Fuel Injector Circuit [12/2012 - 08/2017]: Procedure

1. Disconnect the fuel injector assembly connectors.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

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
   B19-1 - Body ground	Ignition switch ON	11 to 14 V
   B17-1 - Body ground	Ignition switch ON	11 to 14 V
   B15-1 - Body ground	Ignition switch ON	11 to 14 V
   B13-1 - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  2

1. Check the fuel injector assembly injection and volume.

   Refer to INSPECTION [12/2012 - ]

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly.

   Refer to INITIALIZATION [12/2012 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FUEL INJECTOR ASSEMBLY. Refer to  REMOVAL [12/2012 - ] 

Result: 

OK 

See step  3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B19-2 - B77-20 (#10)	Always	Below 1 Ω
   B17-2 - B77-17 (#20)	Always	Below 1 Ω
   B15-2 - B77-18 (#30)	Always	Below 1 Ω
   B13-2 - B77-19 (#40)	Always	Below 1 Ω
   B19-2 or B77-20 (#10) - Body ground	Always	10 kΩ or higher
   B17-2 or B77-17 (#20) - Body ground	Always	10 kΩ or higher
   B15-2 or B77-18 (#30) - Body ground	Always	10 kΩ or higher
   B13-2 or B77-19 (#40) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2012 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the fuel injector assembly connector.
2. Remove the IG2 relay from the engine room relay block and junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B19-1 - IG2 relay terminal 5	Always	Below 1 Ω
   B17-1 - IG2 relay terminal 5	Always	Below 1 Ω
   B15-1 - IG2 relay terminal 5	Always	Below 1 Ω
   B13-1 - IG2 relay terminal 5	Always	Below 1 Ω
   B19-1, B17-1, B15-1, B13-1 or IG2 relay terminal 5 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

CHECK ECM POWER SOURCE CIRCUIT. Refer to  ECM Power Source Circuit [12/2012 - ]  

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR