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Combination Meter: Inspection

  1. INSPECT SPEEDOMETER ON-VEHICLE 

    Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer.

    NOTE:

    Tire wear and tire over or under inflation will increase the indication error.

    If error is excessive, replace the speedometer.

    SPEEDOMETER STANDARD INDICATION AND ALLOWABLE RANGE (USA/CANADA)

    USA (mph) CANADA (km/h)
    Standard Indication Allowable Range Standard Indication Allowable Range
    20 19 - 22 20 18 - 23
    40 39 - 42.5 40 40 - 44
    60 59.5 - 63.5 60 60 - 64.5
    80 79.5 - 84 80 80 - 85
    100 100 - 105 100 100 - 105
    - - 120 120 - 125.5
    - - 140 140 - 146
    - - 160 160 - 167
  2. INSPECT VEHICLE SPEED SENSOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 2.
    2. Connect the positive (+) lead from the 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.
    NOTE:

    The voltage change should be performed 4 times for every revolution of the speed sensor shaft.

    If operation is not as specified, replace the sensor.

    Fig 1: Inspecting Vehicle Speed Sensor Operation
    G03079765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. 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 20°C at (68°F) 

      TACHOMETER STANDARD INDICATION AND ALLOWABLE RANGE

      Standard indication (rpm) Allowable range (rpm)
      700 630 - 770
      3,000 2,850 - 3,150
      5,000 4,850 - 5,150
      7,000 6,790 - 7,210

    If error is excessive, replace the tachometer.

  4. INSPECT FUEL RECEIVER GAUGE OPERATION 
    Fig 2: Inspecting Fuel Receiver Gauge Operation (1 of 2)
    G03079766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the sender gauge.
    2. Turn the ignition switch ON, and check that the receiver gauge needle indicates EMPTY.
    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 the receiver gauge needle moves toward FULL side.
      Fig 3: Inspecting Fuel Receiver Gauge Operation (2 of 2)
      G03079767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    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.

  5. INSPECT FUEL RECEIVER GAUGE RESISTANCE 

    Measure the resistance between terminals.

    Fig 4: Identifying Fuel Receiver Gauge Terminals
    G03079768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    w/ Tachometer: 

    FUEL RECEIVER GAUGE TERMINALS RESISTANCE (W/TACHOMETER)

    Between terminals Resistance (Ω)
    A - B Approx. 137
    A - C Approx. 260.3
    B - C Approx. 123.3

    w/o Tachometer: 

    FUEL RECEIVER GAUGE TERMINALS RESISTANCE (W/O TACHOMETER)

    Between terminals Resistance (Ω)
    A - B Approx. 160
    A - C Approx. 84
    B - C Approx. 244

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

  6. INSPECT FUEL SENDER GAUGE RESISTANCE 

    Measure the resistance between terminals 2 and 3.

    Fig 5: Measuring Resistance Between Terminals 2 & 3(70 Liter Tank)
    G03079769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    70 liter tank: 

    FUEL SENDER GAUGE FLOAT POSITION AND RESISTANCE (70 LITER TANK)

    Float position mm (in.) Resistance (Ω)
    F: Approx. 82.7 (3.26) F: Approx. 3.0
    1/2: 17.1 (0.67) 1/2: Approx. 30.8
    E: Approx. 124.6(4.91) E: Approx. 110.0
    Fig 6: Measuring Resistance Between Terminals 2 & 3 (60 Liter Tank)
    G03079770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    60 liter tank: 

    FUEL SENDER GAUGE FLOAT POSITION AND RESISTANCE (60 LITER TANK)

    Float position mm (in.) Resistance (Ω)
    F: Approx. 69.3 (2.73) F: Approx. 3.0
    1/2: 20.1 (0.79) 1/2: Approx. 30.8
    E: Approx. 108.8(4.28) E: Approx. 110.0

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

  7. 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 and check that the warning light lights up.
      Fig 7: Inspecting Fuel Level Warning Light
      G03079771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  8. INSPECT FUEL LEVEL WARNING SWITCH 
    1. Apply battery positive voltage between terminals 1 and 3, and through a 3.4 W test bulb, and check that the bulb lights up.
      Fig 8: Inspecting Fuel Level Warning Switch (1 Of 2)
      G03079772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      It will take a short time for bulb to light up.

    2. Submerge the switch in fuel and check that the bulb goes out.
      Fig 9: Inspecting Fuel Level Warning Switch (2 Of 2)
      G03079773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the sender gauge.

  9. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE OPERATION 
    1. Disconnect the connector from the sender gauge.
    2. Turn the ignition switch ON and check that the receiver gauge needle indicates COOL.
      Fig 10: Inspecting Engine Coolant Temperature Gauge Operation (1 of 2)
      G03079774Courtesy 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, and check that the bulb lights up and the receiver gauge needle moves to the hot side.
      Fig 11: Inspecting Engine Coolant Temperature Gauge Operation (2 of 2)
      G03079775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is as specified, replace the sender gauge. Then, re-check 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.

