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Camry, Camry Solara Celica, Corolla & ECHO

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  1. 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.
    2. CAUTION: To prevent gasoline from being injected, electrical connectors should be disconnected from fuel injectors. DO NOT crank engine for longer than 5 seconds when checking for spark.
  2. Disconnect electrical connectors at fuel injectors. 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. On Camry and Camry Solara, tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Celica and ECHO, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Corolla, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 62 INCH lbs. (7.0 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. On Camry and Camry Solara, tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Celica and ECHO, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Corolla, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 62 INCH lbs. (7.0 N.m).
  5. Turn ignition on. Using voltmeter, check for battery voltage at ignition coil positive terminal. See IGNITION COIL POSITIVE TERMINAL IDENTIFICATION  table. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring between ignition switch and ignition coil. See WIRING DIAGRAMS article.
    NOTE: On Celica, it may be necessary to check operation of IG2 relay by using wiring diagram. See WIRING DIAGRAMS article. IG2 fuse supplies constant battery voltage to one side of IG2 relay. When ignition is turned on, voltage is supplied from ignition switch to other side of IG2 relay and IG2 relay is then energized. When IG2 relay is energized, IG2 relay provides battery voltage to ignition coils and fuel injectors. IG2 fuse and IG2 relay are located in fuse/relay box at driver's side front corner of engine compartment, just in front of strut tower.
    IGNITION COIL POSITIVE TERMINAL IDENTIFICATION

    Application Wire Color
    Camry & Camry Solara Black/Red
    Celica Black
    Corolla Black/White
    ECHO Black/Red
  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. On Camry and Camry Solara, tighten spark plugs to 14 ft. lbs. (19 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Celica and ECHO, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 80 INCH lbs. (9.0 N.m). On Corolla, install and tighten spark plugs to 13 ft. lbs. (18 N.m) and ignition coil retaining bolts to 62 INCH lbs. (7.0 N.m).
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