DTC B1471-1C: A/C Inverter High Voltage Power Resource Circuit Voltage Out of Range [11/2023 - ]: Description

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The hybrid vehicle control ECU monitors the voltage of the HV battery. The hybrid vehicle control ECU stops compressor control and stores this DTC when the monitored voltage is outside the specified range.

This DTC will be stored as a history DTC. Compressor control may not resume unless the ignition switch is turned off.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	DTC Output from	Priority
B1471-1C	A/C Inverter High Voltage Power Resource Circuit Voltage Out of Range	Diagnosis Condition: Ignition switch ON Malfunction: Open or short in A/C inverter high voltage power resource system Damage or malfunction in voltage booster system Detection Time: -	Hybrid control system HV air conditioning wire Compressor with motor assembly	Memorized	Air Conditioner	B

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

DTC Output from

Priority

B1471-1C

A/C Inverter High Voltage Power Resource Circuit Voltage Out of Range

Diagnosis Condition:

Ignition switch ON

Malfunction:

Open or short in A/C inverter high voltage power resource system
Damage or malfunction in voltage booster system

Detection Time:

Hybrid control system
HV air conditioning wire
Compressor with motor assembly

Memorized

Air Conditioner

DTC DETECTION CONDITION COMBINATION TABLE

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	Ignition switch ON	◦	◦	◦
Malfunction	Open in A/C inverter high voltage power resource system	◦	-	-
	Short in A/C inverter high voltage power resource system	-	◦	-
	Voltage booster system damage or malfunction	-	-	◦
Detection Time		-	-	-
Trip Count		1 trip	1 trip	1 trip

HINT:

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