Injectors (Dtc 261, 262, 264, 265, 267, 268, 270, 271) - Kubota WG1605-E3 Diagnostic Manual

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM

(11) Injectors (DTC 261, 262, 264, 265, 267, 268, 270, 271)

DTC 261-Injector Driver #1 Open/Short-To-Ground
DTC 264-Injector Driver #2 Open/Short-To-Ground
DTC 267-Injector Driver #3 Open/Short-To-Ground
DTC 270-Injector Driver #4 Open/Short-To-Ground
• Hardware: Each Injector Driver (each cylinder in the block order)
• Enabling Conditions: Key-On, Engine Running
• Set Conditions: Battery voltage at ECM greater than 9.00 V and each injector driver off voltage less than 4.00 V
for 10 samples
• Corrective Action(s): Illuminate MIL, Disable Closed Loop operation while fault is active, disable fuel adaptive
learn for the rest of the key cycle.
• Emissions-related fault
• Possible Causes: Loss of 12.0 V feed to injector, open injector coil, open or shorted to ground injector driver circuit
in engine harness, bad ECM
DTC 262-Injector Driver #1 Short-To-Power
DTC 265-Injector Driver #2 Short-To-Power
DTC 268-Injector Driver #3 Short-To-Power
DTC 271-Injector Driver #4 Short-To-Power
• Hardware: Each Injector Driver (each cylinder in the block order)
• Enabling Conditions: Key-On, Engine Running
• Set Conditions: Battery voltage at ECM less than 16.0 V and each injector driver on voltage greater than 4.00 V
for 10 samples
• Corrective Action(s): Illuminate MIL, Disable Closed Loop operation while fault is active, disable fuel adaptive
learn for the rest of the key cycle.
• Emissions-related fault
• Possible Causes: Injector coil shorted internally, injector driver circuit shorted to voltage between injector and
ECM, bad ECM
The fuel injector is an electronically controlled valve and nozzle that is controlled to deliver a precise quantity of
fuel to a cylinder. Each fuel injector is supplied 12.0 V from the power relay and is operated by the ECM through a
low side driver (LSD) circuit that is monitored for the correct voltage for the current state of the injector (on or off).
1-176
ECM SYSTEM
KiSC issued 12, 2016 A