Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
P2302-IGNITION COIL NO. 1 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION (2.4L) DIAGNOSTIC TEST REFERENCE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Check for any related TSBs. Ignition on, engine not running. With the DRBIII®, read DTCs and record the related Freeze Frame data. Is the Good Trip Counter displayed and equal to zero? Yes --> Go To 2 No --> Refer to the INTERMITTENT CONDITION SYMPTOM . Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
ENGINE - 2.4L POWER TECH DOHC I-4 |
| 2 | Turn the ignition off. Disconnect the coil rail harness connector. Ignition on, engine not running. With the DRBIII®, actuate the ASD Relay. Using a 12-volt test light connected to ground, check the (A142) ASD Relay Output circuit at the coil rail harness connector. Does the test light illuminate brightly? Yes --> Go To 3 No --> Repair the open or short to ground in the (A142) ASD Relay Output circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . Stop All Actuations |
ENGINE - 2.4L POWER TECH DOHC I-4 |
| 3 | Turn the ignition off. Disconnect the Ignition Coil harness connector. Using a 12-volt test light connected to 12-volts, probe the Ignition Coil Driver circuit. Crank the engine for 5 second while observing the test light. What is the state of the test light while cranking? Brightly flashing. Replace the Ignition Coil. Perform POWERTRAIN VERIFICATION TEST VER - 5 . ON constantly. Go To 4 OFF constantly. Go To 5 |
ENGINE - 2.4L POWER TECH DOHC I-4 |
| 4 | Turn the ignition off. Disconnect the C2 PCM harness connector. Measure the resistance between the Ignition Coil Driver circuit and ground. Is the resistance below 100 ohms? Yes --> Repair the short to ground in the Ignition Coil Driver circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . No --> Go To 6 |
ENGINE - 2.4L POWER TECH DOHC I-4 |
| 5 | Turn the ignition off. Disconnect the C2 PCM harness connector.
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. Measure the resistance of the Ignition Coil Driver circuit from the Ignition Coil connector to the appropriate terminal of special tool #8815. Is the resistance below 5.0 ohms? Yes --> Go To 6 No --> Repair the open in the Ignition Coil Driver circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
ENGINE - 2.4L POWER TECH DOHC I-4 |
| 6 |
NOTE:
Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.If there are no possible causes remaining, view repair.RepairReplace and program the Powertrain Control Module per Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 5 . |
ENGINE - 2.4L POWER TECH DOHC I-4 |