Fuel Injector Circuit 2ZR-FXE

Fuel Injector Circuit

Description

Wiring diagram

Inspection procedure

Check fuel injector assembly (power source voltage)

Inspect fuel injector assembly

Check harness and connector (fuel injector assembly - ecm)

Check harness and connector (no. 2 integration relay (ig2 relay) - fuel injector assembly)

Description

The fuel injectors are located on the intake manifold. They inject fuel into the cylinders based on the signals from the ECM.

Wiring diagram

Inspection procedure

1.CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE VOLTAGE)

1. Disconnect the fuel injector assembly connectors.

2. Turn the power switch on (IG).

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   D14-1 - Body ground	Power switch on (IG)	11 to 14 V
   D15-1 - Body ground	Power switch on (IG)	11 to 14 V
   D16-1 - Body ground	Power switch on (IG)	11 to 14 V
   D17-1 - Body ground	Power switch on (IG)	11 to 14 V

   Text in Illustration

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

NG	Go to step 4

OK

2.INSPECT FUEL INJECTOR ASSEMBLY

1. Inspect the fuel injector assembly .

NG	REPLACE FUEL INJECTOR ASSEMBLY

OK

3.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

1. Disconnect the fuel injector assembly connectors.

2. Disconnect the ECM connector.

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D14-2 - D27-85 (#10)	Always	Below 1 ?
   D15-2 - D27-84 (#20)	Always	Below 1 ?
   D16-2 - D27-83 (#30)	Always	Below 1 ?
   D17-2 - D27-82 (#40)	Always	Below 1 ?
   D14-2 or D27-85 (#10) - Body ground	Always	10 ? or higher
   D15-2 or D27-84 (#20) - Body ground	Always	10 ? or higher
   D16-2 or D27-83 (#30) - Body ground	Always	10 ? or higher
   D17-2 or D27-82 (#40) - Body ground	Always	10 ? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

4.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY)

1. Disconnect the fuel injector assembly connectors.

2. Remove the No. 2 integration relay from the engine room relay block.

3. Disconnect the No. 2 integration relay connector.

4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D14-1 - 1A-4	Always	Below 1 ?
   D15-1 - 1A-4	Always	Below 1 ?
   D16-1 - 1A-4	Always	Below 1 ?
   D17-1 - 1A-4	Always	Below 1 ?
   D14-1 or 1A-4 - Body ground	Always	10 k? or higher
   D15-1 or 1A-4 - Body ground	Always	10 k? or higher
   D16-1 or 1A-4 - Body ground	Always	10 k? or higher
   D17-1 or 1A-4 - Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK ECM POWER SOURCE CIRCUIT