Fuel Injector Circuit [10/2015 - ]: Procedure

1. Disconnect The Fuel Injector Assembly Connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn The Power Switch On (Ig).
3. Measure The Voltage According To The Value(S) In The Table Below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   B52-1 - Body Ground	Power Switch On (Ig)	11 To 14 V
   B14-1 - Body Ground	Power Switch On (Ig)	11 To 14 V
   Z1-1 - Body Ground	Power Switch On (Ig)	11 To 14 V
   Z2-1 - Body Ground	Power 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. Check The Fuel Injector Assembly Injection And Volume (Refer to Inspection [10/2014 - ] ).

   Hint: 

   Perform "Inspection After Repair" After Replacing The Fuel Injector Assembly (Refer to Initialization [10/2014 - ] ).

Result: 

Ng 

Replace Fuel Injector Assembly 

(Refer to Removal [10/2014 - ] )

Result: 

Ok 

See Step  3

1. Disconnect The ECM Connector.
2. Disconnect The Fuel Injector Assembly Connectors.
3. Measure The Resistance According To The Value(S) In The Table Below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B52-2 - B51-20 (#10)	Always	Below 1 Ω
   B14-2 - B51-17 (#20)	Always	Below 1 Ω
   Z1-2 - B51-18 (#30)	Always	Below 1 Ω
   Z2-2 - B51-19 (#40)	Always	Below 1 Ω
   B52-2 Or B51-20 (#10) - Body Ground	Always	10 KΩ Or Higher
   B14-2 Or B51-17 (#20) - Body Ground	Always	10 KΩ Or Higher
   Z1-2 Or B51-18 (#30) - Body Ground	Always	10 KΩ Or Higher
   Z2-2 Or B51-19 (#40) - Body Ground	Always	10 KΩ Or Higher

Result: 

Ok 

Proceed To Next Suspected Area Shown In Problem Symptoms Table 

(Refer to Problem Symptoms Table [10/2014 - ] )

Result: 

Ng 

Repair Or Replace Harness Or Connector 

1. Disconnect The Fuel Injector Assembly Connectors.
2. Remove The No. 1 Integration 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
   B52-1 - 1A-3	Always	Below 1 Ω
   B14-1 - 1A-3	Always	Below 1 Ω
   Z1-1 - 1A-3	Always	Below 1 Ω
   Z2-1 - 1A-3	Always	Below 1 Ω
   B52-1 Or 1A-3 - Body Ground	Always	10 KΩ Or Higher
   B14-1 Or 1A-3 - Body Ground	Always	10 KΩ Or Higher
   Z1-1 Or 1A-3 - Body Ground	Always	10 KΩ Or Higher
   Z2-1 Or 1A-3 - Body Ground	Always	10 KΩ Or Higher

Result: 

Ok 

Check ECM Power Source Circuit 

(Refer to ECM Power Source Circuit [10/2015 - ] )

Result: 

Ng 

Repair Or Replace Harness Or Connector