Fuel Injector Circuit [12/2015 - 08/2016]: Procedure
WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)
- Disconnect the fuel injector assembly 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 B7-2 - Body ground Ignition switch ON 11 to 14 V B8-2 - Body ground Ignition switch ON 11 to 14 V B9-2 - Body ground Ignition switch ON 11 to 14 V B10-2 - Body ground Ignition switch ON 11 to 14 V B11-2 - Body ground Ignition switch ON 11 to 14 V B12-2 - Body ground Ignition switch ON 11 to 14 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Fuel Injector Assembly)
Result:
NG
See step 4
Result:
OK
See step 2
- Disconnect the fuel injector assembly connectors.
- INSPECT FUEL INJECTOR ASSEMBLY
- Inspect the fuel injector assembly (Refer to INSPECTION [12/2015 - 08/2016]
).
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly (Refer to INITIALIZATION [12/2015 - 08/2016] ).
Result:
NG
REPLACE FUEL INJECTOR ASSEMBLY
(Refer to REMOVAL [12/2015 - 08/2016] )
Result:
OK
See step 3
- Inspect the fuel injector assembly (Refer to INSPECTION [12/2015 - 08/2016]
).
- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
- Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors.
- Disconnect the B1 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition B7-1 - B1-86 (#10) Always Below 1 Ω B8-1 - B1-109 (#20) Always Below 1 Ω B9-1 - B1-85 (#30) Always Below 1 Ω B10-1 - B1-108 (#40) Always Below 1 Ω B11-1 - B1-84 (#50) Always Below 1 Ω B12-1 - B1-107 (#60) Always Below 1 Ω B7-1 or B1-86 (#10) - Body ground Always 10 kΩ or higher B8-1 or B1-109 (#20) - Body ground Always 10 kΩ or higher B9-1 or B1-85 (#30) - Body ground Always 10 kΩ or higher B10-1 or B1-108 (#40) - Body ground Always 10 kΩ or higher B11-1 or B1-84 (#50) - Body ground Always 10 kΩ or higher B12-1 or B1-107 (#60) - Body ground Always 10 kΩ or higher
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
(Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] )
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- CHECK HARNESS AND CONNECTOR (IG2 RELAY - FUEL INJECTOR ASSEMBLY)
- Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors.
- Remove the IG2 relay from the engine room relay block.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition B7-2 - 3 (IG2 relay holder) Always Below 1 Ω B8-2 - 3 (IG2 relay holder) Always Below 1 Ω B9-2 - 3 (IG2 relay holder) Always Below 1 Ω B10-2 - 3 (IG2 relay holder) Always Below 1 Ω B11-2 - 3 (IG2 relay holder) Always Below 1 Ω B12-2 - 3 (IG2 relay holder) Always Below 1 Ω B7-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher B8-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher B9-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher B10-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher B11-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher B12-2 or 3 (IG2 relay holder) - Body ground Always 10 kΩ or higher
Result:
OK
CHECK ECM POWER SOURCE CIRCUIT
(Refer to ECM Power Source Circuit [12/2015 - 08/2016] )
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR