SFI SYSTEM (w/ EGR System) Fuel Injector Circuit

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

PROCEDURE

1. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

   
   
   1. 

      Text in Illustration

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

      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

   4. Reconnect the fuel injector assembly connectors.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY) Click here

   OK

2. INSPECT FUEL INJECTOR ASSEMBLY

   
   

   1. Inspect the fuel injector assembly Click here.

   
   

   NG

   REPLACE FUEL INJECTOR ASSEMBLY Click here

   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 (Check for Open)
      Tester Connection Condition Specified Condition D14-2 - D28-85 (#10) Always Below 1 Ω D15-2 - D28-84 (#20) Always Below 1 Ω D16-2 - D28-83 (#30) Always Below 1 Ω D17-2 - D28-82 (#40) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition D14-2 or D28-85 (#10) - Body ground Always 10 Ω or higher D15-2 or D28-84 (#20) - Body ground Always 10 Ω or higher D16-2 or D28-83 (#30) - Body ground Always 10 Ω or higher D17-2 or D28-82 (#40) - Body ground Always 10 Ω or higher

      Text in Illustration

      *1

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

      *2

      Front view of wire harness connector (to ECM)

   4. Reconnect the fuel injector assembly connectors.

   5. Reconnect the ECM connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

4. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY)

   
   

   1. Disconnect the fuel injector assembly connectors.

      

   2. Remove the integration relay from the engine room relay block.

   3. Disconnect the integration relay connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition D14-1 - 1A-4 Always Below 1 Ω D15-1 - 1A-4 Always Below 1 Ω D16-1 - 1A-4 Always Below 1 Ω D17-1 - 1A-4 Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition D14-1 or 1A-4 - Body ground Always 10 kΩ or higher D15-1 or 1A-4 - Body ground Always 10 kΩ or higher D16-1 or 1A-4 - Body ground Always 10 kΩ or higher D17-1 or 1A-4 - Body ground Always 10 kΩ or higher

      Text in Illustration

      *1	Front view of wire harness connector (to Fuel Injector Assembly)	*2	Integration Relay
      *3	Front view of wire harness connector (to Integration Relay)	-	-

   5. Reconnect the fuel injector assembly connectors.

   6. Reconnect the integration relay connector.

   7. Reinstall the integration relay.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY)

   OK

   CHECK ECM POWER SOURCE CIRCUIT Click here