Workshop Manual

6E–290
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0354 Ignition 4 Control Circuit
060R200055
Circuit Description
ION Sensing Module has the function to energize and
de-energize the primary ignition coil in response to
signals from the PCM. The PCM controls ignition timing
and dwell time.
This diagnosis detects open circuit or short-circuiting in
the Ignition Electronic Spark Timing (EST) line by
monitoring EST signals. A failure determination is made
when the signal voltage remains higher or lower than the
threshold for corresponding fault code beyond a
predetermined time period.
When the PCM detects a problem on EST control circuit
4, it will set a DTC P0354.
Conditions for Setting the DTC
B The ignition is “ON”.
B The engine is running, determined by the 58X
crankshaft position input signal.
B The output voltage is not equal to 5 volts when output
is “ON”.
B The output voltage is not equal to 0 volts when output
is “OFF”.
B Ten test failures occur within 10 samples of continuous
spark events.
Action Taken When the DTC Sets
B The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
B The PCM 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
B The PCM will turn the MIL “OFF” on the third
consecutive trip cycle in which the diagnostic has been
run and the fault condition is no longer present.
B A history DTC P0354 will clear after 40 consecutive
warm-up cycles occur without a fault.
B DTC P0354 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.