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Combination Meter: Inspection

  1. 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 Fig 1 .

    Fig 1: Inspecting Combination Meter Circuit (1 Of 2)
    G02879400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Inspecting Combination Meter Circuit (2 Of 2)
    G02879401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If circuit is not as specified, wiring diagram and inspect the circuits connected to other parts.

  2. INSPECT MULTI INFORMATION DISPLAY CIRCUIT 

    Disconnect connector "C", "D", "E", "F", "G" "H" and "I" from the multi information display and inspect the connectors on the wire harness side as shown in Fig 3 .

    Fig 3: Inspecting Multi Information Display Circuit (1 Of 2)
    G02879402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Inspecting Multi Information Display Circuit (2 Of 2)
    G02879403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If circuit is not as specified, wiring diagram and inspect the circuits connected to other parts.

  3. INSPECT BETWEEN COMBINATION METER AND MULTI INFORMATION DISPLAY CIRCUIT 

    Disconnect connector "B" and "D" from the multi information display and combination meter inspect the connectors on the wire harness side as shown in TESTER CONNECTION AND CONTINUITY SPECIFICATION  .

    Fig 5: Identifying Connector
    G02879404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION AND CONTINUITY SPECIFICATION

    Tester connection Specified condition
    B2 - D2 Continuity
    B3 - D3 Continuity
    B4 - D4 Continuity
    B5 - D5 Continuity
    B6 - D6 Continuity
    B8 - D8 Continuity
    B9 - D9 Continuity
    B10 - D10 Continuity
    B11 - D11 Continuity
    B12 - D12 Continuity
    B13 - D13 Continuity
    B14 - D14 Continuity

    If circuit is not as specified, wiring diagram and inspect the circuits connected to other parts.

  4. INSPECT SPEEDOMETER ON-VEHICLE 

    Using a speedometer tester, check if the speedometer reading is within the allowable range, and check operation of the odometer.

    HINT:

    Tire wear and tire over inflation/ under inflation will skew speedometer tester reading.

    Fig 6: Inspecting Speedometer On-Vehicle
    G02879405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If error is excessive, replace the speedometer.

  5. INSPECT VEHICLE SPEED SENSOR OPERATION 
    1. Connect the positive (+) lead from battery to terminal 1 and negative (-) lead to terminal 2.
    2. Connect the positive (+) lead from tester to terminal 3 and the negative (-) lead to terminal 2.
    3. Rotate the shaft.
    4. Check that there is voltage change from approx. 0 V to 11 V or more between terminals 2 and 3.
    Fig 7: Inspecting Vehicle Speed Sensor Operation
    G02879406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.

  6. INSPECT SPEEDOMETER RESISTANCE 

    Measure the resistance between terminals with fixing pointer to the stopper.

    TESTER CONNECTION AND RESISTANCE

    Tester connection Resistance (Ω)
    A - B 250
    C - D 250

    If resistance value is not as the specified, replace the meter.

    Fig 8: Locating Tester Connection
    G02879407Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT TACHOMETER/ON-VEHICLE 
    1. 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.
    2. Compare the tester and tachometer indications.

    DC 13.5 V 25°C at (77°F) 

    INDICATION AND RANGE CHART

    Standard indication Allowable range
    700 630 - 770
    1,000 900 - 1,100
    2,000 1,850 - 2,150
    3,000 2,800 - 3,200
    4,000 3,800 - 4,200
    5,000 4,800 - 5,200
    6,000 5,750 - 6,250
    7,000 6,700 - 7,300
  8. INSPECT TACHOMETER RESISTANCE 

    Measure the resistance between terminals with fixing pointer to the stopper.

    TESTER CONNECTION AND RESISTANCE

    Tester connection Resistance (Ω)
    A - B 250
    C - D 250

    If resistance value is not as specified, replace the meter.

    Fig 9: Locating Tester Connection
    G02879408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT FUEL RECEIVER GAUGE OPERATION 
    1. Disconnect the connector from the main sender gauge.
    2. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.
      Fig 10: Inspecting Fuel Receiver Gauge Operation
      G02879409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect terminals 2 and 3 on the wire harness side connector through a 3.4 W test bulb.
    4. Turn the ignition switch ON, check that the bulb lights up and receiver gauge needle moves toward 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.

    Fig 11: Identifying Connector Terminal
    G02879410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. INSPECT FUEL RECEIVER GAUGE RESISTANCE 

    Measure the resistance between terminals with fixing pointer to the stopper.

