Fuel Injector Circuit
1GR-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
PROCEDURE
1. INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)
(a) Disconnect the fuel injector assembly connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IGNITION SWITCH)
OK -- Continue to next step.
2. INSPECT FUEL INJECTOR ASSEMBLY (INJECTOR RESISTANCE)
(a) Inspect the fuel injector assembly Testing and Inspection.
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 connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
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 according to the value(s) in the table below.
Standard Resistance:
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 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)
(a) Disconnect the fuel injector assembly connector.
(b) Disconnect the ignition switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- CHECK ECM POWER SOURCE CIRCUIT ECM Power Source Circuit