Charging Starts Immediately Despite Charge Schedule Setting [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT (HEALTH CHECK)

Enter the following menus: Health Check.

Check DTCs.

Result

Result	Proceed to
No DTCs are output	A
DTCs are output	B

Turn the ignition switch off.

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ]

Result:

See step 2

CHECK FOR VEHICLE CONTROL HISTORY (ROB)

Check for Vehicle Control History (RoB).

Powertrain > Plug-in Control > Utility

Tester Display
Vehicle Control History (RoB)

Powertrain > Hybrid Control > Utility

Tester Display
Vehicle Control History (RoB)

Result

Result	Proceed to
Vehicle Control History (RoB) not stored	A
Vehicle Control History (RoB) stored	B

Turn the ignition switch off.

Result:

GO TO VEHICLE CONTROL HISTORY (ROB)

PLUG-IN CHARGE CONTROL SYSTEM
Refer to VEHICLE CONTROL HISTORY (RoB) [12/2023 - ]
HYBRID CONTROL SYSTEM
Refer to VEHICLE CONTROL HISTORY (RoB) [12/2023 - ]

Result:

See step 3

SIMULATION TEST (SETTING CHARGE SCHEDULE)

NOTE:

Make sure to use a known good AC power source.
Use the same power voltage that the customer used to plug-in charge the vehicle.

HINT:

When setting the charge schedule, in order to prevent charging from starting immediately, make sure to pay attention to the following:

When setting a charging start time, make sure to set it for least 5 minutes from the current time.
When using the departure time setting, if a full charging cannot be completed by the scheduled departure time, charging will start immediately. Also, when the scheduled departure time is reached, if full charging has not been completed, charging will continue. During reproduction testing, to allow for the time necessary to obtain a full charge, be sure to set a departure time that is sufficiently far into the future when compared to the current time.

Setting the date (year/month/day) and time:

The current date and time displayed on the radio and display receiver assembly is automatically set using GPS. However, if automatic setting of the date and time is set to off in the radio and display receiver assembly settings, the date and time must be set manually.

Timer charging operates in accordance with the set date (year/month/day) and time of the radio and display receiver assembly.

Enter the following menus: Health Check.
Clear DTCs.

Enter the following menus: Powertrain / Plug-in Control / Utility / Vehicle Control History (RoB).

Powertrain > Plug-in Control > Utility

Tester Display
Vehicle Control History (RoB)

Clear all Vehicle Control History (RoB) items.

Enter the following menus: Powertrain / Hybrid Control / Utility / Vehicle Control History (RoB).

Powertrain > Hybrid Control > Utility

Tester Display
Vehicle Control History (RoB)

Clear all Vehicle Control History (RoB) items.

According to the display on the GTS, read the Data List and confirm that the SOC of the HV battery is less than 70%.

HINT:

If the SOC of the HV battery is 70% or more, drive the vehicle in EV mode to discharge the HV battery until the SOC becomes less than 70%.

Powertrain > Hybrid Control > Data List

Tester Display
Hybrid/EV Battery SOC

Check that the date and time displayed on the radio and display receiver assembly are correct and adjust them if necessary.
HINT:

As timer charging is performed based on the time, year, month and day of the radio and display receiver assembly, make sure that they are set correctly.
Using the radio and display receiver assembly, set the charge schedule.
Turn the ignition switch off.
Connect the charging cable (electric vehicle charger cable assembly) to the vehicle and charge the HV battery using the timer charging.
Turn the ignition switch to ON.
Enter the following menus: Health Check.
Check DTCs.

Check for Vehicle Control History (RoB).

Powertrain > Plug-in Control > Utility

Tester Display
Vehicle Control History (RoB)

Powertrain > Hybrid Control > Utility

Tester Display
Vehicle Control History (RoB)

Result

Result	Proceed to
DTCs output	A
No DTCs output, Vehicle Control History (RoB) stored	B
Other than above	C

Turn the ignition switch off.
Disconnect the charging cable (electric vehicle charger cable assembly).

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ]

Result:

GO TO VEHICLE CONTROL HISTORY (ROB)

PLUG-IN CHARGE CONTROL SYSTEM
Refer to VEHICLE CONTROL HISTORY (RoB) [12/2023 - ]
HYBRID CONTROL SYSTEM
Refer to VEHICLE CONTROL HISTORY (RoB) [12/2023 - ]

Result:

CAUSE ANALYSIS (USER / ENVIRONMENT RELATED CAUSE)

Perform cause analysis in the order of "User" and "Environment" categories as specified in the following tables.

USER RELATED CAUSE

Possible Cause	Action to be Taken
Incorrect time, year, month or day set on multi-information display	Explain to the customer that the charge schedule operates according to the time and date (day of week) set in the vehicle. Explain to the customer that as the time and date are set using the GPS function of the radio and display receiver assembly. Therefore, turn the GPS ON.
Charge schedule setting was wrong	Interview customer and provide instruction on usage. Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ] (Refer to Owner's Manual.)
Charge Now was set to ON	Explain to the customer that the Charge Now should be set to OFF when setting the charge schedule.
Charge schedule was set to OFF	Explain to the customer that the charge schedule should be set to ON.
Charge schedule was set to Departure and set departure time was too close to current time	Explain to the customer that if the set departure time is too close to the current time, charging will start immediately.
Charging connector was disconnected and reconnected while charging indicator (EV charger lid indicator) was blinking (normal: 1 second interval)	Explain to the customer that if the charging connector is disconnected and then connected while the charging indicator (EV charger lid indicator) is blinking (normal: 1 second interval), the charge schedule will be canceled.
"My Room Mode" or Remote air conditioning system was operated	Explain to the customer that if the "My Room Mode" or remote air conditioning system is operated, the charge schedule will be canceled and charging will start immediately. Explain to the customer that to activate the charge schedule after the "My Room Mode" or remote air conditioning system is operated, stop the remote air conditioning system and disconnect and connect the charging connector.

ENVIRONMENT RELATED CAUSE

Possible Cause	Action to be Taken
Ambient temperature or HV battery temperature was low	Explain to the customer that due to the operation of the HV battery heater, the charging indicator (EV charger lid indicator) may be illuminated (charging not started). Applicable only if a departure time has been set using the charge schedule.
Charge control power drops due to abnormal electrical outlet voltage	Interview customer and check the electrical outlet. Refer to PROBLEM SYMPTOMS TABLE [12/2023 - ] An abnormality in the voltage of the electrical outlet or the ground wire connection may cause the electric vehicle charger cable assembly to restrict the charging current and thus cause charging time to increase. In this situation, the electrical outlet should be checked by a qualified electrician.
Estimated time until charging complete is excessively long	Explain to the customer that if the estimated time until the completion of charging as shown on the multi-information display is long, charging may start immediately regardless of the departure time setting.

Take appropriate action in accordance with the result of the cause analysis.