DTC P324E-788: MG-ECU Power Relay Intermittent Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P324E-788 only is output.	A
   U0110-159, 160, 656, 657 are also output.	B

5. Turn the power switch off.

B → See step   5 

A: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check that the service plug grip is not installed.
   NOTE:

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

2. Disconnect connector A59 from the inverter with converter assembly.
3. Remove the IGCT relay from the engine room relay block and junction block assembly.
4. Measure the resistance according to the value(s) in the table below.
   Fig 1: Checking Resistance In Harness And Connector (Inverter With Converter Assembly - IGCT Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block and Junction Block Assembly	*2	IGCT Relay
   *a	Front view of wire harness connector (to Inverter with Converter Assembly)	-	-

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A59-10 (+B) - 5 (IGCT relay)	Power switch off	Below 1 Ω
   A59-9 (+B2) - 5 (IGCT relay)	Power switch off	Below 1 Ω
   A59-28 (GND1) - Body ground	Power switch off	Below 1 Ω
   A59-27 (GND2) - Body ground	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A59-10 (+B) or A59-9 (+B2) - Body ground and other terminals	Power switch off	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4