DTC P1CE6-11: AC Inverter Status Signal Circuit Short to Ground; DTC P1CE6-15: AC Inverter Status Signal Circuit Short to Auxiliary Battery or Open [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 ELECTRIC VEHICLE CHARGER ASSEMBLY (CHECK VOLTAGE)

WARNING:

Be sure to wear insulated gloves.

Pre-procedure1

Check that the service plug grip is not installed.
NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the service information because this may cause a malfunction.
Disconnect the I33 voltage inverter connector.
NOTE:
If the I33 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the ignition switch to ON.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Voltage Inverter)

Standard Voltage

Tester Connection	Condition	Specified Condition	Result
I33-1 (VAIN) - Body ground	Ignition switch ON	4.5 to 5.5 V	V

NOTE:

If the ignition switch is turned to ON with the voltage inverter assembly connector disconnected, other DTCs will be stored. Therefore, clear the DTCs after checking.

Result

Proceed to
OK
NG

Post-procedure1

Turn the ignition switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal.
Reconnect the voltage inverter connector.

Result:

REPLACE VOLTAGE INVERTER. Refer to REMOVAL [12/2023 - ]

Result:

See step 2

CHECK HARNESS AND CONNECTOR (CHARGER COOLING BLOWER - ELECTRIC VEHICLE CHARGER ASSEMBLY)

WARNING:

Be sure to wear insulated gloves.

Pre-procedure1

Check that the service plug grip is not installed.
NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the service information because this may cause a malfunction.
Disconnect the I33 voltage inverter connector.
NOTE:
If the I33 connector is disconnected with the auxiliary battery connected, P1CE6-15 may be detected. Therefore, check that the cable is disconnected from the negative (-) auxiliary battery terminal before starting the operation.
Disconnect the J84 electric vehicle charger assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I33-1 (VAIN) - J84-56 (VAIN)	Ignition switch off	Below 1 Ω	Ω
I33-1 (VAIN) and J84-56 (VAIN) - Body ground and other terminals	Ignition switch off	10 kΩ or higher	kΩ

Result

Proceed to
OK
NG

Post-procedure1

Reconnect the electric vehicle charger assembly connector.
Reconnect the voltage inverter connector.

Result:

REPLACE ELECTRIC VEHICLE CHARGER ASSEMBLY. Refer to REMOVAL [12/2023 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR