P3110-527

P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3110-223: IGCT Relay Malfunction

DTC P3110-223 - IGCT Relay Malfunction

DTC P3110-527 - HV Main Relay Malfunction

DESCRIPTION

The HV control ECU monitors the IGCT relay and IG2 relay to detect malfunction.






WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If there is a battery voltage at the +B, MREL or IGSW terminal of the HV control ECU even though the power switch is turned OFF, the circuit is shorted to the +B power supply.

PROCEDURE

1. INSPECT INTEGRATION RELAY (IGCT RELAY AND IG2 RELAY)




(a) Remove the integration relay from the engine room relay block.
(b) Inspect the IGCT relay.
(1) Measure the resistance between the terminals of the integration relay.
Standard resistance:





(c) Inspect the IG2 relay.
(1) Measure the resistance between the terminals of the integration relay.
Standard resistance:






NG -- REPLACE INTEGRATION RELAY (IGCT RELAY OR IG2 RELAY)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (HV CONTROL ECU - INTEGRATION RELAY)