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Section 518 (Combination Meter): Inspection

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT SPEEDOMETER ON-VEHICLE 

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

    HINT:

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

    Fig 1: Speedometer On-Vehicle Table
    G02647063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the error is excessive, replace the speedometer.

  2. INSPECT INPUT VEHICLE SPEED SIGNAL WAVEFORM (A/T) 
    1. Remove the combination meter with connectors still connected.
    2. Connect the oscilloscope to terminal A-24 and body ground.
      Fig 2: Connecting Oscilloscope To Terminal A-24 And Body Ground
      G02647064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine.
    4. Check the signal waveform according to the condition(s) in INPUT VEHICLE SPEED SIGNAL WAVEFORM (A/T)  .
      INPUT VEHICLE SPEED SIGNAL WAVEFORM (A/T)

      Item Condition
      Tool setting 5 V/DIV, 20 ms/DIV
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      OK: As shown in  Fig 3 

    HINT:

    As vehicle speed increases, the cycle of the signal waveform narrows.

    Fig 3: Input Vehicle Speed Signal Waveform (A/T)
    G02647065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT INPUT VEHICLE SPEED SIGNAL WAVEFORM (M/T) 
    1. Shift the shift lever to neutral.
    2. Jack up either of the front wheel.
    3. Turn the ignition switch to ON.
    4. Measure the voltage between terminals 2 and 3 of speed sensor when the front wheel is turning slowly.

      Standard voltage: 

      Voltage is generated intermittently. 

    Fig 4: Measuring Voltage Between Terminals 2 And 3 Of Speed Sensor
    G02647067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Inspecting Input Vehicle Speed Signal Waveform (M/T)
    G02647066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. 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 the tachometer.
      • 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 at 20°C (68°F) 

    Fig 6: Tachometer On-Vehicle Table
    G02647068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the error is excessive, replace the tachometer.

  5. INSPECT INPUT TACHO SIGNAL WAVEFORM 
    1. Remove the combination meter with connector still connected.
    2. Connect the oscilloscope to terminal A-23 and body ground.
      Fig 7: Connecting Oscilloscope To Terminal A-23 And Body Ground
      G02647069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine.
    4. Check the signal waveform according to the condition(s) in INPUT TACHO SIGNAL WAVEFORM  .
      INPUT TACHO SIGNAL WAVEFORM

      Item Condition
      Tool setting 5 V/DIV, 10ms/DIV
      Vehicle condition Engine idle speed

      OK: As shown in  Fig 8 

    Fig 8: Inspecting Input Tacho Signal Waveform
    G02647070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT OUTPUT TACHO SIGNAL WAVEFORM 
    1. Remove the combination meter with connector still connected.
    2. Connect the oscilloscope to terminal A-25 and body ground.
      Fig 9: Connecting Oscilloscope To Terminal A-25 And Body Ground
      G02647071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine.
    4. Check the signal waveform according to the condition(s) in OUTPUT TACHO SIGNAL WAVEFORM  .
      OUTPUT TACHO SIGNAL WAVEFORM

      Item Condition
      Tool setting 5 V/DIV, 10 ms/DIV
      Vehicle condition Engine idle speed

      OK: As shown in  Fig 10 

    Fig 10: Inspecting Output Tacho Signal Waveform
    G02647072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT FUEL 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 EMPTY.
      Fig 11: Checking Receiver Needle Indicates EMPTY
      G02647073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect terminals 2 and 3 of the wire harness side connector through a 3.4 W test bulb.
      Fig 12: Connecting Terminals 2 And 3 Of Wire Harness Side Connector Through 3.4 W Test Bulb
      G02647074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn the ignition switch ON, and check that the bulb lights up and the receiver gauge needle moves towards the full side.

    HINT:

    Because of the silicon oil in the gauge, it will take a short time for needle to stabilize.

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

  8. INSPECT FUEL SENDER GAUGE RESISTANCE 

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

    RESISTANCE SPECIFICATION

    Float Position mm (in.) Resistance (Ω)
    SF: Approx. 116.5 (4.59) +/- 2.5 (0.10) Approx. 4.0
    1/2: Approx. 14 (0.55) Approx. 59.0
    W/L: Approx. 72.2 (2.84) Approx. 98.8
    SE: Approx. 100 (3.90) +/- 2.5 (0.10) Approx. 110.0 +/- 2.5
    Fig 13: Inspecting Fuel Sender Gauge Resistance
    G02647075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    Fig 14: Measuring Resistance Between Terminals 2 And 3 At Each Float Position
    G02647076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT FUEL LEVEL WARNING LIGHT 
    1. Disconnect the connector from the sender gauge.
    2. Connect terminals 1 and 3 of the wire harness side connector.
      Fig 15: Connecting Terminals 1 And 3 Of Wire Harness Side Connector
      G02647077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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.

  10. INSPECT FUEL LEVEL WARNING SWITCH 
    1. Apply battery voltage between terminals 1 and 3 through a 3.4 W test bulb, and check that the bulb lights up.

