6E–145
3.2L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0206 (Flash DTC=31) Injector 6 Control
Circuit
060RW055
Circuit Description
The Engine Control Module ECM has six individual
injector driver circuits. Each controls an injector. When
the driver circuit is grounded by the ECM, the injector is
activated. The ECM monitors the current in each driver
circuit. The voltage on each driver is monitored to detect
a fault. If the voltage is not what the ECM expects to
monitor on the circuit, a DTC is set. This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.
Conditions for Setting the DTC
D
The battery voltage is more than 11 volts.
D
Injector pulse reading is between 2.5m second and
7.5m second.
D
No fuel cut.
D
Engine running speed is between 700 r.p.m and 2000
r.p.m.
D
No related CKP CMP DTCs.
D
No injector pulse reading with engine running speed is
200 r.p.m.
Action Taken When the DTC Sets
D
The ECM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
D
The ECM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC
D
The ECM will turn “OFF” the MIL on the third
consecutive trip cycle in which the diagnostic has been
run and the fault is no longer present.
D
A history DTC P0206 will clear after 40 consecutive
warm-up cycles occur without a fault.
D
DTC P0206 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the ECM battery
feed.
Diagnostic Aids
An injector driver circuit that is open or shorted to voltage
will cause a DTC P0206 to set. It will also cause a misfire
due to an inoperative injector. A misfire DTC will also be
set indicating which cylinder is inoperative.
Long term and short term fuel trims that are excessively
high or low are a good indication that an injector is faulty.
Use Fuel Injector Coil Test Procedure to check for faulty
injectors.