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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.

    HINT:

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

    SPEEDOMETER SPECIFICATIONS

    (mph)
    Standard indication Allowable range
    20 19-22
    40 39-42.5
    60 59.5-63.5
    80 80-85
    100 100-105.5
    120 120-125.5
    140 140-146

    If the error is excessive, replace the combination meter.

  2. INSPECT SPEEDOMETER RESISTANCE 

    Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

    Fig 1: Inspecting Speedometer Resistance
    G02837675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SPEEDOMETER RESISTANCE SPECIFICATIONS

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

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

  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.
    2. Compare the tester indications with tachometer indications.

      RPM (DC 13.5 V, 25°C (77°F)) 

      TACHOMETER SPECIFICATIONS

      Standard indication (RPM) Allowable range (RPM)
      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 5,800 - 6,200
      7,000 6,800 - 7,200

    If the error is excessive, replace the combination meter.

  4. INSPECT TACHOMETER RESISTANCE 

    Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

    Fig 2: Inspecting Tachometer Resistance
    G02837676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TACHOMETER RESISTANCE SPECIFICATIONS

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

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

  5. INSPECT FUEL RECEIVER GAUGE OPERATION 
    1. Disconnect the connector from the fuel pump assembly.
    2. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.
      Fig 3: Inspecting Fuel Receiver Gauge Operation (1 Of 2)
      G02837677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect terminals 2 and 3 of 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 indicators EMPTY.

    If the operation is not as specified, inspect the sender gauge resistance.

    Fig 4: Inspecting Fuel Receiver Gauge Operation (2 Of 2)
    G02837678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT FUEL RECEIVER GAUGE RESISTANCE 

    Measure the resistance between terminals with an ohmmeter at the positions shown in the illustration.

    Fig 5: Inspecting Fuel Receiver Gauge Resistance
    G02837679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    FUEL RECEIVER GAUGE RESISTANCE SPECIFICATIONS

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

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

  7. INSPECT FUEL SENDER GAUGE RESISTANCE 

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

    Fig 6: Inspecting Fuel Sender Gauge Resistance
    G02837680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    FUEL SENDER GAUGE RESISTANCE SPECIFICATIONS

    Float position: mm (in.) Resistance (Ω)
    F: Approx. 68.8 (2.71) Approx. 16.4
    E: Approx. 207.4 (8.17) Approx. 192.7

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

  8. INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE RESISTANCE 

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

    Fig 7: Inspecting Engine Coolant Temperature Receiver Gauge Resistance
    G02837681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ENGINE COOLANT TEMPERATURE RECEIVER GAUGE RESISTANCE SPECIFICATIONS

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

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

  9. INSPECT LOW OIL PRESSURE WARNING LIGHT 
    1. Disconnect the connector from the warning switch and ground terminal of 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 LED or inspect wire harness.

    Fig 8: Inspecting Low Oil Pressure Warning Light
    G02837682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY 
    1. Check that continuity exists between terminal and ground with the engine stopped.
    2. Check that no continuity exists between terminal and ground with the engine running.

    HINT:

    The oil pressure should be over 24.5 kPa (0.25 kgf/cm2 , 3.55 psi).

    If the operation is not as specified, replace the switch.

    Fig 9: Inspecting Low Oil Pressure Switch Continuity
    G02837683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. INSPECT BRAKE WARNING SYSTEM LIGHT 
    1. Disconnect the connector from the brake fluid warning switch.
    2. Connect terminals of the wire harness side of the level warning switch connector.
    3. Start the engine, check that the warning light lights up.

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

    Fig 10: Inspecting Brake Warning System Light
    G02837684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY 
    1. Remove the reservoir cap and strainer.
    2. Disconnect the connector.
    3. Check that no continuity exists between terminals with the switch OFF (float up).
    4. Use syphon, etc. to take fluid out of the reservoir.
    5. Check that continuity exists between terminals with the switch ON (float down).
      Fig 11: Inspecting Brake Fluid Level Warning Switch Continuity
      G02837685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Pour the fluid back in the reservoir.

    If the operation is not as specified, replace the switch.

  13. INSPECT PARKING BRAKE WARNING LIGHT 
    1. Disconnect the connector from the parking brake switch.
    2. Ground terminal of the wire harness side connector.
    3. Start the engine, check that the warning light lights up.

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

    Fig 12: Inspecting Parking Brake Warning Light
    G02837686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. INSPECT PARKING BRAKE 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 the operation is not as specified, replace the switch or inspect ground point.

    Fig 13: Inspecting Parking Brake Switch Continuity
    G02837687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. INSPECT OPEN DOOR WARNING LIGHT 
    1. Disconnect the connector from the door courtesy switch.
    2. Ground terminal of the wire harness side connector.
    3. Start the engine, check that the warning light lights up.

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

    Fig 14: Inspecting Open Door Warning Light
    G02837688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. Driver's side: INSPECT SEAT BELT WARNING LIGHT 
    1. Disconnect the connector from buckle switch and ground terminal on the wire harness side connector.
    2. Turn the ignition switch ON and check that the warning light lights up.

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

    Fig 15: Inspecting Seat Belt Warning Light
    G02837689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. Driver's side: INSPECT BUCKLE SWITCH CONTINUITY (See  INSPECTION  ). 
  18. Passenger's side: INSPECT BUCKLE SWITCH CONTINUITY 
    1. Check that continuity exists between terminals 1 and 3 the switch side connectors with the switch OFF (belt fastened).
    2. Check that no continuity exists between terminals 1 and 3 the switch side connectors with the switch ON (belt unfastened).

    If the operation is not as specified, replace the switch.

    Fig 16: Inspecting Buckle Switch Continuity
    G02837690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. Passenger's seat only: INSPECT SEAT BELT WARNING OCCUPANT DETECTION SENSOR CONTINUITY 

    Check that continuity exists between terminals 1 and 2 when pressing the sensing part.

    If the operation is not as specified, replace the seat cushion pad with sensor.

    Fig 17: Inspecting Seat Belt Warning Occupant Detection Sensor Continuity
    G02837691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. INSPECT LIGHT CONTROL RHEOSTAT OPERATION 

    Gradually, turn the rheostat knob from the bright side to the dark side and check that the resistance decreases from 10 kΩ to 0 Ω between terminals 4 and 5. (Rheostat knob turned to clockwise)

    If the operation is not as specified, replace the light control rheostat.

    Fig 18: Inspecting Light Control Rheostat Operation
    G02837692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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