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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Charging System - Diagnostic Codes [A25A-FXS]) >> Charging System >> On-Vehicle Inspection [04/2018 - 08/2021] >> Procedure

On-Vehicle Inspection [04/2018 - 08/2021]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK AUXILIARY BATTERY 
    1. Check that the auxiliary battery cables are connected to the correct terminals.

      If they are not, connect them properly.

    2. Check the auxiliary battery for damage and deformation. If severe damage, deformation or leakage is found, replace the auxiliary battery.
  2. CHECK AUXILIARY BATTERY VOLTAGE 
    1. Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.
    2. Measure the auxiliary battery voltage according to the value(s) in the table below.

      Result

      Tester Connection Condition Specified Condition Result
      Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Power switch off 12.0 V or higher Auxiliary battery is OK
      12.0 V or less Recharge auxiliary battery
  3. RECHARGE AUXILIARY BATTERY 
    1. Recharge the auxiliary battery.

      HINT: 

      • Recharge the auxiliary battery according to the charger's instructions.
      • Apply the appropriate charging current according to the type of auxiliary battery shown in the table below.
      Charge Method Charging Current
      Normal Below 5 A
      Quick Below 15 A
    2. Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.
    3. Measure the auxiliary battery voltage according to the value(s) in the table below.

      Result

      Tester Connection Condition Specified Condition Result
      Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Power switch off 12.0 V or higher Auxiliary battery is OK
      12.0 V or less Recharge auxiliary battery
  4. CHECK AUXILIARY BATTERY TERMINAL, FUSIBLE LINK AND FUSE 
    1. Check that the auxiliary battery terminals are not loose or corroded.

      Positive (+) Auxiliary Battery Terminal 

      Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf) 

      Negative (-) Auxiliary Battery Terminal 

      Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf) 

      If a terminal is loose or corroded, tighten or clean the terminal.

    2. Measure the resistance of each fusible link and fuse for the auxiliary battery charging system.

      Standard Resistance

      Below 1 Ω

      If the result is not as specified, replace the fusible link or fuse as necessary.

  5. CHECK AMD TERMINAL 
    WARNING:
    • Orange wire harnesses and connectors indicate high-voltage circuits. To prevent electric shock, always follow the procedure described in the repair service information.

      Refer to PRECAUTION [04/2018 -]

      GTY588409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • To prevent electric shock, wear insulated gloves when working on wire harnesses and components of the high voltage system.
      GTY588386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the service plug grip.

      Refer to REMOVAL [04/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 08/2021]

    2. Check that the AMD terminal is connected securely, and there is no contact problem.

      If there are any arc marks, replace the affected parts.

    3. Check that the nut for the AMD terminal is tightened to the specified torque.
      GTY896510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 AMD Terminal
      (Inverter with Converter Assembly Side)
      *2 AMD Terminal
      (No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side)

      Inverter with Converter Assembly Side 

      Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) 

      No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Side 

      Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) 

      If there are no arc marks and the AMD terminal connection is faulty, connect the AMD terminal securely.

    4. Install the service plug grip.

      Refer to INSTALLATION [04/2018 -]

  6. CHECK DC/DC CONVERTER FUNCTION 
    1. Connect the AC/DC 400 A probe of the tester to the positive (+) auxiliary battery cable.
    2. Install the service plug grip.
    3. Connect the cable to the negative (-) auxiliary battery terminal.
    4. Turn the power switch on (READY) and leave the vehicle as it is until the electric current flowing to the auxiliary battery becomes 10 A or less.

      HINT: 

      If the power switch turns off immediately after it is turned on (READY), auxiliary battery voltage may be low. Recharge the auxiliary battery and perform this procedure again.

    5. Measure the current flowing from the auxiliary battery with the power switch on (READY), the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on.
      GTY434149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Probe Direction
      *b Current Flowing to Auxiliary Battery

      Standard Current

      Item Condition Specified Condition
      Current flowing from auxiliary battery Power switch on (READY)
      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)      		 0 A or less
      (No current from auxiliary battery)
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Item Condition Specified Condition
      Auxiliary battery voltage Power switch on (READY)
      (The headlight position switch and blower motor switch are in the HI position, and the rear window defogger is turned on.)      		 12.5 to 15 V
      GTY430831Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Probe Direction
      *b Current Flowing from Auxiliary Battery
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