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.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER)IGNITION SYSTEMSSPARK TESTHIGHLANDER
2004 Toyota Matrix XR, FWD, Standard
Spark Test: Highlander
2004 Toyota Matrix XR, FWD, StandardSECTION Highlander
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- Check for any Diagnostic Trouble Codes (DTC). See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieving of DTCs. If no DTCs exist, go to next step. If any DTCs exist, perform service procedure for DTC.
- Remove No. 2 cylinder head cover located on top of engine, above ignition coils and valve cover. Disconnect electrical connectors at ignition coils located on top of valve cover. Remove retaining bolts and ignition coils from valve cover. Remove spark plugs. Install spark plug on each ignition coil. Reinstall electrical connectors on ignition coils.
- Disconnect electrical connectors at fuel injectors. Ground spark plugs against cylinder block. Crank engine and check for spark. If spark exists only at some spark plugs and not at other spark plugs, go to next step. If spark does not exist at any spark plug, go to step 5. If spark exists at all spark plugs, reinstall components. Tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m).
- Install substitute spark plug for spark plug which did not fire and recheck for spark. If spark now exists, replace original spark plug. If spark still does not exist, replace ignition coil. Reinstall components. Tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m).
- Install substitute spark plugs and recheck for spark. If spark now exists, replace original spark plugs. If spark still does not exist, replace ignition coil that does not produce spark. Reinstall components. Tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m).
CAUTION:
To prevent gasoline from being injected, electrical connectors should be disconnected from fuel injectors. DO NOT crank engine for longer than 2 seconds when checking for spark.
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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.