6E–133
3.2L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0202 (Flash DTC=31) Injector 2 Control
Circuit
060RW055
Circuit Description
The Engine Control Module ECM has six individual
injector driver circuits. Each controls an injector. When a
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 P0202 will clear after 40 consecutive
warm-up cycles occur without a fault.
D
DTC P0202 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 P0202 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.