Component Tests and General Diagnostics

Part 1 Of 3:

Part 2 Of 3:

Part 3 Of 3:

1. INSPECT COMBINATION METER CIRCUIT
Disconnect the 5 connectors from the combination meter.

2. Key unlock warning system: INSPECT COMBINATION METER OPERATION




a. Connect the positive (+) lead from the battery to terminal 12 of connector "E".
b. Connect the negative (-) lead from the battery to terminals 9, 16 and 17 of the connector "D".
c. Check the chime sounds.




d. Disconnect the negative (-) lead from the battery to terminal 9 of connector "D".
e. Check that the chime stops sounding.




f. Connect the negative (-) lead from the battery to terminal 9 of the connector "D".
g. Connect the positive (+) lead from the battery to terminal 12 of the connector "C".
h. Check that the chime stops sounding.
If operation is not as specified, replace the combination. meter.

3. Driver's seat belt waring system: INSPECT COMBINATION METER OPERATION




a. Connect the positive (+) lead from the battery' to terminals 12 of connector "E" and 12 of connector "C", and negative (-) lead from the battery to terminal 17 and 3 of connector "D"
b. Check that the driver's seat belt warning light flushes and buzzer sounds for approx. 6 secs.




c. Disconnect the negative (-) lead from the battery to terminal 3 of the connector "D" and reconnect it again.
d. Check that the buzzer sounds again.
e. Check that the buzzer stops sounding when disconnecting terminal 3 of connector "D" from the negative (-) lead.

HINT: Check the buzzer sounds within a period of approx. 6 secs.

If operation is not as specified, replace the combination meter.

4. Passenger's seat belt warning system: INSPECT COMBINATION METER OPERATION




a. Connect the positive (+) lead from the battery to terminals 12 of the connector "E" and 12 of connector "C", and negative (-) lead from the battery to terminal 17 of the connector "D".
b. Connect the terminal 14 of connector "D" to battery negative (-) terminal through the 3.4 - W test bulb.
c. Connect the negative (-) lead from battery to terminal 4 of connector "D".
d. Check that the bulb flashes for approx. 6 secs.
e. Disconnect the negative (-) lead from the battery to terminal 4 of the connector "D" and reconnect it again.
f. Check that the bulb flash again.




g. Check that the buzzer stops sounding when disconnecting terminal 4 from the negative (-) lead.

HINT: Check the buzzer sounds within a period of approx. 6 secs.

If operation is not as specified, replace the combination meter.

5. Key illuminated entry system: INSPECT COMBINATION METER OPERATION




a. Connect the positive (+) lead from the battery to terminal 12 of the connector "E" and negative (-) lead from the battery to terminals 9 and 17 of the connector "D".
b. Connect the terminal 15 of the connector "D" to battery negative (-) terminal through the 3.4 - W test bulb.
c. Check that the bulb lights up.




d. Disconnect the negative (-) lead from the battery to the terminal 9.
e. After approx. 5 secs, check that the bulb turns OFF

6. Light auto turn OFF system: INSPECT COMBINATION METER OPERATION




a. Connect the positive (+) lead from the battery to the terminals 12 of connector "C" and 12 of connector "E", and negative (-) lead from the battery to the terminal 17 of connector "D".
b. Check that the voltage of the terminal 6 of the connector "D" is the battery positive voltage after negative (-) lead from the battery has been connected to terminal 2 of the connector "D".




c. Check that the voltage of the terminal 5 of the connector "D" is the battery positive voltage after negative (-) lead from the battery has been connected to terminal 1 of the connector "D".




d. Check that the voltage of the terminals 5 and 6 of the connector "D" is 0 V after terminal 12 of the connector "C" has been disconnected and terminal 9 of the connector "D" has been connected to the negative (-) lead from the battery.




e. Check that the voltage of the terminals 5 and 6 of the connector "D" is battery positive voltage after terminals 1 and 2 of the connector "D" has been disconnected and reconnected.




7. 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.




8. INSPECT VEHICLE SPEED SENSOR OPERATION
a. Connect the positive (+) lead from battery to terminal 1 and negative (-) lead to terminal 2.
b. Connect the positive (+) lead from tester to terminal 3 and the 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 4 times for every revolution of the speed sensor shaft.

If operation is not as specified, replace the sensor.




9. 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 with tachometer indications.
DC 13.5 V 20 °C at (68 °F)

10. INSPECT FUEL RECEIVER GAUGE OPERATION




a. Disconnect the connector from the sender gauge.
b. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.




c. Connect terminals 2 and 3 on the wire harness side connector through a 3.4 - W Watts test bulb.
d. Turn the ignition switch ON, check that the bulb lights up and the receiver gauge needle moves towards the full side.

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.







11. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
If resistance value is not as specified, replace the receiver gauge.







12 INSPECT FUEL SENDER GAUGE
Measure the resistance between terminals 1 and 3 for each float position.
If resistance value is not as specified, replace the sender gauge.




13. 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.







14. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.

HINT: Connect the test leads so that the current from the ohmmeter can flow according to the above order.This circuit includes the diode.

If resistance value is not as specified, replace the receiver gauge.







15 INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE
Connect the wire harness as shown in the illustration, and adjust the ammeter pointer to indicate "0" using the slide rheostat, then read the rheostat indication.
If resistance value is not as specified, replace the engine coolant temperature sender gauge.




16 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, test the bulb.




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

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

If operation is not as specified, replace the switch.




18. INSPECT BRAKE WARNING LIGHT
a. Disconnect the connectors from the level warning switch and parking brake switch.
b. Connect terminals on the wire harness side connector of the level warning switch connector.
c. Turn the ignition switch ON and check that the warning light lights up.
If the warning light does not light up, test the bulb.




19. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY
a. Check that no continuity exists between terminals with the switch OFF (float up).
b. Check that continuity exists between terminals with the switch ON (float down).
If operation is not as specified, replace the switch.




20. INSPECT PARKING BRAKE SWITCH CONTINUITY
a. Check that continuity exists between terminals with the switch ON (switch pin released).
b. Check that no continuity exists between terminals with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch.




21. INSPECT WASHER LEVEL WARNING LIGHT
a. Disconnect the connectors from the level warning switch and parking brake switch.
b. Connect terminals on the wire harness side connector of the level warning switch connector.
c. Remove the CHARGE fuse and turn the ignition switch ON, and check that the warning light comes on.
If the warning light does not light up, test the bulb.




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




23. INSPECT SEAT BELT WARNING LIGHT
a. Ground terminal 2 on the integration relay with the connectors still connected.
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.




24. INSPECT BUCKLE SWITCH CONTINUITY
a. Check that continuity exists between terminals on the switch side connector with the switch ON (belt unfastened).
b. Check that no continuity exists between terminals on the switch side connector with the switch OFF (belt fastened).
If operation is not as specified, replace the seat belt inner.




25. INSPECT 4WD INDICATOR LIGHT
a. Disconnect the connector from the 4WD indicator switch. Connect the switch terminal 2 and body ground.
b. Turn the ignition switch ON. Check that the bulb lights up. If operation is not as specified, remove and test the bulb.




26. INSPECT LIGHT CONTROL RHEOSTAT
a. Connect terminals 1 and 3 through a 3.4 - W test bulb.
b. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2.
c. Turn the rheostat knob to fully counterclockwise, check that the test bulb goes out.
d. Gradually turn the rheostat knob to clockwise, check that the test bulb brightness changes from dark to bright.
If operation is not as specified, replace the rheostat.




27. INSPECT OPEN DOOR WARNING LIGHT
a. Disconnect the connector from the door courtesy switch and ground terminal on the wire harness side connector.
b. Turn the ignition switch ON, check that the warning light lights up.
If the warning light does not light up, test the bulb.




28. INSPECT BULB CHECK RELAY OPERATION
a. Connect the positive (+) lead from the battery to terminal C through a 1.4 W test bulb and the negative (-) lead to terminal B, check that the test bulb does not light up.
b. Connect the positive (+) lead from the battery to terminal A and check that the test bulb lights up.
If operation is not as specified, replace the relay.




29. Passenger's 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.





30. INSPECT PASSENGER SEAT BELT WARNING LIGHT
Connect the positive (+) lead from the battery to the terminal 1 and negative (-) lead to terminal 4, and check that the warning light lights up.