Section04ENGINEMANAGEMENT(15034-TEC)
Subsection 02 (DIAGNOSTIC PROCEDURES)
Supplemental Information for
Some Specific Faults
Communication link fault code 1681: Some-
times the information center does not synchronize
fast enough for the MPEM. That brings this fault
code. Simply clear the fault and try again.
ECM fault codes P0601, P0602, P0604 and P605:
These codes may occur in the following situations:
– Electrical noise is picked up by the ECM. En-
sure that all connections are in good condition,
also grounds (battery, ECM, engine and igni-
tion system), they are clean and well tightened
and that all electronic components are genuine
-- particularly in the ignition system. Installing
resistive caps, non-resistive spark plugs or im-
proper knock sensor wiring/routing may lead to
generate this fault code.
– Electrical noise might also lead engine to oc-
casional cutout without generating a fault code
when engine is restarted. When looking at the
fault code, pay attention to the “count” value in
the software B.U.D.S. A value between 1 and
9 confirms an electrical noise problem. A value
of 10 and above will generate a fault code.
– When installing a new ECM. It is not properly
programmed from the factory. The ECM must
be returned to be properly “activated”.
– If everything is in good condition, try a new
ECM.
Fault code P1202: See detailed information un-
der OSPS in subsection COMPONENT INSPEC-
TION, REPLACEMENT AND ADJUSTMENT.
84 smr2005-012
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