|APPLICABILITY:||2000MY and Later Legacy/Outback 2.5L SOHC Vehicles|
|1999MY and Later Impreza and|
|Forester 2.5L SOHC Vehicles|
|SUBJECT:||Ignition Coil and High Tension Cables|
When diagnosing for misfire code(s) P0301, P0302, P0303 and/or P0304 there is the possibility that the ignition coil and/or high tension cables could be the cause. In addition to the information published in the service manual, use the following procedure to check the ignition coil and high tension cables.
Production Line Change
The new style high tension cables have been used in production with the following VINs.
|Model||Starting Vin (approxiMate)|
Step 1) Ignition Coil Inspection
Example of leakage on ignition coil tower.
Step 2) High Tension Cable Inspection
Leakage on cable.
Step 3) Ignition Coil Cleaning Procedure (if carbon track is less than 5mm)
- If there is any evidence of carbon, clean the surface of the ignition coil using a clean, soft rag dampened with water.
- Permit the ignition coil to dry.
- Clean the same area of the ignition coil using a clean soft rag dampened with Isopropyl alcohol.
- Permit the ignition coil to dry. note: Do not insert the high tension cables until the ignition coil is dry.
The high tension cables for Impreza and Forester have changed to a silicone rubber boot which has a shiny appearance. Please note that the part numbers have not changed. The Legacy and Outback high tension cables also have a silicone rubber boot.
New Style (C)
Old Style (ADI)