Town & Country V6-3.8L (2009)
4. With the scan tool, actuate the Main/ASD Relay to on.
5. Using a 12 volt test light connected to ground, check the Main/ASD Relay output circuit in the ignition coil harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright during the actuation?
Yes
-
Go To 4
No
-
Repair the Main/ASD Relay output circuit for an open circuit or high resistance.
-
Perform the PCM Verification Test. See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated
Procedures/Verification Tests/PCM Verification Test.
4. IGNITION COIL
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not
wear loose clothing. Failure to follow these instructions can result in personal injury or death.
1. Using a 12 volt test light connected to 12 volts, check the Ignition Coil control circuit for the cylinder being tested in the Ignition Coil harness
connector.
2. Crank the engine for 5 seconds.
NOTE: The test light should blink each time the circuit is activated by the PCM.
Does the test light blink each time the circuit is activated by the PCM?
Yes
-
Replace the Ignition Coil.
-
Perform the PCM Verification Test. See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated
Procedures/Verification Tests/PCM Verification Test.
No
-
Go To 5
5. IGNITION COIL CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in
poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
1. Measure the resistance of the Ignition Coil control circuit for the cylinder being tested between the Ignition Coil harness connector and the
appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes
-
Go To 6
No
-
Repair the Ignition Coil control circuit for an open circuit or high resistance.
-
Perform the PCM Verification Test. See: Computers and Control Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated
Procedures/Verification Tests/PCM Verification Test.
6. POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Ignition Coil for the cylinder being tested and the
PCM.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Search for any Technical Service Bulletins that may apply.
