DTC P3110-223: IGCT Relay Malfunction: Procedure

1. Remove the IGCT relay from the engine room relay block and junction block assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Inspecting Relay (IGCT)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	IGCT Relay

3. Install the IGCT relay.

NG → REPLACE RELAY (IGCT) 

OK: Go to next step 

1. Remove the IGCT relay from the engine room relay block and junction block assembly.
2. Disconnect connector A21 and A22 from the power management control ECU.
3. Measure the voltage according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Power Management Control ECU - IGCT Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block and Junction Block Assembly	*2	IGCT relay
   *a	Rear view of wire harness connector (to Power Management Control ECU)	-	-

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A22-5 (+B1), A21-2 (+B2) or 5 (IGCT relay) - Body ground	Power switch off	Below 1 V

4. Install the IGCT relay.
5. Connect the power management control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3