    TESTER CONNECTION AND RESISTANCE

    Tester connection Resistance (Ω)
    A - B 250
    C - D 250

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

    Fig 12: Locating Tester Connection
    G02879411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. INSPECT FUEL SENDER GAUGE RESISTANCE 

    Measure the resistance between terminals 3 and 2 for each float position.

    RESISTANCE CHART

    Float position mm (in.) Resistance (Ω)
    F: Approx. 91.1 (1.36) +/- 3 (0.12) Approx. 2.0 +/- 1.0
    1/2: Approx. 34.2 (2.06) +/- 3 (0.12) Approx. 26.1 +/- 3.0
    E: Approx. 30.8 (5.31) +/- 3 (0.12) Approx. 48.7 +/- 1.0

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

    Fig 13: Identifying Connector Terminal
    G02879412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT FUEL LEVEL WARNING LIGHT 
    1. Disconnect the connector from the sender gauge.
    2. Connect terminals 1 and 3 on the wire harness side connector.
    3. Turn the ignition switch ON, check that the warning light lights up.

    If the warning light does not light up, test the bulb or inspect wire harness.

    Fig 14: Inspecting Fuel Level Warning Light
    G02879413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE OPERATION 
    1. Disconnect the connector from the sender gauge.
    2. Turn the ignition switch ON, check that the receiver gauge needle indicates COOL.
      Fig 15: Inspecting Engine Coolant Temperature Receiver Gauge Operation
      G02879414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Ground terminal on the wire harness side connector through a 3.4 W test bulb.
    4. Turn the ignition switch ON, check that the bulb lights up and the receiver gauge needle moves toward the hot side.
    Fig 16: Identifying Connector Terminal
    G02879415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 with fixing pointer to the stopper.

    TESTER CONNECTION AND RESISTANCE CHART

    Tester connection Resistance (Ω)
    A - B 250
    C - D 250

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

    Fig 17: Locating Tester Connection
    G02879416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE 

    Connect the wire harness as shown in Fig 18 , and adjust the ammeter pointer to indicate "0" using the slide rheostat, then read the rheostat indication.

    TEMPERATURE AND RESISTANCE CHART

    Temperature °C (°F) Resistance (Ω)
    50(122.0) 160 - 240
    120(248.0) 17.1 - 21.2

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

    Fig 18: Inspecting Engine Coolant Temperature Sender Gauge Resistance
    G02879417Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. INSPECT LOW OIL PRESSURE WARNING LIGHT 
    1. Disconnect the connector from the warning switch and ground terminal on the wire harness side connector.
    2. Turn the ignition switch ON, check that the warning light lights up.

    If the warning light does not light up, test the bulb or inspect wire harness.

    Fig 19: Inspecting Low Oil Pressure Warning Light
    G02879418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. INSPECT LOW OIL PRESSURE WARNING SWITCH OPERATION 
    1. Check that continuity exists between the terminal and ground with the engine stopped.
    2. Check that no continuity exists between the terminal and ground with the engine running.
    Fig 20: Inspecting Low Oil Pressure Warning Switch Operation
    G02879419Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Oil pressure should be over 29 kPa (0.35 kgf/cm2 , 4.3 psi)

    If operation is not as specified, replace the switch.

  18. INSPECT BRAKE WARNING LIGHT 
    1. Disconnect the connector from the brake fluid warning switch.
    2. Release the parking brake pedal.
    3. Connect the terminals on the wire harness side of the level warning switch connector.
    4. Start the engine, check that the warning light lights up.

    If the warning light does not light up, test the bulb or wire harness.

    Fig 21: Inspecting Brake Warning Light
    G02879420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. INSPECT BRAKE FLUID LEVEL WARNING SWITCH OPERATION 
    1. Remove the reservoir tank cap and strainer.
    2. Disconnect the connector.
    3. Check that no continuity exists between the terminals with the switch OFF (float up).
      Fig 22: Inspecting Brake Fluid Level Warning Switch Operation
      G02879421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Use a siphon, etc. to take fluid out of the reservoir tank.
    5. Check that continuity exists between the terminals with the switch ON (float down).
    6. Pour the fluid back in the reservoir tank.

    If operation is not as specified, replace the switch.

