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Combination Meter: Inspection

  1. CHECK COMBINATION METER CIRCUIT 

    Check the meter terminals with the connectors connected.

    Fig 1: Identifying Combination Meter Connectors
    G02640892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying Combination Meter Connector Terminals Reference Chart
    G02640893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    *1 :w/ABS

    *2 :w/ABS

    *3 : Reference the oscilloscope data in the table below.

    Fig 3: Oscilloscope Data Chart
    G02640894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    OSCILLOSCOPE DATA

    Item Contents
    Tool setting 10 V/DIV, 20 ms/DIV
    Vehicle condition Engine idle speed

    *4 Reference the oscilloscope data in the table below.

    Fig 4: Oscilloscope Data Chart
    G02640895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    OSCILLOSCOPE DATA

    Item Contents
    Tool setting 10 V/DIV, 20 ms/DIV
    Vehicle condition Engine idle speed

    *5 Reference the oscilloscope data in the table below.

    Fig 5: Oscilloscope Data Chart
    G02640896Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    OSCILLOSCOPE DATA

    Item Contents
    Tool setting 5 V/DIV, 100 ms/DIV
    Vehicle condition Ignition switch ON

    "A" changes according to the coolant temperature.

    COOLANT TEMPERATURE SPECIFICATION

    Coolant Temperature A
    30°C (86°F) or less Approx. 82 ms
    Approx. 75°C (167°F) Approx. 377 ms
    90°C (194°F) or more Approx. 410 ms
  2. CHECK 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: Standard Indication & Allowable Range Chart
    G02640897Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the indicated value is out of the allowable range, replace the combination meter (see REMOVAL ).

  3. CHECK 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 reading with the tachometer reading.

      RPM (DC 13.5 V, 25°C (77°F) 

      ( ): Reference 

      STANDARD INDICATION AND ALLOWABLE RANGE

      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

      If the indicated value is out of the allowable range, replace the combination meter (see REMOVAL ).

  4. CHECK FUEL RECEIVER GAUGE OPERATION 

    HINT:

    Park the vehicle in a flat area.

    1. Disconnect the connector from the main fuel pump assembly.
    2. Turn the ignition switch ON and check if the receiver gauge needle indicates EMPTY.
      Fig 7: Disconnecting Connector From Main Fuel Pump Assembly
      G02640898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect terminals 2 and 3 of the wire harness side connector with a 3.4 W test bulb.
    4. Turn the ignition switch ON and check if the bulb lights up and the receiver gauge needle indicates FULL.

    If operation is not as specified, inspect the main fuel sender gauge and sub sender gauge resistance.

    Fig 8: Connecting Terminals 2 & 3 Of The Wire Harness Side Connector With A 3.4 W Test Bulb
    G02640899Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT MAIN FUEL SENDER GAUGE RESISTANCE 

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

    RESISTANCE SPECIFICATION

    Float Position: mm (in.) Resistance (Ω)
    F: Approx. 70.0 (2.76) Approx. 2
    E: Approx. 167.6 (6.60) Approx. 54

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

    Fig 9: Inspecting Main Fuel Sender Gauge Resistance
    G02640900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT SUB FUEL SENDER GAUGE RESISTANCE 

    Measure the resistance between terminals 1 and 2 for each float position.

    RESISTANCE SPECIFICATION

    Float Position: mm (in.) Resistance (Ω)
    F: Approx. 52.1 (2.05) Approx. 2
    E: Approx. 177.0 (6.97) Approx. 53

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

    Fig 10: Inspecting Sub Fuel Sender Gauge Resistance
    G02640901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. CHECK 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 and check if the warning light lights up.

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

    Fig 11: Checking Low Oil Pressure Warning Light
    G02640902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY 
    1. Check if continuity exists between the terminal and ground with the engine stopped.
    2. Check if no continuity exists between the 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 operation is not as specified, replace the switch.

