Sfi System - Fuel Injector Circuit(2009/01 - )

1. Description

2. Wiring diagram

3. Inspection procedure

4. Inspect ecm (#10, #20, #30, #40 voltage)

5. Inspect fuel injector (resistance)

6. Check harness and connector

7. Inspect ignition relay no. 2

8. Check harness and connector (ig2 relay - body ground)

9. Inspect fuse (inj fuse)

10. Inspect ignition switch

11. Check harness and connector (injector - ecm)

12. Check harness and connector (ecm - body ground)

13. Inspect fuel injector (fuel injection volume)

SFI SYSTEM > Fuel Injector Circuit

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DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Disconnect the C24 ECM connector.

2. Turn the ignition switch to the ON position.

3. Measure the voltage between the terminals of the ECM connector.

   Standard voltage:

   Tester Connection	Specified Condition
   #10 (C24-108) - Body ground	9 to 14 V
   #20 (C24-107) - Body ground
   #30 (C24-106) - Body ground
   #40 (C24-105) - Body ground

4. Reconnect the ECM connector.

OK	Go to step 9

NG

1. Inspect the fuel injector (Click here).

NG	REPLACE FUEL INJECTOR

OK

1. Disconnect the C7 to C10 injector connectors.

2. Turn the ignition switch to the ON position.

3. Measure the voltage.

   Standard voltage:

   Cylinder	Tester Connection	Specified Condition
   No. 1	C7-1 - Body ground	11 to 14 V
   No. 2	C9-1 - Body ground
   No. 3	C8-1 - Body ground
   No. 4	C10-1 - Body ground

   Result:

   Result	Proceed to
   NG (RHD)	A
   NG (LHD)	B
   OK	C

4. Reconnect the injector connectors.

B	Go to step 6
C	Go to step 8

A

1. Remove the IG2 relay from the engine room R/B.

2. Measure the resistance between the terminals.

   Standard resistance:

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   	Below 1 Ω (Apply battery voltage between terminals 1 and 2)

3. Reinstall the IG2 relay.

NG	REPLACE IGNITION RELAY NO. 2

OK

1. Remove the IG2 relay from the engine room R/B.

2. Measure the resistance between the terminals.

   Standard resistance:

   Tester Connection	Specified Condition
   IG2 relay terminal 2 - Body ground	Below 1 Ω

3. Reinstall the IG2 relay.

OK	Go to step 7

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

1. Remove the INJ fuse from the instrument panel J/B.

2. Measure the fuse resistance.

   Standard resistance:

   Below 1 Ω
   

3. Reinstall the fuse.

NG	REPLACE FUSE (INJ FUSE)

OK

1. Disconnect the E23 ignition switch connector.

2. Measure the resistance between the terminals.

   Standard resistance:

   Tester Connection	Ignition Switch Position	Specified Condition
   All Terminals	LOCK	10 kΩ or higher
   2 - 4	ACC	Below 1 Ω
   1 - 2 - 4, 5 - 6	ON
   1 - 3 - 4, 5 - 6 - 7	START

3. Reconnect the ignition switch connector.

NG	REPLACE IGNITION SWITCH

OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - FUEL INJECTOR)

1. Disconnect the C7 to C10 injector connectors.

2. Disconnect the C24 ECM connector.

3. Measure the resistance between the injector and the ECM connector terminals.

   Standard resistance:

   Cylinder	Tester Connection	Specified Condition
   No. 1	C7-2 or #10 (C24-108) - Body ground	10 kΩ or higher
   	C7-2 - #10 (C24-108)	Below 1 Ω
   No. 2	C9-2 or #20 (C24-107) - Body ground	10 kΩ or higher
   	C9-2 - #20 (C24-107)	Below 1 Ω
   No. 3	C8-2 or #30 (C24-106) - Body ground	10 kΩ or higher
   	C8-2 - #30 (C24-106)	Below 1 Ω
   No. 4	C10-2 or #40 (C24-105) - Body ground	10 kΩ or higher
   	C10-2 - #40 (C24-105)	Below 1 Ω

4. Reconnect the injector connectors.

5. Reconnect the ECM connector.

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Disconnect the C24 ECM connector.

2. Measure the resistance.

   Standard resistance:

   Tester Connection	Specified Condition
   E01 (C24-45) - Body ground	Below 1 Ω
   E02 (C24-44) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. Inspect the fuel injector (Click here).

NG	REPLACE FUEL INJECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE