Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Isolate EDIS Module/Pip Fault (NAVAJO)
With key off, disconnect ECA. Connect LED test light leads between breakout box pins No. J43 (PIP E) and J7 (ground). Crank engine. If LED test light blinks, replace ECA. If test light does not blink, check PIP for short to ground or power. Repair any problems found. If no problems are found, replace EDIS module.
Checking Plugs & Wires Crank engine. Using a high-output spark tester, check for spark at both spark plug wires of each coil. If no spark at all coils, go to CHECK FOR VBAT TO EDIS MODULE (NAVAJO). If spark is missing from both spark plug wires of one or 2 coils, go to CHECK VBAT OPEN TO COIL (NAVAJO). If spark is missing from one wire, replace spark plug wire and spark plug. Recheck ignition system.
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Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.