Component Tests and General Diagnostics
INSPECTIONCombination Meter - Connector View:
Combination Meter - Pinouts Part 1:
Combination Meter - Pinouts Part 2:
Combination Meter - Pinouts Part 3:
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, 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 widen the indication error range.
If the error exceeds the allowable range, replace the speedometer.
3. INSPECT SPEEDOMETER VOLTAGE
While driving the vehicle at the speed of 10 km/h, check the voltage between the terminal 6 and 11 of the combination meter assy.
STANDARD: Fluctuation between 10 V to 14 V or less is repeated 7 times within 1 sec.
4. INSPECT VEHICLE SPEED SENSOR OPERATION
a. Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2.
b. Connect the tester positive (+) lead to terminal 3 and the tester negative (-) lead to terminal 2.
c. Rotate the shaft.
d. Check that there is voltage change from approx. 0 V to 11 V or more between terminals 2 and 3.
HINT: The voltage change should be performed 4 times for every revolution. If it doesn't, replace the sensor.
5. 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 the diodes Inside.
- When removing or installing the tachometer, be careful not to drop it or give it heavy shocks.
b. Compare the tester and the tachometer indications.
DC 13.5 V 25 °C at (77 °F):
6. INSPECT FUEL SENDER GAUGE VOLTAGE
a. Apply voltage between terminal 2 and 3.
b. Measure voltage between terminal 1 and 2 for each floating position.
If voltage value is not as specified, replace the sender gauge.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
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).
If operation is not as specified, replace the switch or inspect ground point.
14. INSPECT OPEN DOOR WARNING LIGHT
a. Disconnect the connector from the driver door courtesy switch, and ground terminal on the wire harness side connector.
b. Turn the ignition switch ON and check that the warning light lights up.
15. INSPECT SEAT BELT WARNING BUZZER
a. Disconnect the connector from the combination meter.
b. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead terminal 11.
c. Check that the buzzer stop after 4 to 8 seconds.
d. Check that buzzer stops when connecting the terminal 20 to the GND.
16. INSPECT KEY UNLOCK WARNING BUZZER
a. Disconnect the connector from the combination meter.
b. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 11.
c. Connect the battery negative (-) lead to terminal 19 and 20, and check that the buzzer sound.
17. INSPECT SEAT BELT WARNING LIGHT
a. Disconnect the connector from the seat belt buckle switch and ground terminal on the wire harness side connector.
b. Turn the ignition switch ON and check that the warning light comes on.
18. INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY
If operation is not as specified replace the switch.
19. INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on the wire harness side, as shown.
If continuity is not as specified, inspect the circuits connected to other parts.
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 LIGHT CONTROL RHEOSTAT
a. Turn the rheostat knob to OFF, and check that there is no continuity between terminal 5 and 4 (Rheostat knob turned fully counterclockwise).
b. Gradually, turn the rheostat knob from the dark side to the bright side, and check that there is continuity between terminal 5 and 4 (Rheostat knob turned clockwise).
If operation is not as specified, replace the rheostat.
22. INSPECT INCLINATION SENSOR
a. With the combination meter in which the inclination sensor installed, connect the battery positive (+) lead to terminal 1 (IGN+) of the meter connector, and the battery negative (-) lead to terminal 11 (E/G EARTH).
b. Check if the voltage is 5V between terminal Vcc and GND of the inclination sensor connector.
c. Check the voltage between terminal OUT and GND when the inclination sensor is in level position and when it is inclined backward and forward.
Standard Value:
Sensor in level position about 4.5V
Sensor inclined about O.5V
23. INSPECT WINDOW WASHER LEVEL WARNING LIGHT
a. Disconnect the connector from the warning switch and ground terminal on the wire harness side connector.
b. Run the engine and check that the warning light comes on.
If the warning light does not come on, inspect the bulb or the wire harness.
24. 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 grounding point.