FixVault
Home › Toyota › 2002 › Corolla LE, Standard › Repair and Diagnosis › External Pages › Different car › Section 245 (Combination Meter) › Combination Meter › Inspection

Combination Meter: Inspection

WARNING: This page is about a different car, the 2002 Toyota ECHO. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connector connected, 

    Inspect combination meter circuit  .

    Connect the connector "A" and "B" to the combination meter and inspect the wire harness side connectors from the back side as shown in the table.

    Fig 1: Identifying Combination Meter Connectors & Terminals
    G01894795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Combination Meter Terminal Specification Chart (1 Of 3)
    G01894796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Combination Meter Terminal Specification Chart (2 Of 3)
    G01894797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Combination Meter Terminal Specification Chart (3 Of 3)
    G01894798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    2. NOTE: Tire wear and tire over or under inflation will increase the indication error.
    Fig 5: Speedometer Allowable Indication Error Chart
    G01894799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Inspect speedometer on-vehicle  :

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

    If error is excessive, replace the speedometer.

  3. 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. NOTE: The voltage change should be 4 times for every revolution of the speed sensor shaft.
      Fig 6: Testing Vehicle Speed Sensor
      G01894800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check that there is voltage change from approx. 0 V to 11 V or more between terminals 2 and 3.

    If operation is not as specified, replace the sensor.

  4. Inspect fuel receiver gauge operation  :
    1. Disconnect the connector from the sender gauge.
    2. Turn the ignition switch ON, check that the receiver gauge needle indicates EMPTY.
      Fig 7: Testing Fuel Receiver Gauge Operation (1 Of 2)
      G01894801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. NOTE: Because of the silicon oil in the gauge, it will take a short time for needle to stabilize.
      Fig 8: Testing Fuel Receiver Gauge Operation (2 Of 2)
      G01894802Courtesy 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 the receiver gauge needle moves towards the full side.

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

  5. Inspect fuel sender gauge resistance  :

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

    Fig 9: Identifying Fuel Sender Gauge Positions & Connector Terminals
    G01894804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 10: Fuel Sender Gauge Specifications Chart
    G01894803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If resistance value is not as specified, replace the sender

  6. Inspect engine coolant temperature receiver gauge warning light  :
    1. Disconnect the connector from the sender gauge.
    2. Turn the ignition switch ON and check that the COOL warning light lights up.
      Fig 11: Engine Coolant Temperature Sender Testing Procedure (1 OF 2)
      G01894805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Ground terminal 2 on the wire harness side, and check that the HOT warning light lights up.
      Fig 12: Engine Coolant Temperature Sender Testing Procedure (2 OF 2)
      G01894806Courtesy 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.

  7. 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.

    Fig 13: Testing Engine Coolant Temperature Sender Resistance
    G01894808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 14: Engine Coolant Temperature Sender Specifications Chart
    G01894807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  8. Inspection 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 15: Testing Low Oil Pressure Warning Light
      G01894809Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  9. Inspect low oil pressure switch continuity  :
    1. Disconnect the connector from the switch.
      2. NOTE: Oil pressure should be over 24.5 kPa (0.25 kgf/cm2 , 3.55 psi).
      Fig 16: Testing Low Oil Pressure Switch
      G01894810Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

    If operation is not as specified, replace the switch.

  10. Inspect brake warning light  :
    1. Disconnect the connector from the brake fluid warning switch.
      Fig 17: Testing Brake Warning Light
      G01894811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

  11. Inspect brake fluid level warning switch continuity  :
    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 18: Testing Brake Fluid Level Warning Switch Continuity
      G01894812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Use 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.

  12. Inspect parking brake switch continuity  :
    1. Check that continuity exists between the terminal and switch body with the switch ON (switch pin released).
      Fig 19: Testing Parking Brake Switch Continuity
      G01894813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that no continuity exists between the terminal and switch body with the switch OFF (switch pin pushed in).

      If operation in not as specified, replace the switch or inspect ground point.

  13. Inspection window washer level warning light  :
    1. Disconnect the connector from the warning switch and ground terminal on the wire harness side connector.
      Fig 20: Testing Window Washer Level Warning Light Operation
      G01894814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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.

  14. Inspect window washer level warning switch continuity  :
    1. Check that there is no continuity between the terminals with the switch OFF (float up).
      Fig 21: Testing Window Washer Level Warning Light Continuity
      G01894815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that there is continuity between the terminals with the switch ON (float down)

      If operation is not as specified, replace the switch or inspect ground point.

  15. Inspect open door warning light  :

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

    Fig 22: Testing Open Door Warning Light Operation
    G01894816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  16. Inspect seat belt warning light  :
    1. Disconnect the connector from the buckle switch and ground terminal on the wire harness side connector.
      Fig 23: Testing Seat Belt Warning Light Operation
      G01894817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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.

  17. Inspect buckle switch continuity  :
    1. Check that continuity exists between the terminals on the switch side connector with the switch ON (belt fastened).
      Fig 24: Testing Buckle Switch Continuity
      G01894818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that no continuity exists between the terminals on the switch side connector with the switch OFF (belt unfastened).

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

  18. Passenger's seat only: 

    Inspect seat belt warning occupant detection sensor continuity  :

    Fig 25: Testing Passenger's Side Occupant Detection Sensor
    G01894819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    If operation is not s specified, replace the sensor.

  19. Inspect light control rheostat  :
    1. Turn the rheostat knob OFF, and check that there is no continuity between terminals. (Rheostat knob turned to fully counterclockwise.)
      Fig 26: Testing Light Control Rheostat
      G01894820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Gradually, turn the rheostat knob from the dark side to bright side, and check that the resistance decreases from 10 to 0 Ω (Rheostat knob turned to clockwise.)

      If operation is not as specified, replace the rheostat.

About FixVault