P3232

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3232-749: Open or Short to B+ in Blocking of HV Gate Connection
P3232-749 - Open or Short to B+ in Blocking of HV Gate Connection

DESCRIPTION

The hybrid vehicle control ECU sends a shutdown signal to the inverter with converter assembly (MG ECU) to shut down the power supply to MG2.





WIRING DIAGRAM





INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- When attempting to reproduce the problem, turning the power switch on (IG) and off repeatedly makes it easier to reproduce the problem. Do not repeat the operations of turning the power switch on (READY) and turning the power switch off as these will activate system main relay overheat protection.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - INVERTER WITH CONVERTER ASSEMBLY)

CAUTION:
Be sure to wear insulated gloves.

(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.





NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Disconnect connector A54 from the hybrid vehicle control ECU.

(c) Disconnect connector A60 from the inverter with converter assembly.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK INVERTER WITH CONVERTER ASSEMBLY

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





Standard resistance:





NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components