Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check the operation of the relay while operating it using the Techstream.

   OK: Operating noise can be heard from the relay. 

NG: Go to step  3

OK: Go to Next Step 

1. Inspect fuel pump resistance (See INSPECTION ).

NG: REPLACE FUEL PUMP  (See INSTALLATION )

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE )

NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT COMPONENTS 

OK: Go to Next Step 

1. Remove the IGCT No. 3 fuse from the engine room relay block.
   Fig 1: Identifying IGCT No. 3 Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance in the IGCT No. 3 fuse.

   Standard resistance: Below 1 Ω 

3. Reinstall the fuse.

NG: REPLACE FUSE (IGCT NO. 3 FUSE) 

OK: Go to Next Step 

1. Inspect the C/OPN relay (See REMOVAL ).

NG: REPLACE ENGINE ROOM JUNCTION BLOCK ASSEMBLY 

OK: Go to Next Step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

NG: REPLACE HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - C/OPN RELAY) 

Fig 2: Identifying Hybrid Vehicle Control ECU (FC Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE HYBRID VEHICLE CONTROL ECU  (See REMOVAL )