DTC B1474-96: A/C Inverter Component Internal Failure [08/2023 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

If abnormal current in the A/C inverter output high voltage output circuit or a malfunction of temperature sensor in the compressor with motor assembly is detected, compressor control will be stopped and this DTC will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	DTC Output from	Priority	Note
B1474-96	A/C Inverter Component Internal Failure	Diagnosis Condition: Ignition switch ON Malfunction: Compressor with motor assembly internal malfunction (A/C inverter output system current detection circuit or overheat detection system thermistor) Detection Time: -	Compressor with motor assembly	Does not come on	Memorized	Air Conditioner	A	-

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

DTC Output from

Priority

Note

B1474-96

A/C Inverter Component Internal Failure

Diagnosis Condition:

Ignition switch ON

Malfunction:

Compressor with motor assembly internal malfunction (A/C inverter output system current detection circuit or overheat detection system thermistor)

Detection Time:

Compressor with motor assembly

Does not come on

Memorized

Air Conditioner

DTC DETECTION CONDITION COMBINATION TABLE

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	Ignition switch ON	◦	◦
Malfunction	Compressor with motor assembly internal malfunction (A/C inverter output system current detection circuit)	◦	-
Malfunction	Compressor with motor assembly internal malfunction (A/C inverter overheat detection system thermistor)	-	◦
Detection Time		-	-
Trip Count		1 trip	1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored.