzer sound when turning the ignition switch ON with the seat belt unfastened.
20. Passenger seat only:
INSPECT SEAT BELT WARNING OCCUPANT DETECTION SENSOR CONTINUITY
Check that continuity exists between the terminals 1 and 2 when pressing the sensing part.
If operation is not as specified, replace the sensor.
21. INSPECT RHEOSTAT LIGHT CONTROL VOLUME RESISTANCE
If resistance is not as specified, replace switch.
22. INSPECT TAIL CANCEL SWITCH CONTINUITY
Inspect continuity between terminal 3 and 4.
If resistance is not as specified, replace the switch.