Engine Ignition System: Diagnosis Toyota Sienna II рестайлинг

ON-VEHICLE INSPECTION

Note. In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10°C (14°F) to 50°C (122°F). "Hot" means approximately 50°C (122°F) to 100°C (212°F).

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1. INSPECT IGNITION COIL ASSEMBLY Check for DTCs. NOTE: If any DTC is present, perform troubleshooting in accordance with the procedures for that DTC. Remove the ignition coil assembly and spark plug. (See «REMOVAL»(ref-282119-S03184814892008032900000) ). Check that sparks occur. Disconnect the 6 fuel injector connectors. Install the spark plugs to each ignition coil, and connect the ignition coil connectors. Ground the spark plugs. Check if a spark occurs at each spark plug while the engine is being cranked. NOTE: Be sure to ground the spark plugs when checking. Replace the ignition coil if it receives an impact. Do not crank the engine for more than 2 seconds. Perform the spark test according to the flowchart below. Check that the ignition coil connector is securely connected. Result RESULT CHART Result Proceed to NG Connect securely OK Go to next step Perform a spark test on each ignition coil. Replace the ignition coil with a normal one. Perform the spark test again. Result RESULT CHART Result Proceed to NG Go to next step OK Replace ignition coil Check the spark plug (See «ON-VEHICLE INSPECTION»(ref-282118-S18909792052008032900000) ). Result RESULT CHART Result Proceed to NG Replace spark plug OK Go to next step Check the power supply to the ignition coil. Turn the ignition switch to the ON position. Check that there is battery voltage at the ignition coil positive (+) terminal. Result RESULT CHART Result Proceed to NG Check wiring between ignition switch and ignition coil OK Go to next step Measure the resistance of the crankshaft position sensor (See «REMOVAL»(ref-282129-S19590954422008032900000) ). Result RESULT CHART Result Proceed to NG Replace crankshaft position sensor OK Go to next step Check the IGT signal from the ECM (See «DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT; DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT; DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT; DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT; DTC P0355 IGNITION COIL "E" PRIMARY / SECONDARY CIRCUIT; DTC P0356 IGNITION COIL "F" PRIMARY / SECONDARY CIRCUIT»(ref-282129-S23156081132008032900000) ) Result RESULT CHART Result Proceed to NG Check ECM OK Repair wiring between ignition coil and ECM Using a 16 mm (0.63 in.) plug wrench, install the spark plugs. Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf) Connect the 6 fuel injector connectors. Install the ignition coil assembly (See «INSTALLATION»(ref-282119-S32071170262008032900000) ).
2. INSPECT SPARK PLUG NOTE: Never use a wire brush for cleaning. Never attempt to adjust the electrode gap on a used spark plug. Check the electrode. Using a megohmmeter, measure the insulation resistance. Standard insulation resistance: 10 Mohms or higher HINT: If the result is 10 Mohms or less, clean the plug and measure the resistance again. If a megohmmeter is not available, perform the following simple inspection instead. Alternative inspection method: Quickly accelerate the engine to 4000 rpm 5 times. Remove the spark plugs. Visually check the spark plug. If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step. Check the spark plug for any damage to its threads and insulator. If there is damage, replace the spark plug. Recommended spark plug SPARK PLUG SPECIFICATION Manufacturer Spark Plug Type DENSO FK20HR11 NOTE: Use only the listed spark plug or equivalent to ensure engine performance and smooth driveability. Check the spark plug electrode gap. Maximum electrode gap for used spark plug: 1.4 mm (0.055 in.) If the gap is greater than the maximum, replace the spark plug. Electrode gap for new spark plug: 1.0 to 1.1 mm (0.039 to 0.043 in.) Clean the spark plugs. If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it. Standard air pressure: 588 kPa (6 kgf*cm 2 , 85 psi) Standard duration: 20 seconds or less HINT: Only use the spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner. Install the ignition coil assembly and spark plug. (See «INSTALLATION»(ref-282119-S32071170262008032900000) ).

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1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. DRAIN ENGINE COOLANT
3. REMOVE FRONT WIPER ARM HEAD CAP (See «REMOVAL»(ref-282135-S06482974872008032900000) )
4. REMOVE FRONT WIPER ARM RH (See «REMOVAL»(ref-282135-S06482974872008032900000) )
5. REMOVE FRONT WIPER ARM LH (See «REMOVAL»(ref-282135-S06482974872008032900000) )
6. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY (See «REMOVAL»(ref-282135-S06482974872008032900000) )
7. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY (See «REMOVAL»(ref-282135-S06482974872008032900000) )
8. REMOVE NO. 1 COWL TOP TO COWL BRACE INNER (See «REMOVAL»(ref-282130-S04614499162008032900000) )
9. REMOVE COWL TOP PANEL SUB-ASSEMBLY OUTER FRONT (See «REMOVAL»(ref-282130-S04614499162008032900000) )
10. REMOVE NO. 1 ENGINE UNDER COVER
11. REMOVE V-BANK COVER SUB-ASSEMBLY (See «REMOVAL»(ref-282118-S19305882932008032900000) )
12. REMOVE AIR CLEANER CAP SUB-ASSEMBLY (See «REMOVAL»(ref-282130-S04614499162008032900000) )
13. REMOVE INTAKE AIR SURGE TANK ASSEMBLY (See «REMOVAL»(ref-282130-S04614499162008032900000) )
14. REMOVE NO. 1 SURGE TANK STAY Remove the 2 bolts and nut and disconnect the 2 harness clamps. Remove the bolt and No. 1 surge tank stay.
15. REMOVE IGNITION COIL ASSEMBLY Disconnect the 6 ignition coil connectors. Remove the 6 bolts and 6 ignition coils.
16. REMOVE SPARK PLUG Remove the 6 spark plugs.