Fuel Injector Circuit: Procedure
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
- Disconnect the fuel injector assembly connectors.
- Turn the power switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition D25-1 - Body ground Power switch on (IG) 11 to 14 V D30-1 - Body ground Power switch on (IG) 11 to 14 V F1-1 - Body ground Power switch on (IG) 11 to 14 V F2-1 - 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 → See step 4
OK: Go to next step
- INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)
- Check the fuel injector assembly injection and volume. Refer to INSPECTION [06/2012 - ]
.
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly. Refer to INITIALIZATION [06/2012 - ] .
NG → See step 6
OK: Go to next step
- Check the fuel injector assembly injection and volume. Refer to INSPECTION [06/2012 - ]
.
- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
- Disconnect the ECM connector.
- Disconnect the fuel injector assembly connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition D25-2 - D24-20 (#10) Always Below 1 Ω D30-2 - D24-17 (#20) Always Below 1 Ω F1-2 - D24-18 (#30) Always Below 1 Ω F2-2 - D24-19 (#40) Always Below 1 Ω D25-2 or D24-20 (#10) - Body ground Always 10 kΩ or higher D30-2 or D24-17 (#20) - Body ground Always 10 kΩ or higher F1-2 or D24-18 (#30) - Body ground Always 10 kΩ or higher F2-2 or D24-19 (#40) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 7
- CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - FUEL INJECTOR ASSEMBLY)
- Disconnect the fuel injector assembly connectors.
- Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition D25-1 - 1A-3 Always Below 1 Ω D30-1 - 1A-3 Always Below 1 Ω F1-1 - 1A-3 Always Below 1 Ω F2-1 - 1A-3 Always Below 1 Ω D25-1 or 1A-3 - Body ground Always 10 kΩ or higher D30-1 or 1A-3 - Body ground Always 10 kΩ or higher F1-1 or 1A-3 - Body ground Always 10 kΩ or higher F2-1 or 1A-3 - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 5
- CHECK ECM POWER SOURCE CIRCUIT. Refer to ECM Power Source Circuit
- REPLACE FUEL INJECTOR ASSEMBLY. Refer to REMOVAL [06/2012 - ]
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [06/2012 - ]