Chrysler Conquest 1988 Service Manual page 151

IGNITION SYSTEM
- General Information
The ignition timing control device has an ordinary governor and a vacuum timing control unity with timing retard
feature in the distributor to prevent detonation during engine turbocharging: This timing device causes the
timing to be retarded when a positive pressure acts on the diaphragm of the ordinary vacuum advance unit
due to turbocharging.
In order to prevent detonation in high load region for engine protection, a detonation prevention device is also
used. Namely, a detonation sensor detects vibratior, of the mount, and the control circuit in the ignitor detects
detonation and judges its intensity, according to which the curcuit retards the ignition timing to prevent
detonation.
De'tonation sensor
lz ESC ignitor
Retard controller
Ignition
coil
Signal generator
7
lEL156
\ /Distributor