Check Coil Test-2.4L - Chrysler Stratus RHD 1997 Interactive Electronic Service Manual

8D - 12 IGNITION SYSTEM
DIAGNOSIS AND TESTING (Continued)
(2) Starting with coil insulator #1, remove it from
the DIS coil.
(3) Plug the test spark plug cable onto #1 coil
tower. Make sure a good connection is made; there
should be a click sound.
(4) Crank the engine and look for spark across the
electrodes of the spark plug.
CAUTION: Always install the cable back on the coil
tower after testing to avoid damage to the coil and
catalytic converter.
(5) Repeat the above test for the remaining coils. If
there is no spark during all cylinder tests, proceed to
the Failure To Start Test.
(6) If one or more tests indicate irregular, weak, or
no spark, proceed to Check Coil Test.
TESTING FOR SPARK AT COIL—2.5L
WARNING: THE IGNITION SYSTEM GENERATES
APPROXIMATELY 32,000
INJURY COULD RESULT FROM CONTACT WITH
THIS SYSTEM.
CAUTION: Spark plug wire damage may occur if
the spark plug is moved more than 1/4 inch away
from the engine ground.
CAUTION: Do not leave any one spark plug cable
disconnected any longer than necessary during test
or possible heat damage to catalytic converter will
occur. Total test time must not exceed 1 minute.
Use a new spark plug and spark plug cable for the
following test.
(1) Insert a new spark plug into the new spark
plug boot. Ground the plug to the engine (Fig. 22).
(2) Remove distributor cap. Refer to Distributor
Service in this section.
(3) Plug test spark plug cable onto coil tower.
(4) Crank engine and look for spark across the
electrodes of the spark plug. If there is no spark,
check for: (Fig. 23)
• Continuity from PCM pin 11 to 6-way connector
terminal 1
• Continuity between ground and 6-way connector
terminal 2
• Continuity from PCM pin 6 to 2-way connector
terminal 2
• Correct resistance in distributor cap, refer to
Distributor Cap Resistance Test.
(5) If all circuits show continuity, replace distribu-
tor assembly.
VOLTS. PERSONAL
DISTRIBUTOR 6-WAY CON- BATTERY VOLTAGE CYLINDERS 1 & 4 CYLINDERS 2 & 3 NECTOR
CAV COLOR IGNITION COIL DRIVER FUNCTION
GROUND
CMP SENSOR SIGNAL
FUSED IGN SWITCH OUTPUT
SENSOR GROUND
Fig. 23 Distributor Connectors
CHECK COIL TEST—2.4L
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.
(1) Remove ignition cables and measure the resis-
tance of the cables. Resistance must be within the
range shown in the Cable Resistance Chart in Spec-
ifications. Replace any cable not within tolerance.
(2) Disconnect the electrical connector from the
coil pack.
(3) Measure the primary resistance of each coil. At
the coil, connect an ohmmeter between the B+ pin
and the pin corresponding to the cylinders in ques-
tion (Fig. 24). Resistance on the primary side of each
coil should be 0.45 - 0.65 ohm at (70° to 80° F).
Replace the coil if resistance is not within tolerance.
Fig. 24 Terminal Identification
DISTRIBUTOR 2-WAY CON- NECTOR
CAV COLOR ASD RELAY OUTPUT FUNCTION
JA