DTC P0351 IGNITION COIL A PRIMARY/SECONDARY CIRCUIT DTC P0352 IGNITION COIL B PRIMARY/SECONDARY CIRCUIT

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1 DIAGNOSTICS SFI SYSTEM (3MZFE) DTC P035 IGNITION COIL A PIMAY/SECONDAY CICUIT EXE05 DTC P0352 IGNITION COIL B PIMAY/SECONDAY CICUIT DTC P0353 IGNITION COIL C PIMAY/SECONDAY CICUIT DTC P0354 IGNITION COIL D PIMAY/SECONDAY CICUIT DTC P0355 IGNITION COIL E PIMAY/SECONDAY CICUIT DTC P0356 IGNITION COIL F PIMAY/SECONDAY CICUIT HINT: These DTCs indicate a malfunction related to primary circuit. If DTC P035 is displayed, check No. ignition coil with igniter circuit. If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit. If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit. If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit. If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit. If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit. CICUIT DESCIPTION A Direct Ignition System (DIS) is used on this vehicle. The DIS is a cylinder ignition system which ignites one cylinder with one ignition coil. In the cylinder ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode. The determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the IGT, the turns on and off the power transistor inside the igniter, which switches on and off current to the primary coil. When current to the primary coil is cut off, highvoltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the cuts the current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder ignition to the HIGHLANDE EPAI MANUAL (M44U) 73

2 05542 DIAGNOSTICS SFI SYSTEM (3MZFE) From Battery Igniter IGT No. with Igniter Crankshaft Position Sensor IGF IGT2 No. 2 Ignition Coil with Igniter No. Cylinder Spark Plug No. 2 Cylinder VVT Sensor IGT3 No. 3 Ignition Coil with Igniter No. 3 Cylinder IGT4 No. 4 Ignition Coil with Igniter No. 4 Cylinder Other Sensors ECT Sensor MAF Meter Throttle Position Sensor Others IGT5 No. 5 Ignition Coil with Igniter No. 5 Cylinder IGT6 No. 6 Ignition Coil with Igniter No. 6 Cylinder TACH To Tachometer A82677 DTC No. DTC Detection Condition Trouble Area P035 P0352 P0353 P0354 P0355 P0356 No IGF signal to while engine is running ( trip detection logic) Ignition system Open or short in IGF and IGT circuits ( through 6) from ignition coil assy to Ignition coil assy (No. through No. 6) 2005 HIGHLANDE EPAI MANUAL (M44U) 732

3 DIAGNOSTICS SFI SYSTEM (3MZFE) MONITO DESCIPTION with Igniter IGT IGF Igniter Ignition Signal (IGT) Ignition Confirmation Signal (IGF) Normal Malfunction Circuit Open time A82388 If the does not receive the IGF after sending the IGT, it interprets this as a fault in the igniter and sets a DTC. MONITO STATEGY elated DTCs equired sensors / components (Main) equired sensors / components (elated) Frequency of operation Duration MIL operation Sequence operation TYPICAL ENABLING CONDITIONS The monitor will run whenever these DTCs are not present See page Either of the following conditions is met: Condition or 2. Engine PM,500 rpm or less 2. Starter OFF TYPICAL MALFUNCTION THESHOLDS IGF signal P035: Igniter (Cylinder ) malfunction P0352: Igniter (Cylinder 2) malfunction P0353: Igniter (Cylinder 3) malfunction P0354: Igniter (Cylinder 4) malfunction P0355: Igniter (Cylinder 5) malfunction P0356: Igniter (Cylinder 6) malfunction Igniter CKP sensor Continuous seconds + 6 sparks Immediate None does not detect IGF signal from igniter when sends IGT signal to igniter 2005 HIGHLANDE EPAI MANUAL (M44U) 733

4 05544 Y 7 IC I5 Ignition Switch AM2 IG2 IG2 6 G Instrument Panel J/B Assy C G 4 C B LY 0 AM2 W B F7 FL Block Assy 2 EB FL Main Battery 6 F B N Noise Filter O IC3 EC DIAGNOSTICS COMPONENT OPEATING ANGE IGF signal WIING DIAGAM I2 Assy No. 4 +B IGT 3 W 2 I3 Assy No B IGT 3 2 I4 Assy No B IGT 3 W 2 I5 Assy No. 4 +B IGT 3 W 4 2 I6 Assy No. 5 +B IGT W 3 W 4 2 I7 Assy No. 6 +B IGT SFI SYSTEM (3MZFE) Igniter outputs IGF signal when it receives IGT signal from L 4 4 W W S28 S29 Short Connector W W W W W P YB LY GY L B A J7 J/C A B ED IGT IGF IGT2 IGT3 IGT4 IGT5 IGT6 E A HIGHLANDE EPAI MANUAL (M44U) 734

5 DIAGNOSTICS SFI SYSTEM (3MZFE) INSPECTION POCEDUE HINT: ead freeze frame data using the hand held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the airfuel ratio was lean or rich, and other data from the time the malfunction occurred. CHECK SPAK PLUG AND SPAK OF MISFIING CYLINDE (See page 89 ) : Spark occurs. NG Go to step 4 2 CHECK WIE HANESS (IGNITION COIL ASSY (IGF TEMINAL) Wire Harness Side I2 I3 I4 I5 I6 I7 IGF Disconnect the connector. Check the resistance of the wire harness side connectors. I22 24 (IGF) I32 24 (IGF) I42 24 (IGF) I52 24 (IGF) I62 24 (IGF) I72 24 (IGF) I22 or 24 (IGF) Body ground I32 or 24 (IGF) Body ground I42 or 24 (IGF) Body ground I52 or 24 (IGF) Body ground I62 or 24 (IGF) Body ground I72 or 24 (IGF) Body ground Below Ω 0 kω or higher Y A54393 A8699 A85848 NG EPAI O EPLACE HANESS AND CONNECTO 2005 HIGHLANDE EPAI MANUAL (M44U) 735

6 05546 DIAGNOSTICS SFI SYSTEM (3MZFE) 3 CHECK (IGF VOLTAGE) IGF (+) E () Turn the ignition switch ON. Measure the voltage between the terminals of the connectors. A (IGF) (E) 4.5 to 5.5 V HINT: eference: Inspection using the oscilloscope. During cranking or idling, check the waveform of the connectors. IGF E () 24 (IGF) (E) Correct waveform is as shown IGF Signal Waveform 2 V/ Division CH2 20 msec./division GND A88572 NG EPLACE (See page 024 ) EPLACE IGNITION COIL ASSY 2005 HIGHLANDE EPAI MANUAL (M44U) 736

7 DIAGNOSTICS SFI SYSTEM (3MZFE) CHECK WIE HANESS (IGNITION COIL ASSY (IGT TEMINAL)) Wire Harness Side I2 I3 I4 I5 I6 I7 IGT6 Y A54393 A8699 IGT5 IGT IGT2 IGT3 IGT4 A85848 Disconnect the connector. Check the resistance of the wire harness side connectors. I23 8 (IGT) I33 9 (IGT2) I43 0 (IGT3) I53 (IGT4) I63 2 (IGT5) I73 3 (IGT6) I23 or 8 (IGT) Body ground I33 or 9 (IGT2) Body ground I43 or 0 (IGT3) Body ground I53 or (IGT4) Body ground I63 or 2 (IGT5) Body ground I73 or 3 (IGT6) Body ground Below Ω 0 kω or higher NG EPAI O EPLACE HANESS AND CONNECTO 2005 HIGHLANDE EPAI MANUAL (M44U) 737

8 05548 DIAGNOSTICS SFI SYSTEM (3MZFE) 5 CHECK (IGT, IGT2, IGT3, IGT4, IGT5 O IGT6 VOLTAGE) IGT5 (+) IGT 6 (+) IGT4 (+) IGT3 (+) IGT (+) IGT2 (+) E () A76903 Check the voltage of the connectors when the engine is cranked. 8 (GT) (E) 9 (IGT2) (E) 0 (IGT3) (E) (IGT4) (E) 2 (IGT5) (E) 3 (IGT6) (E) More than 0. V or less than 4.5 V IGT5 (+) IGT3 (+) IGT 6 (+) IGT4 (+) IGT (+) IGT2 (+) IGT Signal Waveform E () IGT5 (+) IGT3 (+) IGT 6 (+) IGT4 (+) IGT (+) IGT2 (+) CH E () A V/ Division GND Check the voltage of the connectors when the engine is cranked. 8 (IGT) (E) 9 (IGT2) (E) 0 (IGT3) (E) (IGT4) (E) 2 (IGT5) (E) 3 (IGT6) (E) 4.5 V or more HINT: eference: Inspection using the oscilloscope. During cranking or idling, check the waveform of the connectors. 8 (GT) (E) 9 (IGT2) (E) 0 (IGT3) (E) (IGT4) (E) 2 (IGT5) (E) 3 (IGT6) (E) Correct waveform is as shown 20 msec./division A88572 NG EPLACE 2005 HIGHLANDE EPAI MANUAL (M44U) 738

9 DIAGNOSTICS SFI SYSTEM (3MZFE) INSPECT IGNITION COIL ASSY (POWE SOUCE) Wire Harness Side I2 I3 I4 I5 I6 I7 A54393 Turn the ignition switch ON. Check the voltage of the wire harness side connector. I2 Body ground I3 Body ground I4 Body ground I5 Body ground I6 Body ground I7 Body ground 9 to 4 V EPLACE IGNITION COIL ASSY NG 2005 HIGHLANDE EPAI MANUAL (M44U) 739

10 05550 DIAGNOSTICS SFI SYSTEM (3MZFE) 7 CHECK WIE HANESS (IGNITION COIL ASSY IGNITION SWITCH) Wire Harness Side Instrument Panel J/B Assy IG2 Fuse (d) Check the IG2 fuse. () emove the IG2 fuse from the instrument panel J/B assy. (2) Check for resistance of the IG2 fuse. Below Ω Disconnect the II5 ignition switch connector. Check the resistance of the wire harness side connectors. I2 I3 I4 I5 I6 I7 I5 Ignition Switch I2 I56 (IG2) I3 I56 (IG2) I4 I56 (IG2) I5 I56 (IG2) I6 I56 (IG2) I7 I56 (IG2) I2 or I56 (IG2) Body ground I3 or I56 (IG2) Body ground I4 or I56 (IG2) Body ground I5 or I56 (IG2) Body ground I6 or I56 (IG2) Body ground I7 or I56 (IG2) Body ground Below Ω 0 kω or higher IG2 A92540 NG EPAI O EPLACE HANESS AND CONNECTO EPLACE IGNITION COIL ASSY 2005 HIGHLANDE EPAI MANUAL (M44U) 740