Fuel Injector Circuit: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel injector 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)

NG → See step   4 

OK: Go to next step 

1. Inspect the fuel injector assembly. Refer to INSPECTION [06/2012 - ] - Step 1 .

NG → See step   5 

OK: Go to next step 

1. Disconnect the fuel injector 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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7 

1. Inspect the No. 1 integration relay (IG2). Refer to ON-VEHICLE INSPECTION [06/2012 - ] - Step 2 .

NG → See step   6 

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