  20. INSPECT PARKING BRAKE WARNING SWITCH CONTINUITY 
    1. Check that continuity exists between terminal and switch body with the switch ON (switch pin released).
    2. Check that no continuity exists between 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.

    Fig 23: Inspecting Parking Brake Warning Switch Continuity
    G02879422Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. INSPECT REAR LIGHTS WARNING LIGHT 
    1. Disconnect the connector from the light failure sensor and ground terminal 4 on the wire harness side connector.
    2. Start the engine, check that the warning light lights up.

    If the warning light does not light up, test the bulb or inspect wire harness.

    Fig 24: Inspecting Rear Lights Warning Light
    G02879423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. INSPECT LIGHT FAILURE SENSOR CIRCUIT 

    Disconnect the connector from the sensor and inspect the connector on the wire harness side, as shown in Fig 25.

    Fig 25: Identifying Connector
    G02879424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION AND CONDITION

    Tester connection Condition Specified condition
    1 - Ground Constant Continuity(1)
    2 - Ground Constant Continuity(1)
    9 - Ground Constant Continuity(1)
    10 - Ground Constant Continuity(1)
    11 - Ground Constant Continuity
    12 - Ground Constant Continuity(1)
    3 - Ground Light control switch OFF No voltage
    3 - Ground Light control switch TAIL or HEAD Battery positive voltage
    4, 8 - Ground Ignition switch LOCK or ACC No voltage
    4, 8 - Ground Ignition switch ON Battery positive voltage
    7 - Ground Stop light switch OFF No voltage
    7 - Ground Stop light switch ON Battery positive voltage
    (1) * :There is resistance because this circuit is grounded through the bulb.

    If the circuit is as specified, replace the sensor.

    If the circuit is not as specified, inspect the circuits connected to other parts.

  23. INSPECT OPEN DOOR WARNING LIGHT 

    Disconnect the connector from the door courtesy switch, and ground terminal 1 on the wire harness side connector and check that the warning light lights up.

    If the warning light does not light up, inspect the bulb or wire harness.

  24. INSPECT DOOR COURTESY SWITCH (See  INSPECTION  ) 
    Fig 26: Inspecting Open Door Warning Light
    G02879425Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  25. INSPECT SEAT BELT WARNING LIGHT 
    1. Disconnect the connector from the terminals buckle switch and ground terminal on the wire harness side connector as shown in Fig 27 .
    2. 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.

    Fig 27: Inspecting Seat Belt Warning Light
    G02879426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  26. INSPECT BUCKLE SWITCH CONTINUITY 
    1. Check that continuity exists between the terminals on the switch side connector with the switch ON (belt unfastened).
    2. Check that no continuity exists between the terminals on the switch side connector with the switch OFF (belt fastened).
    Fig 28: Inspecting Buckle Switch Continuity
    G02879427Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. INSPECT WASHER LEVEL WARNING LIGHT 
    1. Disconnect the connectors from the level warning switch.
    2. Connect terminals on the wire harness side connector of the level warning switch connector.
    3. Turn the ignition switch ON, check that the warning light come on.

    If the warning light does not light up, test the bulb.

    Fig 29: Inspecting Washer Level Warning Light
    G02879428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  28. INSPECT WASHER LEVEL WARNING SWITCH 
    1. Check that no continuity exists between terminals with the switch OFF (float up).
    2. Check that continuity exists between terminals with the switch ON (float down).

    If operation is not as specified, replace the switch.

    Fig 30: Inspecting Washer Level Waring Switch
    G02879429Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  29. INSPECT WASHER FLUID LEVEL WARNING SWITCH CIRCUIT 

    Disconnect the switch connector and inspect the connector on wire harness side.

    TESTER CONNECTION AND CONTINUITY

    Tester connection Condition Specified condition
    2 - Ground Constant Continuity

    If the warning light does not light up, test the bulb or inspect wire harness.

    Fig 31: Identifying Connector Terminal
    G02879430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  30. INSPECT LIGHT CONTROL RHEOSTAT OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative lead (-) to terminal 3.
    2. Connect the positive (+) lead from the voltmeter to terminal 2 and the negative lead (-) to terminal 3.
    3. Turn the rheostat knob and check that the voltage changes.

    If operation is not as specified, replace switch.

    Fig 32: Inspecting Light Control Rheostat Operation
    G02879431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. 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 (electric resistance <100Ω).

    If continuity is not as specified, replace the sensor.

    Fig 33: Identifying Connector Terminal
    G02879432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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