METER / GAUGE SYSTEM PRECAUTION


  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

    Note

    When disconnecting the cable from the negative (-) battery terminal, initialize the following system after the cable is reconnected.

    System Name See Procedure
    Parking Assist Monitor System

    Click here

    Power Door Lock Control System
    Air Conditioning System (for Automatic Air Conditioning System)
    Air Conditioning System (for Manual Air Conditioning System)
    Power Back Door System

  2. IGNITION SWITCH EXPRESSIONS

    The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

    Expression Ignition Switch (Position) Engine Switch (Condition)
    Ignition Switch off LOCK Off (Lock)
    Ignition Switch ACC ACC On (ACC)
    Ignition Switch ON ON On (IG)
    Engine Start START On (Start)

  3. PRECAUTIONS FOR INSPECTING POWER SOURCE FOR MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (for LHD)


    1. As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), a door control battery malfunction can be suspected if the power source for the main body ECU (multiplex network body ECU) is malfunctioning.

  4. FUEL RECEIVER GAUGE OPERATION


    1. OPERATION

      The combination meter assembly uses the fuel sender gauge assembly and the fuel injection volume signal from the ECM to detect the amount of fuel remaining in the fuel tank assembly. The fuel sender gauge assembly has a variable resistor whose resistance changes according to the amount of fuel remaining. The fuel sender gauge assembly receives voltage from the combination meter assembly and changes the voltage based on the resistance that changes according to the amount of fuel remaining in the fuel tank assembly. The combination meter assembly receives a fuel injection volume signal from the ECM and detects the voltage between the variable resistor and the resistor in the combination meter assembly, and operates the fuel receiver gauge.

    2. FUEL RECEIVER GAUGE READING


      1. During normal driving:

        As the fuel level in the fuel tank assembly changes when driving on a hill or applying brakes, the fuel receiver gauge reading is updated according to the fuel injection volume during normal driving. However, as the fuel injection volume measurement has a margin of error, the value is indicated after correction by input values from the fuel sender gauge assembly.

      2. During refueling:

        The fuel level in the fuel tank assembly rises rapidly when fuel is added. If the averaging process that is used during normal driving is used in this case, the fuel receiver gauge reading cannot be updated promptly. Therefore, when it is judged that fuel is being added to the vehicle based on the shift lever position and changes in the fuel level, output values from the fuel sender gauge assembly are immediately reflected in the fuel receiver gauge reading. This control is called refueling judgment.

    3. REFUELING JUDGMENT CONDITIONS

      Note

      Add fuel with the ignition switch off to ensure safety and to enable refueling judgment so that an appropriate fuel receiver gauge reading is obtained. If it is necessary to add fuel with the ignition switch ON, move the shift lever to P or N.


      1. Normal judgment condition (When normal refueling method is used)

        With the ignition switch off, the fuel sender gauge assembly detects a change of 5.0 liters (5.3 US qts, 4.4 lmp. qts) or more in the fuel level.

      2. Other judgment conditions (When other refueling method is used)

        Any of the following conditions is met:


        • With the vehicle and engine stopped and the ignition switch ON, the fuel sender gauge assembly detects a change of 5.0 liters (5.3 US qts, 4.4 lmp. qts) or more in the fuel level.

        • With the vehicle stopped, the engine running, the ignition switch ON and the shift lever in P or N, the fuel sender gauge assembly detects a change of 5.0 liters (5.3 US qts, 4.4 lmp. qts) or more in the fuel level.

        • With the vehicle stopped, the engine running, the ignition switch ON and the shift lever in any driving position, the fuel sender gauge assembly detects a change of 15.0 liters (15.9 US qts, 13.2 Imp. qts) or more in the fuel level.

    4. PRECAUTION FOR REFUELING

      The fuel sender gauge assembly cannot detect changes in fuel level within certain ranges (around points E and F). Therefore, even though 5.0 liters (5.3 US qts, 4.4 Imp. qts) or more of fuel is added, refueling judgment may not be performed and the fuel receiver gauge reading may not change when fuel level is within such ranges.

    5. FORCED RESET OF FUEL RECEIVER GAUGE

      When driving at 20 km/h (12 mph) or more, if the output value from the fuel sender gauge assembly is different from the fuel receiver gauge reading by 15.0 liters (15.9 US qts, 13.2 Imp. qts) or more for approximately 2 minutes, the output value from the fuel sender gauge assembly is immediately reflected in the fuel receiver gauge reading to compensate for a situation when refueling judgment cannot be made.