Fuel Injector Circuit: Procedure

1. Disconnect the fuel injector assembly connectors.
   Fig 1: Identifying 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
   B11-1 - Body ground	Ignition switch ON	11 to 14 V
   B25-1 - Body ground	Ignition switch ON	11 to 14 V
   B10-1 - Body ground	Ignition switch ON	11 to 14 V
   B21-1 - Body ground	Ignition switch ON	11 to 14 V
   B9-1 - Body ground	Ignition switch ON	11 to 14 V
   B18-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   6 

OK: Go to next step 

Fig 2: Fuel Injector Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the B11, B25, B10, B21, B9 and B18 fuel injector assembly connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	20°C (68°F)	11.6 to 12.4 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Fuel Injector Assembly)

   HINT: 

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

NG → See step   7 

OK: Go to next step 

1. Disconnect the B50 ECM connector.
2. Disconnect the B11, B25, B10, B21, B9 and B18 fuel injector assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B11-2 - B50-6 (#10)	Always	Below 1 Ω
   B25-2 - B50-1 (#20)	Always	Below 1 Ω
   B10-2 - B50-7 (#30)	Always	Below 1 Ω
   B21-2 - B50-2 (#40)	Always	Below 1 Ω
   B9-2 - B50-8 (#50)	Always	Below 1 Ω
   B18-2 - B50-3 (#60)	Always	Below 1 Ω
   B11-2 or B50-6 (#10) - Body ground	Always	10 kΩ or higher
   B25-2 or B50-1 (#20) - Body ground	Always	10 kΩ or higher
   B10-2 or B50-7 (#30) - Body ground	Always	10 kΩ or higher
   B21-2 or B50-2 (#40) - Body ground	Always	10 kΩ or higher
   B9-2 or B50-8 (#50) - Body ground	Always	10 kΩ or higher
   B18-2 or B50-3 (#60) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the B50 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B50-14 (E01) - Body ground	Always	Below 1 Ω
   B50-15 (E02) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check the fuel injector assembly and volume. Refer to INSPECTION .

   HINT: 

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

NG → See step   7 

OK → See step   9 

1. Disconnect the B11, B25, B10, B21, B9 and B18 fuel injector assembly connectors.
2. Disconnect the A1 ignition switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B11-1 - A1-6 (IG2)	Always	Below 1 Ω
   B25-1 - A1-6 (IG2)	Always	Below 1 Ω
   B10-1 - A1-6 (IG2)	Always	Below 1 Ω
   B21-1 - A1-6 (IG2)	Always	Below 1 Ω
   B9-1 - A1-6 (IG2)	Always	Below 1 Ω
   B18-1 - A1-6 (IG2)	Always	Below 1 Ω
   B11-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher
   B25-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher
   B10-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher
   B21-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher
   B9-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher
   B18-1 or A1-6 (IG2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8