Fuel Injector Circuit: Procedure

1. Disconnect the fuel injector connectors.
   Fig 1: Measuring Voltage Of Fuel Injector Connectors

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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
   C4-1 - Body ground	Ignition switch ON	11 to 14 V
   C5-1 - Body ground	Ignition switch ON	11 to 14 V
   C6-1 - Body ground	Ignition switch ON	11 to 14 V
   C7-1 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   5 

OK: Go to next step 

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

NG → See step   6 

OK: Go to next step 

1. Disconnect the C19 ECM connector.
2. Disconnect the C4, C5, C6 and C7 fuel injector connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C4-2 - C19-86 (#10)	Always	Below 1 Ω
   C5-2 - C19-85 (#20)	Always	Below 1 Ω
   C6-2 - C19-84 (#30)	Always	Below 1 Ω
   C7-2 - C19-83 (#40)	Always	Below 1 Ω
   C4-2 or C19-86 (#10) - Body ground	Always	10 kΩ or higher
   C5-2 or C19-85 (#20) - Body ground	Always	10 kΩ or higher
   C6-2 or C19-84 (#30) - Body ground	Always	10 kΩ or higher
   C7-2 or C19-83 (#40) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the C19 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C19-46 (E01) - Body ground	Always	Below 1 Ω
   C19-45 (E02) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8 

1. Disconnect the C4, C5, C6 and C7 fuel injector connectors.
2. Remove the integration relay from the engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C4-1 - 1B-4	Always	Below 1 Ω
   C5-1 - 1B-4	Always	Below 1 Ω
   C6-1 - 1B-4	Always	Below 1 Ω
   C7-1 - 1B-4	Always	Below 1 Ω
   C4-1 or 1B-4 - Body ground	Always	10 kΩ or higher
   C5-1 or 1B-4 - Body ground	Always	10 kΩ or higher
   C6-1 or 1B-4 - Body ground	Always	10 kΩ or higher
   C7-1 or 1B-4 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7