Fuel injectors operating voltage is provided by The Main Relay controlled by ECM. battery voltage passes through the main relay
terminal No.3 to all fuel injector wiring harness connectors terminal No.1. ECM controls Cylinder No.3 fuel injector internal ground
circuit through ECM harness connector EO01 terminal No.64. ECM monitors all fuel injector driver circuits status, if ECM detects
driving circuit status corresponding voltage is incorrect, ECM will set a fuel injector control circuit fault DTC code.
2. Conditions For Setting DTC and The Fault Location:
DTC Code
DTC Detection Strategy
Conditions For Setting The DTC
(Control Strategy)
Fault Locations
P0267
Hardware Circuit Checks
Injector Signal Circuit Open or Short
To Ground
1. Sensor Circuit
2. Sensor
3. ECM
P0268
Hardware Circuit Checks
Injector Signal Circuit Short To Power
Supply
1. Sensor Circuit
2. Sensor
3. ECM
3. Schematic
MAIN
EF12
5
2
3
1
1
2
MPR
EO01 INJB
EO35
62
64
Main Relay
From Battery
Engine
Control
Module
Cylinder No.3 Fuel Injector
FE02-5261b
Engine
Control System JL4G15-D
2-705
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
Page 4: ......
Page 330: ...Next Step 10 End 2 248 Fuel System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Page 1164: ......
Page 2008: ......