Fuel Injector Circuit

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

Refer to DTC P0300 P0300.

INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

(a) Disconnect the fuel injector assembly connectors.





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

Standard Voltage:





Text in Illustration





(c) Turn the ignition switch off.

(d) Reconnect the fuel injector assembly connectors.

NG -- CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [IG2 RELAY] - FUEL INJECTOR ASSEMBLY)
OK -- Continue to next step.

2. INSPECT FUEL INJECTOR ASSEMBLY

(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 fuel injector assembly connectors.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





(d) Reconnect the fuel injector assembly connectors.

(e) Reconnect the ECM connector.

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

OK -- REPLACE ECM Removal

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

(a) Disconnect the fuel injector assembly connectors.

(b) Remove the integration relay (IG2 relay) from the engine room relay block.

(c) Disconnect the integration relay connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





(e) Reconnect the fuel injector connector.

(f) Reinstall the integration relay.

(g) Reconnect the integration relay connector.

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

OK -- CHECK ECM POWER SOURCE CIRCUIT Component Tests and General Diagnostics