Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Status Signal Circuit

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Power Outlets (int) / Wireless Charging System(for Gasoline Model) / 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.

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PROCEDURE

1.

CHECK MOBILE WIRELESS CHARGER CRADLE ASSEMBLY (DIS TERMINAL)

*a

Component with harness connected

(Mobile Wireless Charger Cradle Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G12-7 (DIS) - Body ground

For 5 seconds after turning engine switch from off to on (ACC)*1

4.5 to 6.0 V

Device being charged

Below 1 V

Charging suspended due to smart key system status*2

4.5 to 6.0 V
  • *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.

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OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - MOBILE WIRELESS CHARGER CRADLE ASSEMBLY)

(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:

Tester Connection

Condition

Specified Condition

K10-7 (WCSW) - G12-7 (DIS)

Always

Below 1 Ω

K10-7 (WCSW) or G12-7 (DIS) - Body ground

Always

10 kΩ or higher
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Problem Symptoms Table

    System Description

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