      HINT:

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

      Fig 16: Applying Battery Voltage Between Terminals 1 And 3 Through 3.4 W Test Bulb
      G02647078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Submerge the switch in fuel, and check that the bulb turns off.

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

    Fig 17: Submerging Switch In Fuel
    G02647079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. 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 side.
      Fig 18: Checking Receiver Gauge Needle Indicates Cool Side
      G02647080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Ground the terminal 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 the receiver gauge needle moves to the hot side.
    Fig 19: Checking Bulb Lights Up And Receiver Gauge Needle Moves To Hot Side
    G02647081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT INPUT ENGINE COOLANT TEMPERATURE SIGNAL WAVEFORM 
    1. Remove the combination meter with connectors still connected.
    2. Connect the oscilloscope to terminal A32 and body ground.
      Fig 20: Connecting Oscilloscope To Terminal A32 And Body Ground
      G02647082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Start the engine.
    4. Check the signal waveform according to the condition(s) in INPUT ENGINE COOLANT TEMPERATURE SIGNAL WAVEFORM  .
      INPUT ENGINE COOLANT TEMPERATURE SIGNAL WAVEFORM

      Item Condition
      Tool setting 5 V/DIV, 10 ms/DIV
      Vehicle condition Ignition switch ACC or ON

      OK: As shown in  Fig 21 

    Fig 21: Inspecting Input Engine Coolant Temperature Signal Waveform
    G02647083Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. INSPECT ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE 
    1. Disconnect the connector from the engine coolant temperature sender gauge.
    2. Measure the resistance according to the value(s) in the table below.
    ENGINE COOLANT TEMPERATURE SENDER GAUGE RESISTANCE

    Temperature °C (°F) Resistance (k°)
    -20 (-4) 13.54 to 16.63
    20 (68) 2.28 to 2.63
    80 (176) 0.31 to 0.33
    110 (230) 0.13 to 0.15
    Fig 22: Inspecting Engine Coolant Temperature Sender Gauge Resistance
    G02647084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  14. 1GR-FE (Standard cab): 

    INSPECT OIL PRESSURE SWITCH CONTINUITY 

    1. Disconnect the connector from the switch.
    2. Check that continuity exists between the terminal and ground with the engine stopped.
    3. Check that 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 the continuity is not as specified, replace the switch.

    Fig 23: Inspecting Oil Pressure Switch Continuity
    G02647085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. 1GR-FE (Access cab) and 2UZ-FE: 

    INSPECT OIL PRESSURE SENDER GAUGE CONTINUITY 

    1. Disconnect the connector from the sender gauge.
    2. Check that no continuity exists between the terminal and ground with the engine stopped.
    3. Check that continuity exists between the terminal and ground with the engine running.
    Fig 24: Inspecting Oil Pressure Sender Gauge Continuity (IGR-FE (Access Cab) and 2UZ-FE)
    G02647086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The oil pressure should be over 29.0 kPa (0.3 kgf/cm2 , 4.2 psi).

    If the continuity is not as specified, replace the seder gauge.

  16. INSPECT BRAKE WARNING LIGHT 
    1. Disconnect the connector from the brake fluid warning switch.
    2. Release the parking brake pedal.
    3. Connect the terminals on the harness side of the level warning switch connector.
    4. Start the engine, and check that the warning light lights up.

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

    Fig 25: Inspecting Brake Warning Light
    G02647087Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  17. 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).
    4. Use siphon to take fluid out of the reservoir tank.
    5. Check that continuity exists between the terminals with the switch ON (sink).

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

    6. Pour the fluid back in the reservoir tank.
    Fig 26: Inspecting Brake Fluid Level Warning Switch Continuity
    G02647088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. Double cab: 

    INSPECT PARKING BRAKE SWITCH CONTINUITY 

    1. Check that there is continuity between the terminal and switch body with the switch ON (switch pin released).
    2. Check that there is no continuity between the terminals with the switch OFF (switch pin pushed in).

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

    Fig 27: Inspecting Parking Brake Switch Continuity (Double Cab)
    G02647089Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. Except double cab (A/T): 

    INSPECT PARKING BRAKE SWITCH CONTINUITY 

    1. Check that there is continuity between the terminal and switch body with the switch ON (switch pin released).
    2. Check that there is no continuity between the terminals with the switch OFF (switch pin pushed in).

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

    Fig 28: Inspecting Parking Brake Switch Continuity (Except Double Cab (A/T))
    G02647090Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. Except double cab (M/T): 

    INSPECT PARKING BRAKE SWITCH CONTINUITY 

    1. Check that there is continuity between the terminals with the switch ON (switch pin released).
    2. Check that there is no continuity between the terminals with the switch OFF (switch pin pushed in).

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

    Fig 29: Inspecting Parking Brake Switch Continuity (Except Double Cab (M/T))
    G02647091Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. INSPECT WASHER LEVEL WARNING LIGHT 
    1. Disconnect the connectors from the level warning switch.
    2. Connect the terminals of the wire harness side of the level warning switch connector.
    3. Turn the ignition switch ON, and check that the warning light turns on.

    If the warning light does not turn on, inspect the bulb.

