B1471

DTC B1471/71 A/C Inverter High Voltage Power Resource System Malfunction

DESCRIPTION

DTC Detection Condition:

The A/C inverter assembly monitors power voltage from the main battery in the 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.

CAUTION:
- Wear electrically insulated gloves and pull out the service plug grip before inspection as procedures may require disconnecting high-voltage connectors. Be sure to carry the removed service plug grip because other workers may install it by mistake.
- Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

NOTE:
- The hybrid control system and air conditioning system output DTCs separately. If these systems output DTCs simultaneously, inspect the DTCs of the hybrid control system first by following the flowchart.
- This circuit uses both CAN and multiplex communication. Before performing the inspection, check that the CAN and multiplex communication systems are functioning normally.

Wiring Diagram:

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE