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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 CONNECTION CONDITION .

    Fig 1: Identifying Combination Meter A And B Connector Terminal
    G02844984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTION CONDITION

    Tester Connection Condition Specified Condition
    A1 - Ground (ILL - Body ground) Ignition switch ON and tail cancel switch ON or OFF Below 1V or 4.5 - 5.5V
    A2 - Ground (E - Body ground) Constant Continuity
    A3 - Ground (OPO - Body ground) Ignition switch ON and trip reset switch ON or OFF Below 1V or 4.5 - 5.5V
    A9 - Ground (SI - Body ground) Ignition switch ON and slowly turn drive wheel Below 1V or 10 - 14V
    A10 - Ground (LP - Body ground) Ignition switch ON and ABS indicator ON or OFF Below 1V or 10 - 14V
    A11 - Ground (L - Body ground) Ignition switch ON Pulse generation
    A13 - Ground (+S - Body ground) Ignition switch ON and slowly turn drive wheel Below 1V or 10 - 14V
    A13 - Ground (+S - Body ground) Ignition switch ON and slowly turn drive wheel Below 1V or 4.5 - 5.5V
    A14 - Ground (ES - Body ground) Constant Continuity
    A15 - Ground (EP - Body ground) Constant Continuity
    A16 - Ground (SW - Body ground) Ignition switch ON and air bag indicator light ON or OFF Below 1V or 10 - 14V
    A17 - Ground (S - Body ground) Headlight dimmer switch Hi or Low Below 1V or 10 - 14V
    A18 - Ground (B - Body ground) Ignition switch ON and turn signal switch right Below 1V or 10 - 14V
    A19 - Ground (B - Body ground) Ignition switch ON and turn signal switch left Below 1V or 10 - 14V
    A21 - Ground (B - Body ground) Constant 10 - 14V
    A22 - Ground (IG - Body ground) Ignition switch OFF or ON Below 1V or 10 - 14V
    B1 - Ground (ROUT - Body ground) Ignition switch ON and shift lever position is "R" or except "R" Below 1V or 10 - 14V
    B2 - Ground (MPX+ - Body ground) Ignition switch ON Pulse generation
    B3 - Ground (MPX - Body ground) Ignition switch ON Pulse generation
    B5 - Ground (ACC - Body ground) Ignition switch ACC 10 - 14V
  2. 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

    (mph) (km/h)
    Standard indication Allowable range Standard indication Allowable range
    20 18- 22 20 18 - 22
    40 38 - 42 40 38 - 42
    60 59 - 63 60 58 - 62
    80 79 - 83 80 78 - 82
    100 99 - 104 100 97 - 103
    120 119 - 125 120 117 - 123
    - - 140 137 - 143
    - - 160 157 - 163
  3. INSPECT INPUT SPEED SIGNAL 

    While driving the vehicle at 10 km/h, measure the voltage between connector terminals A9 and A14 of the combination meter.

    Fig 2: Identifying Combination Meter Connector Terminals
    G02844985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: Change between Hi and LO is repeated 7 time for 1 second. 

    NOTE:

    Check it the ignition switch ON and the connector connected.

  4. INSPECT OUTPUT SPEED SIGNAL 

    While driving the vehicle at 10 km/h, measure the voltage between connector terminal A13 and A14 of the combination meter.

    Fig 3: Identifying Combination Meter Connector Terminals
    G02844986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: Change between Hi and LO is repeated 7 time for 1 second. 

    NOTE:

    Check it the ignition switch ON and the connector connected.

  5. INSPECT FUEL SENDER GAUGE 

    Measure the resistance between terminals 1 and 6 for each fuel level.

    Fig 4: Identifying Fuel Sender Gauge Connector Terminals
    G02844987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    The fuel sender gauge cannot be removed.

    As the resistance value changes according to the remaining fuel amount, refer to the above standard value.

    FUEL LEVEL RESISTANCE

    Fuel level Resistance (Ω)
    Full Approx. 430
    Half Approx. 1000 - 2000
    Empty Approx. 5000

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

  6. INSPECT TEMPERATURE SENDER RESISTANCE 

    Measure the resistance between terminal 4 and 8 If the resistance value is not in the following area, replace fuel tank.

    Fig 5: Identifying Fuel Sender Gauge Terminals
    G02844988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    1.5 - 100 (Ω) at 0 - 30°C 

  7. INSPECT LOW OIL PRESSURE WARNING LIGHT 
    1. Disconnect the connector from the warning switch and ground terminal of the wire harness side connector.
      Fig 6: Inspecting Low Oil Pressure Warning Light
      G02844989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

  8. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY 
    1. Check that continuity exists between terminal and ground with the engine stopped.
      Fig 7: Inspecting Low Oil Pressure Switch Continuity
      G02844990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that no continuity exists between terminal and ground with the engine running.
      NOTE:

      Oil pressure should be over 24.5 kPa (0.25 kgf/cm2 , 3.55 psi) If operation is not as specified, replace the switch.

  9. 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.
      Fig 8: Inspecting Brake Warning System Light
      G02844991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine, check that the warning light lights up. If the warning light does not light up, test the bulb or wire harness.
  10. 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 terminals with the switch OFF (float up).
      Fig 9: Inspecting Brake Fluid Level Warning Switch Continuity
      G02844992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Use siphon, etc. to take fluid out of the reservoir tank.
    5. Check that continuity exists between 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.

  11. INSPECT PARKING BRAKE WARNING LIGHT 
    1. Disconnect the connector from the parking brake switch.
    2. Ground terminal of the wire harness side connector.
      Fig 10: Inspecting Parking Brake Warning Light
      G02844993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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.

  12. INSPECT PARKING BRAKE SWITCH CONTINUITY 
    1. Check that continuity exists between terminal and switch body with the switch ON (switch pin released).
      Fig 11: Inspecting Parking Brake Switch Continuity
      G02844994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

  13. INSPECT OPEN DOOR WARNING LIGHT 

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

    Fig 12: Inspecting Open Door Warning Light
    G02844995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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