Injectors jet out high pressure fuel caculated by ECM to each cyliders. Direct and separated injections improve fuel efficiency and engine power.
The IDB(injector driver box) controls injector operation. If the IDB receives signal for injector operation from ECM, IDB boosts the voltage and uses current by voltage difference between HIGH and LOW side of injector circuit as injector operating current.
If there is Open in injector #6 circuit (IDB ~ injector #6), ECM sets DTC P0206.
Item
Detecting Condition
Possible Cause
DTC Strategy
Circuit continuity check, open
Poor Connection
Open in HIGH side circuit
Open in LOW side circuit
Injector
IDB
Enable Conditions
No disabling Faults Present
Normal IDB supply voltage
Threshold value
Open in HIGH/LOW side circuit
Diagnosis Time
0.75 sec.
MIL On Condition
3 Drive Cycles
Specification
Coil Resistance (?)
0.98~1.14 [20?(68?)]
Fig.1) Normal waveform of Injector High/Low side line at idle.