    Fig 30: Inspecting Washer Level Warning Light
    G02647092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. INSPECT WASHER LEVEL SWITCH CONTINUITY 
    1. Check that there is no continuity between the terminals with the switch OFF (float).
    2. Check that there is continuity between the terminals with the switch ON (sink).

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

    Fig 31: Inspecting Washer Level Switch Continuity
    G02647093Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  23. INSPECT DRIVER'S SEAT BELT WARNING LIGHT 
    1. Disconnect connector B from the combination meter.
    2. Connect the negative (-) lead from the battery to terminal 9.
    3. 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.

    Fig 32: Inspecting Driver's Seat Belt Warning Light
    G02647094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. Except regular cab (w/o Power seat (Driver side): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    1. Check that continuity exists between terminals 3 and 13 of the switch connector with the switch ON (belt fastened).
    2. Check that no continuity exists between terminals 3 and 13 on the switch side connector with the switch OFF (belt unfastened).

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

    Fig 33: Inspecting Buckle Switch Continuity (Except Regular Cab (W/O Power Seat - Driver Side))
    G02647095Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  25. Except regular cab (w/ Power seat (Driver side): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    1. Check that continuity exists between terminals 2 and 3 on the switch side connector with the switch ON (belt fastened).
    2. Check that no continuity exists between terminals 2 and 3 on the switch side connector with the switch OFF (belt unfastened).

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

    Fig 34: Inspecting Buckle Switch Continuity (Except Regular Cab (W/Power Seat - Driver Side))
    G02647096Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  26. Regular cab (Driver side): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    1. Check that continuity exists between terminals 1 and 2 of the switch connector with the switch ON (belt fastened).
    2. Check that no continuity exists between terminals 1 and 2 on the switch side connector with the switch OFF (belt unfastened).

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

    Fig 35: Inspecting Buckle Switch Continuity (Regular Cab (Driver Side))
    G02647097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. Except regular cab (60:40 separate seat type (Passenger side)): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    1. Check that continuity exists between terminals 1 and 4 on the switch connector with the switch ON (belt fastened).
    2. Check that no continuity exists between terminals 1, 3 and 4 on the switch side connector with the switch OFF (belt unfastened).

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

    Fig 36: Inspecting Buckle Switch Continuity (Except Regular Cab (60:40 Separate Seat Type - Passenger Side)
    G02647098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  28. Regular cab (Passenger side): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    1. Check that continuity exists between terminals 1 and 3 on the switch connector with the switch ON (belt fastened).
    2. Check that no continuity exists between terminals 1, 3 and 4 on the switch side connector with the switch OFF (belt unfastened).

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

    Fig 37: Inspecting Buckle Switch Continuity Regular Cab (Passenger Side)
    G02647099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  29. Except regular cab (Except 60:40 separate seat type (Passenger side)): 

    INSPECT BUCKLE SWITCH CONTINUITY 

    The seat belt buckle switch cannot be inspected independently because it is a hall effect switch.

  30. INSPECT LIGHT CONTROL RHEOSTAT OPERATION 
    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.
    3. Turn the rheostat knob fully counterclockwise, and check that the test bulb turns off.
    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.

    Fig 38: Inspecting Light Control Rheostat Operation
    G02647100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. INSPECT OPEN DOOR WARNING LIGHT 
    1. Disconnect the connector from the door courtesy switch and ground terminal on the wire harness side.
    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.

    Fig 39: Inspecting Open Door Warning Light
    G02647101Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  32. Double cab (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 continuity is not as specified, replace the sensor.

    Fig 40: Inspecting Seat Belt Warning Occupant Detection Sensor Continuity (Double Cab - Passenger's Seat Only)
    G02647102Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  33. Except double cab (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 continuity is not as specified, replace the sensor.

    Fig 41: Inspecting Seat Belt Warning Occupant Detection Sensor Continuity (Except Double Cab - Passenger's Seat Only)
    G02647103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  34. INSPECT PASSENGER SEAT BELT WARNING LIGHT 
    1. Remove the center cluster finish panel.
    2. Disconnect the connectors from the center integration.
    3. Connect the positive(+) lead the battery to the terminal 11 and negative (-) lead terminal 10, and check that the warning light lights up.

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

    Fig 42: Inspecting Passenger Seat Belt Warning Light
    G02647104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  35. MAINTENANCE LIQUID RESETTING PROCEDURE 
    1. Set the display window to ODO.
    2. Turn the ignition switch off.
    3. Pressing the reset switch, turn the ignition switch to the ON position (keep pressing for at least 5 seconds.)
    4. Reset procedure is completed.

    HINT:

    • If the ignition switch is turned off during the reset procedure.
      • LCD: off
      • IND: off
    • If the reset switch is pressed off during the reset procedure.
      • LCD: return to ODO
      • IND: Keep the previous state of reset
    INDICATOR CONDITION DESCRIPTION

    State Condition Specified State
    Blinking The vehicle runs 4,500 miles after the previous setting The indicator blinks for 12 seconds after the ignition switch is on (after 3 seconds for a bulb check).
    Continuously illuminated The vehicle runs 5,000 miles after the previous setting The indicator is continuously illuminated after the ignition switch is on.
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