P3232

HYBRID / BATTERY 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 for 10 minutes, check the voltage at the terminals in 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 repeatedly turn the power switch on (READY) and off as this will activate a 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) Check that the service plug grip is not installed.

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 A58 from the hybrid vehicle control ECU connector.

(c) Disconnect the low voltage connector A59 from the inverter with converter assembly connector.

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





Standard Resistance:





Text in Illustration





(e) Connect the hybrid vehicle control ECU connector.

(f) Connect the inverter with converter assembly.

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

2. CHECK INVERTER WITH CONVERTER ASSEMBLY

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

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 the low voltage connector A59 from the inverter with converter assembly connector.

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





Standard Resistance:





Text in Illustration





(d) Connect the inverter with converter assembly connector.

NG -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components