Diagnosis Procedure

1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground.

Is the inspection result normal? 

YES: GO TO  3.

NO: GO TO 2.

Check the following.

• Harness connectors E46, E94, F22 or F103
• 15 A fuse (No. 87)
• 30 A fuse (No. 71)
• Harness for open or short between ECM and fuse
• Fuel injector relay. Refer to "COMPONENT INSPECTION (FUEL INJECTOR RELAY) "

: Repair open circuit, short to ground or short to power in harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector and ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.

   Cylinder	+		-		Continuity
   	Fuel injector		ECM
   	Connector	Terminal	Connector	terminal
   1	F123	1	F110	101	Existed
   		2		108
   2	F124	1	F111	7
   		2		4
   3	F125	1	F111	6
   		2		3
   4	F126	1	F110	107
   		2		104
   5	F127	1	F111	2
   		2		9
   6	F128	1	F110	102
   		2		109
   7	F129	1	F110	106
   		2		103
   8	F130	1	F111	1
   		2		8

4. Also check harness for short to ground and to power.

Is the inspection result normal? 

YES: GO TO 4.

NO: Repair or replace error-detected parts.

Check the continuity between ECM harness connector and ground.

Is inspection result normal? 

YES: GO TO 5.

NO: Repair or replace error-detected parts.

Refer to "COMPONENT INSPECTION (FUEL INJECTOR) ".

Is the inspection result normal? 

YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

NO: Replace malfunctioning fuel injector. Refer to "REMOVAL AND INSTALLATION ".