Fuel Injector Circuit

2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector Circuit
- Fuel Injector Circuit

DESCRIPTION

The fuel injectors inject fuel based on the signals from the ECM.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)

(a) Disconnect the fuel injector assembly connectors.





(b) Turn the ignition switch to ON.

(c) Measure the voltage.

Standard Voltage:





NG -- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IGNITION SWITCH ASSEMBLY)
OK -- Continue to next step.

2. INSPECT FUEL INJECTOR ASSEMBLY (INJECTOR RESISTANCE)





(a) Disconnect the fuel injector assembly connectors.

(b) Measure the resistance.

Standard Resistance:





NG -- REPLACE FUEL INJECTOR ASSEMBLY Removal
OK -- Continue to next step.

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

(a) Disconnect the ECM connector.





(b) Disconnect the fuel injector assembly connectors.

(c) Measure the resistance.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)





(a) Disconnect the ECM connector.

(b) Measure the resistance.

Standard Resistance (Check for Open):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)

(a) Check the fuel injector injection and volume Testing and Inspection.

NG -- REPLACE FUEL INJECTOR ASSEMBLY Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

6. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IGNITION SWITCH ASSEMBLY)





(a) Disconnect the fuel injector assembly connectors.

(b) Disconnect the ignition switch assembly connector.

(c) Measure the resistance.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT ECM Power Source Circuit