Toyota Avalon (XX50): Wireless Charging System(for Gasoline Model)

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the wireless charging system.

PROCEDURE

NEXT

HINT:

• In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for problem analysis:

  What	Vehicle model, system name
  When	Date, time, occurrence frequency
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

NEXT

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

(a) Refer to Problem Symptoms Table.

Click here

B

GO TO STEP 6

A

(a) Operation Check.

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(b) Terminals of ECU.

Click here

NEXT

NEXT

NEXT

END

Operation Check

OPERATION CHECK

WIRELESS CHARGING SYSTEM OPERATION CHECK

(a) Turn the engine switch on (IG or ACC).

HINT:

If the engine switch is turned off when the wireless charging system is on, the wireless charging system will automatically turn on the next time the engine switch is turned on (IG or ACC).

(b) Turn the wireless charging system on and check that the indicator light (green) illuminates.

(c) Place a rechargeable device on the charging area and check that the indicator light (amber) illuminates, indicating charging is in progress.

HINT:

Refer to Precaution for details about Qi-compatible rechargeable devices.

Click here

(d) Check that the indicator light (green) illuminates when charging is complete.

HINT:

Some mobile devices, cases or accessories may not cause the indicator (green) to illuminate when charging is complete, even though they are Qi-compatible. Check the mobile device to confirm the charge status.

(e) Turn the wireless charging system off and check that the indicator light turns off.

Parts Location

PARTS LOCATION

ILLUSTRATION

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

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

PRECAUTION FOR WHEN USING WIRELESS CHARGER

(a) When charging a rechargeable device while driving, for safety reasons, the driver should not operate the rechargeable device.

(b) People with implantable cardiac pacemakers, cardiac resynchronization therapy pacemakers or implantable cardioverter defibrillators, or any other electrical medical device, should consult their physician about usage of the wireless charging system. Operation of the wireless charging system may have an affect on medical devices.

(c) Observe the following precautions. Failure to do so may result in a fire, equipment failure or damage, or burns due to over heating.

• Do not put any metallic objects between the charging area and the rechargeable device while charging.
• Do not attach metallic objects, such as aluminum stickers, to the charging area.
• Do not cover the rechargeable device with a cloth or other object while charging.
• Do not attempt to charge rechargeable devices which are not compatible with the Qi wireless charging standard.
• Do not disassemble, modify or remove the mobile wireless charger cradle assembly.
• Do not apply force or impact to the mobile wireless charger cradle assembly.

(d) In the following situations, the wireless charging system may not operate correctly:

• When the rechargeable device is fully charged.
• When there is an foreign object between the charging area and rechargeable device.
• When a non-Qi-compatible cover or accessory is attached to the Qi-compatible rechargeable device.
• When the rechargeable device becomes hot while charging.
• When a rechargeable device is placed on the charging area with its charging surface facing up.
• When a rechargeable device is not centered on the charging area.
• When the vehicle is in an environment where it may be affected by strong radio waves or electrical noise.
• When the rechargeable device is in contact with, or is covered by any metallic object.
• When wireless keys (that emit radio waves) other than those of the vehicle are being used nearby.

(e) Do not bring magnetic cards, such as credit cards, or magnetic recording media close to the mobile wireless charger cradle assembly while charging. Otherwise, data may be erased. Additionally, do not bring precision instruments, such as wrist watches, close to the mobile wireless charger cradle assembly, as such objects may malfunction.

(f) To prevent the battery from discharging, do not use the wireless charging system for a long period of time with the engine stopped.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

• Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
• Inspect the fuses and relays related to this system before inspecting the suspected areas below.

• *: For details about the indicator blinking patterns, refer to System Description.

  Click here

Status Signal Circuit

DESCRIPTION

This circuit sends a charging suspension signal from the certification ECU (smart key ECU assembly) to the mobile wireless charger cradle assembly. Based on this signal, the mobile wireless charger cradle assembly suspends or resumes wireless charging.

HINT:

The wireless charging system uses the same radio wave frequency that is used to perform verification of the electrical key transmitter sub-assembly. Therefore, when the electrical key transmitter sub-assembly verification is being performed, the certification ECU (smart key ECU assembly) sends a charging suspension signal to the wireless charging system to suspend charging.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

Click here

PROCEDURE

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

• *1: When the engine switch is turned from off to on (ACC), the mobile wireless charger cradle assembly monitors the charging suspension signal for 5 seconds. If the charging suspension signal is not 4 V or more for 0.8 seconds or more during monitoring, the mobile wireless charger cradle assembly determines that there is an open in the charging suspension signal line, blinks (pattern 1) the indicator light (amber), and prohibits operation until the engine switch is turned from off to on (ACC) again.
• *2: For details about conditions when the certification ECU (smart key ECU assembly) sends the charging suspension signal, refer to System Description.

  Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

(a) Disconnect the K10 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the G12 mobile wireless charger cradle assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

System Description

SYSTEM DESCRIPTION

WIRELESS CHARGER FUNCTION OUTLINE

(a) The wireless charging system enables Qi-compatible* rechargeable devices, such as a cellular phone, to be recharged by merely placing it on the charging area of the mobile wireless charger cradle assembly.

HINT:

*: Qi (pronounced chee) is a wireless technology which allows devices to recharge without using any wires.

(b) Qi-compatible devices which do not fit within the charging area cannot be used. If a Qi-compatible device does not operate normally, refer to the owner's manual of the device.

(c) Qi-compatible rechargeable devices can be charged.

HINT:

• "Qi" and "Qi" logo are trademarks of the Wireless Power Consortium (WPC).
• Although the wireless charging system meets Qi standards, compatibility with all Qi-compatible devices is not guaranteed.

CHARGING INDICATOR STATUS

(a) The indicator light shows the operation condition of the wireless charging system.

• *1: Some mobile devices, cases or accessories may not cause the indicator (green) to illuminate when charging is complete, even though they are Qi-compatible. Check the mobile device to confirm the charge status.
• *2: If the charging suspension signal is received for less than 4.5 seconds, the indicator light (green) will remain illuminated for 4.5 seconds.
• *3: Refer to the following diagram for details about the indicator blinking patterns.

RESUMPTION OF CHARGING

(a) After charging is complete, if the rechargeable device is left in the same position on the charging area, charging will resume after 30 minutes elapse.

(b) Charging will resume if the rechargeable device is moved or repositioned within the charging area, or replaced with another rechargeable device within 30 minutes of charging being completed.

(c) If the rechargeable device is moved while it is being charged, charging will resume when the device is placed on the charging area.

HINT:

If charging is stopped and resumed repeatedly due to the rechargeable device being moved or a communication error between the wireless charging system and rechargeable device, charging will be prohibited after a certain number of times to protect the rechargeable device.

SUSPENSION OF CHARGING DUE TO VERIFICATION OF ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

(a) The wireless charging system uses the same radio wave frequency that is used to perform verification of the electrical key transmitter sub-assembly. Therefore, when the electrical key transmitter sub-assembly verification is being performed, the certification ECU (smart key ECU assembly) sends a charging suspension signal to the wireless charging system to suspend charging.

HINT:

• When charging is suspended due to the charging suspension signal, the indicator (green) will illuminate.
• If there is an open in the charging suspension signal circuit, the indicator (amber) will blink (pattern 1).

(b) The certification ECU (smart key ECU assembly) sends the charging suspension signal when any of the following conditions is met:

• A door is opened and closed.
• The back door opener switch is pressed.
• The back door is closed.
• The engine switch is turned on (START).
• An electrical key transmitter sub-assembly is not detected in the cabin.

CHARGING FREQUENCY SWITCHING FUNCTION

(a) If noise is generated in the AM radio during charging, turn the wireless charging system off and check if the noise is reduced. If the noise is reduced, press and hold the mobile wireless charging switch for approximately 2 seconds to change the charging frequency and reduce the noise.

HINT:

When the charging frequency is being changed, the indicator (amber) blinks (pattern 2).

System Diagram

SYSTEM DIAGRAM

Terminals Of Ecu

TERMINALS OF ECU

CHECK MOBILE WIRELESS CHARGER CRADLE ASSEMBLY

• *1: When the engine switch is turned from off to on (ACC), the mobile wireless charger cradle assembly monitors the charging suspension signal for 5 seconds. If the charging suspension signal is not 4 V or more for 0.8 seconds or more during monitoring, the mobile wireless charger cradle assembly determines that there is an open in the charging suspension signal line, blinks (pattern 1) the indicator light (amber), and prohibits operation until the engine switch is turned from off to on (ACC) again.
• *2: For details about conditions when the certification ECU (smart key ECU assembly) sends the charging suspension signal, refer to System Description.

  Click here

Wireless Charger Illumination Circuit

DESCRIPTION

When the taillight on, this circuit sends an illumination signal to the mobile wireless charger cradle assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

(a) Disconnect the G12 mobile wireless charger cradle assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Disconnect the G16 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Wireless Charger Power Source Circuit

DESCRIPTION

This is the power source circuit for the mobile wireless charger cradle assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

(a) Disconnect the G12 mobile wireless charger cradle assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR