Component Tests and General Diagnostics
INSPECTIONConnector View:
Pinouts (Part 1):
Pinouts (Part 2):
Pinouts (Part 3):
Pinouts (Part 4):
1. INSPECT COMBINATION METER CIRCUIT
Connect the connector "A" , "B", "C" and "D" to the combination meter and inspect the wire harness side connectors from the back side as shown in the table.
If circuit is not as specified, wiring diagram and inspect the circuits connected to other parts.
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.
If error is excessive, replace the speedometer.
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.
- 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)
5. INSPECT TACHOMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the meter.
6. INSPECT VOLTMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the meter.
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 SENDER GAUGE RESISTANCE
a. Apply voltage between terminals 2 and 3.
b. Measure voltage between terminals 1 and 2 for each float position.
If voltage value is not as specified, replace main sender gauge.
9. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE OPERATION
a. Disconnect the connector from the sender gauge.
b. Turn the ignition switch ON and check that the receiver gauge needle indicates COOL.
c. Ground terminal on the wire harness side connector through a 3.4-W test bulb.
d. Turn the ignition switch ON, and check that the bulb lights up and the receiver gauge needle moves to the hot side.
If operation is as specified, replace the sender gauge. Then recheck the system.
If operation is not as specified, measure the receiver gauge resistance.
10. INSPECT ENGINE COOLANT TEMPERATURE 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.
HINT: This circuit includes the diode.
If resistance value is not as specified, replace the receiver gauge.
11. INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and enter the value in the left formula. Check the resistance conforms to the values in the table below.
If resistance value is not as specified, replace the engine coolant temperature sender gauge.
12. INSPECT OIL PRESSURE RECEIVER GAUGE OPERATION
a. Disconnect the connector from the sender gauge.
b. Turn the ignition switch ON and check that the receiver gauge needle indicates LOW.
c. Ground terminal on the wire harness side through a 3.4 W test bulb.
d. Turn the ignition switch ON and check that the bulb lights up and that the receiver gauge needle moves to the high side.
If operation is not as specified, measure the receiver gauge resistance.
13. INSPECT OIL PRESSURE GAUGE RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as the specified, replace the meter.
14. INSPECT OIL PRESSURE SENDER GAUGE OPERATION
a. Disconnect the connector from the sender gauge.
b. Apply battery positive voltage to the sender gauge terminal through a test LED.
c. Check that the bulb does not light when the engine is stopped.
d. Check that the LED flashes when the engine is running. The number of flashed should vary with engine speed.
If operation is not as specified, replace the sender gauge.
15. INSPECT ABS WARNING BUZZER OPERATION
a. Disconnect the connector from the meter connectors.
b. Apply battery positive voltage to the terminal A16 and A18.
If operation is not as specified, replace the meter.
16. 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 level warning switch connector.
d. Start the engine, check that the warning light lights up. If the warning light does not light up, test the bulb or wire harness.
17. 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 tank.
If operation is not as specified, replace the switch.
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 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 bulb or wire harness.
20. INSPECT DOOR COURTESY SWITCH CONTINUITY AND CIRCUIT
21. INSPECT SEAT BELT WARNING LIGHT
a. Disconnect the connector from the retractor 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, inspect the bulb or wire harness.
22. INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between the terminals 1 and 2 on the switch side connector with the switch ON (belt fastened).
b. Check that continuity exists between the terminals 2 and 4 on the switch side connector with the switch OFF (belt unfastened).
If operation is not as specified, replace the switch.
23. INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on wire harness side, as shown.
If continuity is not as specified, inspect the circuits connected to other parts.
24. 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.
25. INSPECT LIGHT CONTROL RHEOSTAT
a. Connect the positive (+) lead from the battery to terminal 1 and negative lead (-) to terminal 3.
b. Connect the positive (+) lead from the voltmeter to terminal 2 and negative lead to terminal 3.
c. Turn the rheostat knob and check that the voltage changes.
26. 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.
27. 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.
28. INSPECT INCLINATION SENSOR
a. With the combination meter in which the inclination sensor installed, connect the battery plus to the Al 6 terminal (IGN+) of the meter connector, and battery minus to the B16 terminal (E/G EARTH).
b. Check whether or not the voltage is 5 V between the VDC and the GND terminals of the inclination sensor connector.
c. Check the voltage between the OUT and the GND terminals when the inclination sensor is in level position and when it is inclined backward and forward.
Standard Value:
Sensor in level position about 4.5 V
Sensor inclined about 0.5 V