    Fig 12: Identifying Engine Coolant Temperature Receiver Gauge Terminals
    G03079776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    w/ Tachometer 

    ENGINE COOLANT TEMPERATURE RECEIVER GAUGE SPECIFICATIONS (W/TACHOMETER)

    Between terminals Resistance (Ω)
    A - B Approx. 256.5
    A - C Approx. 181.5
    B - C Approx. 75

    w/o Tachometer 

    ENGINE COOLANT TEMPERATURE RECEIVER GAUGE SPECIFICATIONS (W/O TACHOMETER)

    Between terminals Resistance (Ω)
    A - B Approx. 139
    A - C Approx. 75
    B - C Approx. 214
    NOTE:

    Connect the test leads so that the current from the ohmmeter can flow as shown in the above table. 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 Fig 13, and adjust the ammeter pointer to indicate "0" using the slide rheostat, then read the rheostat indication.

    Fig 13: Inspecting Engine Coolant Temperature Sender Gauge Resistance
    G03079777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEMPERATURE AND RESISTANCE

    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 temperature sender gauge.

  12. 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 and check that the warning light lights up.
      Fig 14: Inspecting Low Oil Pressure Warning Light
      G03079778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  13. INSPECT LOW OIL PRESSURE SWITCH 
    Fig 15: Inspecting Low Oil Pressure Switch
    G03079779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connector from the switch.
    2. Check that continuity exists between terminal and ground with the engine stopped.
    3. Check that no continuity exists between terminal and ground with the engine running.
    NOTE:

    Oil pressure should be over 49 kPa (0.5 kgf/cm2 , 7.1 psi).

    If operation is not as specified, replace the switch.

  14. INSPECT BRAKE WARNING LIGHT 
    1. Disconnect the connectors from the level warning switch and parking brake switch.
    2. Connect terminals on the wire harness side connector of the level warning switch connector.
    3. Turn the ignition switch ON and check that the warning light lights up.
      Fig 16: Inspecting Brake Warning Light
      G03079780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  15. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY 
    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).
      3. Fig 17: Inspecting Brake Fluid Level Warning Switch Terminals Continuity
      G03079781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the switch.

  16. INSPECT PARKING BRAKE SWITCH CONTINUITY 
    1. Check that continuity exists between terminals with the switch ON (switch pin released).
    2. Check that no continuity exists between terminals with the switch OFF (switch pin pushed in).
      Fig 18: Inspecting Parking Brake Switch Continuity
      G03079782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the switch.

  17. INSPECT WASHER LEVEL WARNING LIGHT 
    1. Disconnect the connectors from the level warning switch and parking brake switch.
      Fig 19: Inspecting Washer Level Warning Light
      G03079783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals on the wire harness side connector of the level warning switch connector.
    3. 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.

  18. INSPECT WASHER LEVEL SWITCH 
    1. Check that no continuity exists between terminals 3 and 4 with the switch OFF (float up).
    2. Check that continuity exists between terminals 3 and 4 with the switch ON (float down).
      Fig 20: Inspecting Washer Level Switch Terminals
      G03079784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the switch.

  19. INSPECT SEAT BELT WARNING LIGHT 
    1. Remove the body ECU connector from the No. 1 J/B.
    2. Ground terminal 19 on the wire harness side connector.
    3. Turn the ignition switch ON and check that the warning light lights up.
      Fig 21: Inspecting Seat Belt Warning Light
      G03079785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  20. INSPECT BUCKLE SWITCH CONTINUITY 
    1. Check that continuity exists between terminals on the switch side connector with the switch ON (belt unfastened).
    2. Check that no continuity exists between terminals on the switch side connector with the switch OFF (belt fastened).
      Fig 22: Inspecting Buckle Switch Terminal Continuity
      G03079786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the seat belt inner.

  21. w/o Tachometer (Resister Type): 

    INSPECT LIGHT CONTROL RHEOSTAT 

    1. Turn the rheostat knob OFF and check that no continuity exists between terminals (Rheostat knob turned fully counterclockwise).
    2. Gradually, turn the rheostat knob from the dark side to bright side and check that the resistance decreases from 10 to 0 (Rheostat knob turned clockwise)
      Fig 23: Inspecting Light Control Rheostat (Resister Type)
      G03079787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the rheostat.

  22. w/Tachometer (Electrical Type): 

    INSPECT LIGHT CONTROL RHEOSTAT 

    1. Connect terminals 1 and 3 through a 3.4 W test bulb.
    2. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2.
      Fig 24: Inspecting Light Control Rheostat (Electrical Type)
      G03079788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the rheostat knob fully counterclockwise and check that the test bulb goes out.
    4. Gradually turn the rheostat knob clockwise and check that the test bulb brightness changes from dark to bright.

    If operation is not as specified, replace the rheostat.

  23. INSPECT BULB CHECK RELAY OPERATION 
    1. 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.
    2. Connect the positive (+) lead from the battery to terminal A and check that the test bulb lights up.
      Fig 25: Inspecting Bulb Check Relay Operation
      G03079789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the relay.

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