Fuel Injector Circuit [06/2016 - ]: Procedure

1. Disconnect the fuel injector assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   C8-1 - Body ground	Ignition switch ON	11 to 14 V
   C30-1 - Body ground	Ignition switch ON	11 to 14 V
   C9-1 - Body ground	Ignition switch ON	11 to 14 V
   C31-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Injector Assembly)
   *b	No. 1 cylinder
   *c	No. 2 cylinder
   *d	No. 3 cylinder
   *e	No. 4 cylinder

Result: 

NG 

See step  4

Result: 

OK 

See step  2

1. Check the fuel injector injection and volume (Refer to INSPECTION [06/2016 - ] ).

Result: 

NG 

REPLACE FUEL INJECTOR ASSEMBLY 

(Refer to REMOVAL [06/2016 - ] )

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 (Check for open)

   Tester Connection	Condition	Specified Condition
   C8-2 - A36-12 (#10)	Always	Below 1 Ω
   C30-2 - A36-22 (#20)	Always	Below 1 Ω
   C9-2 - A36-32 (#30)	Always	Below 1 Ω
   C31-2 - A36-13 (#40)	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   C8-2 or A36-12 (#10) - Body ground	Always	10 kΩ or higher
   C30-2 or A36-22 (#20) - Body ground	Always	10 kΩ or higher
   C9-2 or A36-32 (#30) - Body ground	Always	10 kΩ or higher
   C31-2 or A36-13 (#40) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the fuel injector assembly connector.
2. Remove the EFI MAIN1 relay from the engine room relay block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   C8-1 - EFI MAIN1 relay terminal 3	Always	Below 1 Ω
   C30-1 - EFI MAIN1 relay terminal 3	Always	Below 1 Ω
   C9-1 - EFI MAIN1 relay terminal 3	Always	Below 1 Ω
   C31-1 - EFI MAIN1 relay terminal 3	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   C8-1 or EFI MAIN1 relay terminal 3 - Body ground	Always	10 kΩ or higher
   C30-1 or EFI MAIN1 relay terminal 3 - Body ground	Always	10 kΩ or higher
   C9-1 or EFI MAIN1 relay terminal 3 - Body ground	Always	10 kΩ or higher
   C31-1 or EFI MAIN1 relay terminal 3 - Body ground	Always	10 kΩ or higher

Result: 

OK 

CHECK ECM POWER SOURCE CIRCUIT 

(Refer to ECM Power Source Circuit [06/2016 - 03/2017] , or refer to ECM Power Source Circuit [03/2017 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR