Sfi System Fuel Injector Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK ECM (#10, #20, #30, #40, #50, #60 VOLTAGE)
INSPECT INJECTOR ASSEMBLY
INSPECT IGNITION RELAY NO. 2
CHECK HARNESS AND CONNECTOR (ECM - INJECTOR)
CHECK HARNESS AND CONNECTOR (INJECTOR - IG2 RELAY)
INSPECT FUSE (IG2 FUSE)
INSPECT IGNITION RELAY NO. 2 (VOLTAGE)
CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)
CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU)
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 ECM (#10, #20, #30, #40, #50, #60 VOLTAGE) |
Disconnect the C58 (RHD) or C55 (LHD) ECM connector.
Turn the engine switch on (IG).
Measure the voltage between the terminals.
- Standard voltage:
- RHD:
Tester Connection
| Specified Condition
|
#10 (C58-45) - E01 (C58-22)
| 11 to 14 V
|
#20 (C58-85) - E01 (C58-22)
| 11 to 14 V
|
#30 (C58-44) - E01 (C58-22)
| 11 to 14 V
|
#40 (C58-84) - E01 (C58-22)
| 11 to 14 V
|
#50 (C58-43) - E01 (C58-22)
| 11 to 14 V
|
#60 (C58-83) - E01 (C58-22)
| 11 to 14 V
|
- LHD:
Tester Connection
| Specified Condition
|
#10 (C55-45) - E01 (C55-22)
| 11 to 14 V
|
#20 (C55-85) - E01 (C55-22)
| 11 to 14 V
|
#30 (C55-44) - E01 (C55-22)
| 11 to 14 V
|
#40 (C55-84) - E01 (C55-22)
| 11 to 14 V
|
#50 (C55-43) - E01 (C55-22)
| 11 to 14 V
|
#60 (C55-83) - E01 (C55-22)
| 11 to 14 V
|
Reconnect the ECM connector.
| | CHECK FOR INTERMITTENT PROBLEMS |
|
|
| 2.INSPECT INJECTOR ASSEMBLY |
Inspect the injector assembly (CAMRY_ACV40 RM000001IR101CX.html).
| 3.INSPECT IGNITION RELAY NO. 2 |
Remove the IG2 relay from the engine room R/B.
Measure the resistance between the terminals.
- Standard resistance:
Tester Connection
| Specified Condition
|
3 - 5
| 10 kΩ or higher
|
3 - 5
| Below 1 Ω
(Apply battery voltage between terminals 1 and 2)
|
Reinstall the IG2 relay.
| | REPLACE IGNITION RELAY NO. 2 |
|
|
| 4.CHECK HARNESS AND CONNECTOR (ECM - INJECTOR) |
Disconnect the injector connector.
Disconnect the C58 (RHD) or C55 (LHD) ECM connector.
Measure the resistance between the terminals.
- Standard resistance:
- RHD:
Tester Connection
| Specified Condition
|
#10 (C58-45) - C7-1
| Below 1 Ω
|
#20 (C58-85) - C9-1
| Below 1 Ω
|
#30 (C58-44) - C8-1
| Below 1 Ω
|
#40 (C58-84) - C10-1
| Below 1 Ω
|
#50 (C58-43) - C36-1
| Below 1 Ω
|
#60 (C58-83) - C37-1
| Below 1 Ω
|
#10 (C58-45) or C7-1 - Body ground
| 10 kΩ or higher
|
#20 (C58-85) or C9-1 - Body ground
| 10 kΩ or higher
|
#30 (C58-44) or C8-1 - Body ground
| 10 kΩ or higher
|
#40 (C58-84) or C10-1 - Body ground
| 10 kΩ or higher
|
#50 (C58-43) or C36-1 - Body ground
| 10 kΩ or higher
|
#60 (C58-83) or C37-1 - Body ground
| 10 kΩ or higher
|
- LHD:
Tester Connection
| Specified Condition
|
#10 (C55-45) - C7-1
| Below 1 Ω
|
#20 (C55-85) - C9-1
| Below 1 Ω
|
#30 (C55-44) - C8-1
| Below 1 Ω
|
#40 (C55-84) - C10-1
| Below 1 Ω
|
#50 (C55-43) - C36-1
| Below 1 Ω
|
#60 (C55-83) - C37-1
| Below 1 Ω
|
#10 (C55-45) or C7-1 - Body ground
| 10 kΩ or higher
|
#20 (C55-85) or C9-1 - Body ground
| 10 kΩ or higher
|
#30 (C55-44) or C8-1 - Body ground
| 10 kΩ or higher
|
#40 (C55-84) or C10-1 - Body ground
| 10 kΩ or higher
|
#50 (C55-43) or C36-1 - Body ground
| 10 kΩ or higher
|
#60 (C55-83) or C37-1 - Body ground
| 10 kΩ or higher
|
Reconnect the injector connector.
Reconnect the ECM connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.CHECK HARNESS AND CONNECTOR (INJECTOR - IG2 RELAY) |
Remove the IG2 relay from the engine room relay block.
Disconnect the injector connectors.
Measure the resistance between the terminals.
- Standard resistance (check for open):
Tester Connection
| Specified Condition
|
C7-2 - IG2 relay terminal 3
| Below 1 Ω
|
C9-2 - IG2 relay terminal 3
| Below 1 Ω
|
C8-2 - IG2 relay terminal 3
| Below 1 Ω
|
C10-2 - IG2 relay terminal 3
| Below 1 Ω
|
C36-2 - IG2 relay terminal 3
| Below 1 Ω
|
C37-2 - IG2 relay terminal 3
| Below 1 Ω
|
- Standard resistance (check for short):
Tester Connection
| Specified Condition
|
C7-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
C9-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
C8-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
C10-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
C36-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
C37-2 or IG2 relay terminal 3 - Body ground
| 10 kΩ or higher
|
Reinstall the IG2 relay.
Reconnect the injector connectors.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 6.INSPECT FUSE (IG2 FUSE) |
Remove the IG2 fuse from the engine room relay block.
Measure the IG2 fuse resistance.
- Standard resistance:
- Below 1 Ω
Reinstall the IG2 fuse.
| 7.INSPECT IGNITION RELAY NO. 2 (VOLTAGE) |
Remove the IG2 relay from the engine room relay block.
Measure the IG2 relay voltage.
- Standard voltage:
- 9 to 14 V
Reinstall the IG2 relay.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BATTERY) |
|
|
| 8.CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND) |
Remove the IG2 relay from the engine room R/B.
Measure the resistance between the terminals.
- Standard resistance:
Tester Connection
| Specified Condition
|
IG2 relay terminal 2 - Body ground
| Below 1 Ω
|
Reinstall the IG2 relay.
- Result:
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 9.CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU) |
Remove the IG2 relay from the engine room relay block.
Disconnect the E6 main body ECU connector.
Measure the resistance between the terminals.
- Standard resistance (check for open):
Tester Connection
| Specified Condition
|
IG2 relay terminal 1 - IG2D (E6-11)
| Below 1 Ω
|
- Standard resistance (check for short):
Tester Connection
| Specified Condition
|
IG2 relay terminal 1 or IG2D (E6-11) - Body ground
| 10 kΩ or higher
|
Reinstall the IG2 relay.
Reconnect the main body ECU connector.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK |
|
|
|
| GO TO ENTRY AND START SYSTEM |
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