DTC B1498: Communication Malfunction (A/C Inverter Local) [10/2018 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.

The hybrid vehicle control ECU and compressor with motor assembly communicate via direct line. Compressor control is stopped and this DTC is stored if communication information is cut off or abnormal information is received.

This DTC is also detected if high-voltage electricity supplied from the inverter with converter assembly to the compressor control circuit is shut off.

This DTC will be stored as a history DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1498	Communication Malfunction (A/C Inverter Local)	Error in communication line between the hybrid vehicle control ECU and compressor with motor assembly Open in communication line between the hybrid vehicle control ECU and compressor with motor assembly High-voltage power source shut off	Harness or connector Hybrid vehicle control ECU Compressor with motor assembly HV air conditioning wire Battery state sensor assembly	Memorized

DTC Detection Conditions

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	Power switch on (READY)	◦	◦	◦
Malfunction Status	Error in communication line between the hybrid vehicle control ECU and compressor with motor assembly	◦	-	-
	Open in communication line between the hybrid vehicle control ECU and compressor with motor assembly	-	◦	-
	High-voltage power source shut off	-	-	◦
Detection Time		-	-	-
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.