Fuel Injector Circuit: Procedure
- INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)
- Disconnect the fuel injector connectors.
- Turn the ignition switch to ON.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition B11-1 - Body ground Ignition switch ON 11 to 14 V B25-1 - Body ground Ignition switch ON 11 to 14 V B10-1 - Body ground Ignition switch ON 11 to 14 V B21-1 - Body ground Ignition switch ON 11 to 14 V B9-1 - Body ground Ignition switch ON 11 to 14 V B18-1 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION*1 Front view of wire harness connector
(to Fuel Injector)
NG → See step 6
OK: Go to next step
- INSPECT FUEL INJECTOR ASSEMBLY (INJECTOR RESISTANCE)
- Disconnect the fuel injector connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 11.6 to 12.4 Ω TEXT IN ILLUSTRATION*1 Component without harness connected
(Fuel Injector Assembly)
NG → See step 9
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
- Disconnect the ECM connector.
- Disconnect the fuel injector connectors.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Short)
Tester Connection Condition Specified Condition B11-2 - B50-6 (#10) Always Below 1 Ω B25-2 - B50-1 (#20) Always Below 1 Ω B10-2 - B50-7 (#30) Always Below 1 Ω B21-2 - B50-2 (#40) Always Below 1 Ω B9-2 - B50-8 (#50) Always Below 1 Ω B18-2 - B50-3 (#60) Always Below 1 Ω Standard Resistance (Check for Open)
Tester Connection Condition Specified Condition B11-2 or B50-6 (#10) - Body ground Always 10 kΩ or higher B25-2 or B50-1 (#20) - Body ground Always 10 kΩ or higher B10-2 or B50-7 (#30) - Body ground Always 10 kΩ or higher B21-2 or B50-2 (#40) - Body ground Always 10 kΩ or higher B9-2 or B50-8 (#50) - Body ground Always 10 kΩ or higher B18-2 or B50-3 (#60) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open)
Tester Connection Condition Specified Condition B50-14 (E01) - Body ground Always Below 1 Ω B50-15 (E02) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)
- Check the fuel injector and volume. Refer toINSPECTION .
NG → See step 9
OK → See step 8
- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IGNITION SWITCH)
- Disconnect the fuel injector connectors.
- Disconnect the ignition switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Short)
Tester Connection Condition Specified Condition B11-1 - A1-6 (IG2) Always Below 1 Ω B25-1 - A1-6 (IG2) Always Below 1 Ω B10-1 - A1-6 (IG2) Always Below 1 Ω B21-1 - A1-6 (IG2) Always Below 1 Ω B9-1 - A1-6 (IG2) Always Below 1 Ω B18-1 - A1-6 (IG2) Always Below 1 Ω Standard Resistance (Check for Open)
Tester Connection Condition Specified Condition B11-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher B25-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher B10-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher B21-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher B9-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher B18-1 or A1-6 (IG2) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 7
- REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT. Refer to ECM Power Source Circuit
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- REPLACE FUEL INJECTOR ASSEMBLY. Refer to REMOVAL