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Home >> Toyota >> 2000 >> 4Runner Base, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures - 4-Cylinder >> Ignition Systems >> Spark Test >> Tacoma 2.4L 4-Cyl. Except Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Except Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Except Calif. Emission Vehicles

Tacoma 2.4L 4-Cyl. Except Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Except Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Except Calif. Emission Vehicles

  1. Disconnect spark plug wires. Remove spark plugs. Install spark plug on each spark plug wire. Ground spark plug against cylinder block.
    CAUTION: To prevent gasoline from being injected, DO NOT crank engine for longer than 2 seconds when checking for spark.
  2. Crank engine and check for spark. If spark does not exist, 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.
  3. Using ohmmeter, check resistance of spark plug wire. Replace spark plug wire if resistance exceeds 25,000 ohms per wire. If resistance is within specification, go to next step.
  4. Turn ignition on. Using voltmeter, check for battery voltage at ignition coil positive terminal. See appropriate wiring diagram in WIRING DIAGRAMS article. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring between ignition switch and ignition coil.
  5. Check ignition coil resistance. See IGNITION COIL RESISTANCE . If ignition coil resistance is within specification, go to next step. If ignition coil resistance is not within specification, replace ignition coil. See IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  6. Check resistance of camshaft position sensor. See CAMSHAFT POSITION SENSOR RESISTANCE . 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 IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
  7. Check resistance of crankshaft position sensor. See CRANKSHAFT POSITION SENSOR RESISTANCE . 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 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 or P1310 will be set in ECM memory to indicate an ignitor circuit malfunction. See SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION 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 ECM LOCATION  table. 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).
ECM 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 Behind Glove Box
RAV4 Behind Instrument Panel, Near Front Of Center Console
Tacoma & 4Runner Behind Glove Box
(1) For illustration of ECM location, see THEORY & OPERATION article.
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