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

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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 ignition 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 ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect connector A64 from the inverter with converter assembly.
3. Remove the IGCT MAIN relay from the engine room relay block No. 2.
4. Measure the resistance according to the value(s) in the table below.
   Fig 1: Checking Harness And Connector (Inverter With Converter Assembly - IGCT Main Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Component without IGCT MAIN relay connected (Engine Room Relay Block No. 2)
   *b	Front view of wire harness connector (to Inverter with Converter Assembly)

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A64-30 (+B) - 3 (IGCT main Relay)	Ignition switch off	Below 1 Ω
   A64-31 (+B2) - 3 (IGCT main Relay)	Ignition switch off	Below 1 Ω
   A64-10 (GND1) - Body ground	Ignition switch off	Below 1 Ω
   A64-11 (GND2) - Body ground	Ignition switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A64-30 (+B) or A64-31 (+B2) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

5. Install the IGCT MAIN relay.
6. Connect the hybrid vehicle control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4