Sfi System Fuel Injector Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)
INSPECT FUEL INJECTOR ASSEMBLY
CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY)
SFI SYSTEM - 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
INSPECTION PROCEDURE
| 1.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
|
B9-1 - Body ground
| Ignition switch ON
| 11 to 14 V
|
B10-1 - Body ground
| Ignition switch ON
| 11 to 14 V
|
B11-1 - Body ground
| Ignition switch ON
| 11 to 14 V
|
B12-1 - Body ground
| Ignition switch ON
| 11 to 14 V
|
Turn the ignition switch off.
Reconnect the fuel injector assembly connectors.
| 2.INSPECT FUEL INJECTOR ASSEMBLY |
Inspect the fuel injector assembly (COROLLA_ZRE142 RM000001EDQ04ZX.html).
| 3.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM) |
Disconnect the fuel injector assembly connectors.
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
|
B9-2 - B31-86 (#10)
| Always
| Below 1 Ω
|
B10-2 - B31-85 (#20)
| Always
| Below 1 Ω
|
B11-2 - B31-84 (#30)
| Always
| Below 1 Ω
|
B12-2 - B31-83 (#40)
| Always
| Below 1 Ω
|
- Standard Resistance (Check for Short):
Tester Connection
| Condition
| Specified Condition
|
B9-2 or B31-86 (#10) - Body ground
| Always
| 10 kΩ or higher
|
B10-2 or B31-85 (#20) - Body ground
| Always
| 10 kΩ or higher
|
B11-2 or B31-84 (#30) - Body ground
| Always
| 10 kΩ or higher
|
B12-2 or B31-83 (#40) - Body ground
| Always
| 10 kΩ or higher
|
Reconnect the fuel injector assembly connectors.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM) |
|
|
| 4.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY) |
Disconnect the fuel injector assembly connectors.
Remove the integration relay from the engine room relay block.
Disconnect the integration relay connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection
| Condition
| Specified Condition
|
B9-1 - 1A-4
| Always
| Below 1 Ω
|
B10-1 - 1A-4
| Always
| Below 1 Ω
|
B11-1 - 1A-4
| Always
| Below 1 Ω
|
B12-1 - 1A-4
| Always
| Below 1 Ω
|
- Standard Resistance (Check for Short):
Tester Connection
| Condition
| Specified Condition
|
B9-1 or 1A-4 - Body ground
| Always
| 10 kΩ or higher
|
B10-1 or 1A-4 - Body ground
| Always
| 10 kΩ or higher
|
B11-1 or 1A-4 - Body ground
| Always
| 10 kΩ or higher
|
B12-1 or 1A-4 - Body ground
| Always
| 10 kΩ or higher
|
Reconnect the fuel injector assembly connectors.
Reconnect the integration relay connector.
Reinstall the integration relay.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - FUEL INJECTOR ASSEMBLY) |
|
|
