Mitsubishi 3000GT 1991 Service Manual page 190

FUEL SYSTEM -
DETONATION SENSOR
OPERATION
The detonation sensor generates a voltage proportional to the magnitude of cylinder block vibration due to
knocking and inputs it to the engine control unit. Based on this signal, the engine control unit provides retard
control of the ignition timing.
TROUBLESHOOTING HINTS
When knocking occurs while driving under high-load conditions, the following problems are suspected in
addition to the detonation sensor itself.
(1) Inappropriate ignition plug heat range
(2) Inappropriate gasoline
(3) Incorrectly adjusted reference ignition timing
n-vehicle Inspection of MPI Components
0
connector
connector
Engine control unit connector
TSB Revision
Engine control unit
58
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