System Inspection

COMBINATION METER

INSPECTION







1. Connector disconnected:
INSPECT COMBINATION METER CIRCUIT
Disconnect connector "A" and "B" from the combination meter and inspect the connectors on the wire harness side as shown in the table.
If circuit is not as specified, wiring diagram and inspect the circuits connected to other parts.







2. INSPECT INSTRUMENT PANEL INTEGRATION ECU CIRCUIT
a. Remove the combination meter cover.
b. Inspect the connectors on the ECU as follows.
If circuit is not as specified, replace the circuit plate.




3. INSPECT COMBINATION METER ECU CIRCUIT
a. Remove the combination meter cover.
b. Inspect the connectors on the instrument panel integration ECU as follows.
If circuit is not as specified, replace bulb or combination meter ECU.




4. 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.

If error is excessive, replace the speedometer.







5. INSPECT SPEEDOMETER RESISTANCE
a. Remove the meter cover, A/C and combination meter integrated ECU and combination meter circuit plate.
b. Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as the specified, replace the meter.

6. INSPECT TACHOMETER ON-VEHICLE
a. Connect a turn-up test tachometer, and start the engine.

NOTE:
- 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 13.5 V 25 °C at (77 °F)







7. INSPECT TACHOMETER RESISTANCE
a. Remove the meter cover1 A/C and combination meter integrated ECU and combination meter circuit plate.
b. Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the meter.




8. INSPECT FUEL RECEIVER GAUGE OPERATION
a. Disconnect the connector from the main sender gauge.
b. Disconnect the battery terminal once then after 30 secs., 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 secs., 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.







9. INSPECT FUEL RECEIVER GAUGE RESISTANCE
a. Remove the meter cover, A/C and combination meter integrated ECU and combination meter circuit plate.
b. Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the receiver gauge.







10. INSPECT FUEL MAIN SENDER GAUGE RESISTANCE
Measure the resistance between terminals 1 and 2 for each float position.
If resistance value is not as specified, replace the main sender gauge.







11. INSPECT FUEL SUB SENDER GAUGE RESISTANCE
Measure the resistance between terminals 1 and 2 for each float position.
If resistance value is not as specified, replace the sub sender gauge.







12. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE RESISTANCE
a. Remove the meter cover, A/C and combination meter integrated ECU and combination meter circuit plate.
b. Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the receiver gauge.

HINT: This circuit includes the diode.

If resistance value is not as specified, replace the receiver gauge.
If resistance value is not as specified, replace the engine coolant temperature sender gauge.




13. INSPECT LOW OIL PRESSURE WARNING LIGHT
a. Disconnect the connector from the warning switch and ground terminal 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, check the bulb circuit.




14. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY
a. Disconnect the connector from the switch.
b. Check that continuity exists between terminal and ground with the engine stopped.
c. Check that no continuity exists between terminal and ground with the engine running.

HINT: Oil pressure should be over 24.5 kPa (0.25 kgf/sq.cm, 3.55 psi).

If operation is not as specified, replace the switch.




15. INSPECT BRAKE WARNING LIGHT
a. Disconnect the connector from the brake fluid warning switch.
b. Release the parking brake pedal.
c. Connect the terminals on the wire harness side of the 1ev el warning switch connector.
d. Start the engine, check that the warning light lights up. If the warning light does not light up, check the bulb circuit.




16. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY
a. Remove the reservoir tank cap and strainer.
b. Disconnect the connector.
c. Check that no continuity exists between the terminals with the switch OFF (float up).
d. Use siphon, etc. to take fluid out of the reservoir tank.
e. Check that continuity exists between the terminals with the switch ON (float down)
f. Pour the fluid back in the reservoir.
If operation is not as specified, replace the switch.

17. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT




18. 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).
If operation is not as specified, replace the switch or inspect ground point.

19. INSPECT PARKING BRAKE SWITCH CIRCUIT




20. INSPECT REAR LIGHTS WARNING LIGHT
a. Disconnect the connector from the light failure sensor and ground terminal 3 on the wire harness side connector.
b. Start the engine, check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire harness.







21. INSPECT LIGHT FAILURE RELAY CIRCUIT
Disconnect the connector from the relay and inspect the connector on the wire harness side, as shown.
If the circuit is as specified, replace the relay.
If the circuit is not as specified, inspect the circuits connected to other parts.




22. 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, check the bulb circuit.

23. INSPECT DOOR COURTESY SWITCH CONTINUITY AND CIRCUIT




24. INSPECT LIGHT CONTROL RHEOSTAT OPERATION
Gradually, turn the rheostat knob from the bright side to dark side and check that the resistance decreases from 10 Ohms to 0 Ohms between terminal 4 and 5. (Rheostat knob turned to clock-wise)
If operation is not as specified, replace the rheostat light control.




25. INSPECT WINDOW WASHER LEVEL WARNING LIGHT
a. Disconnect the connector from the warning switch and ground terminal on the wire harness side connector.
b. Engine running and check that the warning light lights up. If the warning light does not light up, inspect the bulb or wire harness.




26. INSPECT WINDOW WASHER LEVEL WARNING SWITCH CONTINUITY
a. Check that no continuity exists between the terminals with the switch OFF (float up).
b. Check that continuity exists between the terminals with the switch ON (float down).
If operation is not as specified, replace the switch or inspect ground point.




27. INSPECT SEAT BELT WARNING LIGHT
a. Disconnect the connector from the buckle switch and ground terminal on the wire harness side connector as shown in the illustration.
b. Turn the ignition switch ON and check that the warning light lights up.
If the warning light does not light up, check the bulb circuit.




28. Driver's Side:
INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between the terminals 2 and 3 on the switch side connector with the switch ON (belt fastened).
b. Check that continuity exists between the terminals 1 and 3 on the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the switch.




29. Passenger's Side:
INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between the terminals 1 and 3 on the switch side connector with the switch ON (belt fastened).
b. Check that continuity exists between the terminals 2 and 3 on the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the switch.

30. Driver side:
INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT




31. 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.