B1471

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1471: A/C Inverter High Voltage Power Resource System Malfunction

DTC B1471 - A/C Inverter High Voltage Power Resource System Malfunction

DESCRIPTION

The A/C inverter monitors the power voltage from the main battery in the self circuit. It stops compressor control and outputs the DTC when the monitored voltage is outside the specified range.
The output DTC is memorized as previous trouble. Compressor control may not resume unless the power switch is turned OFF.
HINT: The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following the flowchart for the hybrid control system first if any DTCs from those systems are output simultaneously.





NOTE: The A/C inverter is integrated with the inverter with converter. It is necessary to replace the PCU box if the A/C inverter (inverter with converter) needs to be replaced because the A/C inverter (inverter with converter) cannot be replaced alone.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DIAGNOSTIC TROUBLE CODE
(a) Check if DTCs for the hybrid control system are output using Techstream.
OK:
DTCs are not output in the hybrid control system.
NG -- GO TO HYBRID CONTROL SYSTEM
OK -- REPLACE A/C INVERTER