Mitsubishi MOTORS Eclipse 1997, Service Manual

Page: 396 / 540

Ignition System
ENGINE ELECTRICAL
Engine
Check secondary resis-
tance across coil towers
IGNITION COIL PACK CHECK
Coil one fires cylinders 1 and 4. Coil two fires cylinders 2
and 3. Each coil tower is labeled with the number of the
corresponding cylinder.
Primary Coil Resistance
(1) Disconnect the electrical connector from the coil pack.
(2) Measure the primary resistance of each coil. At the coil,
connect an ohmmeter between the pin and the pin
corresponding to the cylinders in question.
Standard value:
(3) Replace the coil pack if resistance is not the stan-
dard value.
Secondary Coil Resistance
(1) Remove spark plug cables from the secondary
of the coil.
(2) Measure the secondary resistance of the coil
the towers of each individual coil.
Standard value:
(3) Replace the coil pack if resistance is not within the stan-
dard value.
SPARK PLUG CABLE RESISTANCE CHECK
(1) Remove the spark plug cable, attach an ohmmeter lead
to each end, and measure the resistance of the cable.
Limit: max. 8
(2) Replace any cable not within tolerance.
TSB Revision