SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 10 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER)IGNITION SYSTEMSSPARK TESTTACOMA
2004 Toyota Celica GT, Standard

Spark Test: Tacoma

2004 Toyota Celica GT, StandardSECTION Tacoma
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.
  1. Remove necessary components for access to ignition coils located on top of valve cover. Disconnect electrical connectors at ignition coils. 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.
    2. CAUTION: To prevent gasoline from being injected, DO NOT crank engine for longer than 2 seconds when checking for spark.
  2. Ground spark plugs against cylinder block. Crank engine and check for spark. Spark test is based on the assumption that spark plugs are okay. If spark does not exist, go to next step. If spark exists, reinstall components. Tighten spark plugs to 15 ft. lbs. (20 N.m) and ignition coil retaining bolts to 66 INCH lbs. (7.5 N.m).
  3. Check ignition coil electrical connections. If electrical connections are okay, go to next step. If electrical connections are defective, repair as necessary and recheck for spark.
  4. Install different ignition coil on spark plug and recheck for spark. If spark still does not exist, go to next step. If spark now exists with different ignition coil, replace original ignition coil. Reinstall components. Tighten spark plugs to 15 ft. lbs. (20 N.m) and ignition coil retaining bolts to 66 INCH lbs. (7.5 N.m).
  5. Turn ignition on. Using voltmeter, check for battery voltage at ignition coil positive terminal (Black/Red wire). If battery voltage exists, go to next step. If battery voltage does not exist, check Black/Red wire between ignition switch and ignition coil. See WIRING DIAGRAMS article.
  6. Check resistance of camshaft position sensor. See CAMSHAFT POSITION SENSOR . If camshaft position sensor resistance is within specification, go to next step. If camshaft position sensor resistance is not within specification, replace camshaft position sensor. See CAMSHAFT POSITION SENSOR under IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  7. Check resistance of crankshaft position sensor. See CRANKSHAFT POSITION SENSOR . If crankshaft position sensor resistance is within specification, go to next step. If crankshaft position sensor resistance is not within specification, replace crankshaft position sensor. See CRANKSHAFT POSITION SENSOR under IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  8. Check ignition IGT signal from Engine Control Module (ECM) to ignition coil. If ignition IGT signal from ECM is defective, Diagnostic Trouble Code (DTC) P1300, P1305, P1310 or P1315 will be set in ECM memory to indicate an ignitor circuit malfunction. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieving of DTCs.
  9. If ignition IGT signal is okay, substitute another ignition coil and recheck system operation. If ignition IGT signal is defective, check wiring between ECM and ignition coil. See ENGINE CONTROL MODULE LOCATION  table. See WIRING DIAGRAMS article. If wiring is defective, repair wiring as necessary and recheck system operation. If wiring is okay, substitute another ECM and recheck system operation. Reinstall components. Tighten spark plugs to 15 ft. lbs. (20 N.m) and ignition coil retaining bolts to 66 INCH lbs. (7.5 N.m).
    ENGINE CONTROL MODULE LOCATION

    Model (1) Location
    Camry & Camry Solara Behind Glove Box
    Celica In Engine Compartment, Below Cover, Just In Front Of Battery, Next To Driver's Side Strut Tower
    Corolla Behind Stereo On Instrument Panel, Just In Front Of Center Console
    ECHO & Highlander Behind Glove Box
    MR2 On Inside Of Firewall, Directly Behind Driver's Seat & Luggage Compartment
    Prius Behind Glove Box
    RAV4 Near Passenger's Side Kick Panel, Just Below Instrument Panel
    Tacoma Behind Glove Box
    (1) For illustration of ECM location, see THEORY & OPERATION article.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.