B1471

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1471/71: A/C Inverter High Voltage Power Resource System Malfunction
B1471/71 - A/C Inverter High Voltage Power Resource System Malfunction

DESCRIPTION

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 a history DTC. Compressor control may not resume unless the power switch is turned off.





WIRING DIAGRAM





INSPECTION PROCEDURE

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.
NOTICE:
The hybrid control system and air conditioning system output DTCs separately. Inspect DTCs following procedure for the hybrid control system first if any DTCs from those systems are output simultaneously.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System
A -- Continue to next step.

2. CHECK DIAGNOSTIC TROUBLE CODE (HYBRID CONTROL SYSTEM)

(a) Check if DTCs for the hybrid control system are output using the Techstream.

OK:

Hybrid control system DTCs are not output.

NG -- GO TO HYBRID CONTROL SYSTEM Hybrid Control System
OK -- Continue to next step.

3. INSPECT ELECTRIC VEHICLE FUSE

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off.

(b) Remove the service plug grip.

CAUTION:
Do not touch the high-voltage connectors or terminals for 10 minutes after the service plug grip is removed.

NOTICE:
Do not start the engine with the service plug grip removed because it may cause a malfunction.

(c) Remove the inverter terminal cover.

NOTICE:
Be sure to prevent foreign objects or water from entering the inverter with converter assembly.

(d) Check that bolts A and B are tightened securely.





(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE ELECTRIC VEHICLE FUSE Removal
OK -- Continue to next step.

4. INSPECT NO. 2 ENGINE WIRE

CAUTION:
Be sure to wear insulated gloves.

(a) Disconnect the connector from the No. 2 engine wire.





(b) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





Text in Illustration





NG -- REPLACE NO. 2 ENGINE WIRE Disassembly

OK -- REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Removal