    Fig 12: Inspecting Low Oil Pressure Switch Continuity
    G02640903Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. CHECK BRAKE WARNING SYSTEM LIGHT 
    1. Disconnect the connector from the brake fluid warning switch.
    2. Connect the terminals of the level warning switch wire harness side connector.
    3. Start the engine. Check if the warning light lights up.

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

    Fig 13: Checking Brake Warning System Light
    G02640904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. CHECK BRAKE FLUID LEVEL WARNING SWITCH CONTINUITY 
    1. Remove the reservoir cap and strainer.
    2. Disconnect the connector.
    3. Check if no continuity exists between the terminals with the switch OFF (float up).
    4. Use a syphon or other instrument to take fluid out of the reservoir.
    5. Check if continuity exists between the terminals with the switch ON (float down).
    6. Pour the fluid back in the reservoir.

    If operation is not as specified, replace the switch.

    Fig 14: Checking Brake Fluid Level Warning Switch Continuity
    G02640905Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. CHECK PARKING BRAKE WARNING LIGHT 
    1. Disconnect the connector from the parking brake switch.
    2. Ground the terminal of the wire harness side connector.
    3. Start the engine. Check if the warning light lights up.

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

    Fig 15: Checking Parking Brake Warning Light
    G02640906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT PARKING BRAKE SWITCH CONTINUITY 
    1. Check if continuity exists between the terminal and switch body with the switch ON (switch pin released).
    2. Check if no continuity exists between the terminal and switch body with the switch OFF (switch pin pushed in).

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

    Fig 16: Inspecting Parking Brake Switch Continuity
    G02640907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. Except back door: CHECK OPEN DOOR WARNING LIGHT 
    1. Disconnect the connector from the door courtesy switch.
    2. Ground the terminal of the wire harness side connector.
    3. Start the engine. Check if the warning light lights up.

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

    Fig 17: Checking Open Door Warning Light (Except Back Door)
    G02640908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. Back door only: CHECK OPEN DOOR WARNING LIGHT 
    1. Disconnect the connector from the back door courtesy switch and ground the terminal on the wire harness side connector.
    2. Start the engine. Check if the warning light lights up.

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

    Fig 18: Checking Open Door Warning Light (Back Door Only)
    G02640909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. Driver's side: CHECK SEAT BELT WARNING LIGHT 
    1. Disconnect the connector from the buckle switch and ground the terminal on the wire harness side connector.
    2. Turn the ignition switch ON and check if the warning light lights up.

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

    Fig 19: Checking Seat Belt Warning Light (Driver's Side)
    G02640910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. Driver's side: INSPECT BUCKLE SWITCH CONTINUITY 
    1. Check if continuity exists between terminals 2 and 3 of the connector (A) with the switch ON (belt unfastened).
    2. Check if no continuity exists between terminals 2 and 3 of the connector (A) with the switch OFF (belt fastened).

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

    Fig 20: Inspecting Buckle Switch Continuity (Driver's Side)
    G02640911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. Passenger's side: INSPECT BUCKLE SWITCH CONTINUITY 
    1. Check if continuity exists between terminals 1 and 2 of the connector (A) with the switch ON (belt unfastened).
    2. Check if no continuity exists between terminals 1 and 2 of the connector (A) with the switch OFF (belt fastened).

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

    Fig 21: Inspecting Buckle Switch Continuity (Passenger's Side)
    G02640912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. Passenger's seat only: INSPECT SEAT BELT WARNING OCCUPANT DETECTION SENSOR CONTINUITY 

    Press the sensing part and check if continuity exists between terminals 1 and 2.

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

    Fig 22: Inspect Seat Belt Warning Occupant Detection Sensor Continuity (Passenger's Seat Only)
    G02640913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. INSPECT LIGHT CONTROL RHEOSTAT OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and negative lead (-) to terminal 3.
    2. Connect the positive (+) lead from the voltmeter to terminal 2 and negative lead to terminal 3.
    3. Turn the rheostat knob and check if the voltage changes.

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

    Fig 23: Inspecting Light Control Rheostat Operation
    G02640914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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