4. Diagnostic Steps:
Note
Before carrying out this diagnosis step, observe the data list on scan tool and analyze the accuracy of the data, as
these will help with quick diagnosis.
Step 1
Initial Inspection
(a)
Check for fuel injector wiring harness connector damage,
poor connection, aging and signs of loosening.
Next
Step 2
Measure the fuel injector resistance.
2
1
Cylinder No.3 Fuel Injector
FE02-5064b
(a)
Disconnect the fuel injector wiring harness connector EO13.
(b)
Measure resistance between the two fuel injector terminals.
Standard Resistance: 11.6-12.4 Ω at 20°C(68 ºF)
(c)
Connect the fuel injector wiring harness connector EO13.
No
Replace fuel injector. Refer to
.
Yes
Step 3
Measure fuel injector working power supply.
FE02-5262b
2
1
Cylinder No.3 Fuel Injector Harness
Connector EO13
(a)
Turn the ignition switch to "OFF" position.
(b)
Disconnect cylinder No.3 fuel injector wiring harness
connector EO13.
(c)
Turn the ignition switch to "ON" position.
(d)
Measure voltage between cylinder No.3 fuel injector wiring
harness connector EO13 terminal No.2 and a reliable ground.
Standard Voltage: 11-14 V
(e)
Connect cylinder No.3 fuel injector wiring harness connector
EO13.
Voltage normal?
No
Yes
Step 4
Check the fuel injector control circuit.
2-706
Control System JL4G15-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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