Mitsubishi Stealth 1994 Import Service Manual page 554

MULTIPORT FUEL INJECTION -
KNOCK SENSOR <DOHC>
OPERATION
The knock sensor generates a voltage proportional to the magnitude of cylinder block vibration due to
knocking and inputs it to the engine control module. Based on this signal, the engine control module provides
retard control of the ignition timing.
TROUBLESHOOTING HINTS
When knocking occurs while driving under I-
addition to the knock sensor itself.
(1) Inappropriate ignition plug heat range
(2) Inappropriate gasoline
(3) Incorrectly adjusted reference ignition timing
On-Vehicle Inspection of MFI Components
Engine control module
connector
l
2
Knock sensor
connector
Engine control module connector