Fuel Injector Circuit [08/2015 - 08/2019]: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel injector assembly connector.
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Cylinder	Tester Connection	Switch Condition	Specified Condition
   No. 1	E1-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 2	n1-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 3	E2-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 4	n2-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 5	E3-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 6	n3-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 7	E4-2 - Ground	Engine switch on (IG)	11 to 14 V
   No. 8	n4-2 - Ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Injector Assembly)

Result: 

NG 

See step  4

Result: 

OK 

See step  2

1. Inspect the fuel injector assembly (Refer to PROCEDURE - Step 1 ).

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly (Refer to INITIALIZATION [08/2015 - ] ).

Result: 

NG 

REPLACE FUEL INJECTOR ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  3

1. Disconnect the fuel injector assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Cylinder	Tester Connection	Condition	Specified Condition
   No. 1	E1-1 - Body ground	Always	10 kΩ or higher
   	E1-1 - C31-6 (#10)	Always	Below 1 Ω
   No. 2	n1-1 - Ground	Always	10 kΩ or higher
   	n1-1 - C31-1 (#20)	Always	Below 1 Ω
   No. 3	E2-1 - Ground	Always	10 kΩ or higher
   	E2-1 - C31-7 (#30)	Always	Below 1 Ω
   No. 4	n2-1 - Ground	Always	10 kΩ or higher
   	n2-1 - C31-2 (#40)	Always	Below 1 Ω
   No. 5	E3-1 - Ground	Always	10 kΩ or higher
   	E3-1 - C31-8 (#50)	Always	Below 1 Ω
   No. 6	n3-1 - Ground	Always	10 kΩ or higher
   	n3-1 - C31-3 (#60)	Always	Below 1 Ω
   No. 7	E4-1 - Ground	Always	10 kΩ or higher
   	E4-1 - C31-9 (#70)	Always	Below 1 Ω
   No. 8	n4-1 - Ground	Always	10 kΩ or higher
   	n4-1 - C31-4 (#80)	Always	Below 1 Ω

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Inspect the No. 1 integration relay (IG2) (Refer to PROCEDURE - Step 2 ).

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - FUEL INJECTOR ASSEMBLY) 

Result: 

NG 

REPLACE NO. 1 INTEGRATION RELAY 

(Refer to PROCEDURE - Step 2 )