SFI SYSTEM (w/ EGR System), Diagnostic DTC:P0351, P0352, P0353, P0354

DESCRIPTION

A Direct Ignition System (DIS) is used on this vehicle.

The DIS is an ignition system in which each cylinder is ignited by it's own ignition coil assembly and spark plug. The secondary wiring of each ignition coil generates a powerful voltage which is applied directly to each spark plug. The spark passes from the center electrode of the spark plug to the ground electrode.

The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, switches on and off the current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.

• 

  Reference: Inspection using an oscilloscope.

  Standard

  Tester Connection Tool Setting Condition Specified Condition D27-108 (IGT1) - D27-104 (E1) 2 V/DIV., 20 ms./DIV. Idling The correct waveform is as shown D27-107 (IGT2) - D27-104 (E1) 2 V/DIV., 20 ms./DIV. Idling The correct waveform is as shown D27-106 (IGT3) - D27-104 (E1) 2 V/DIV., 20 ms./DIV. Idling The correct waveform is as shown D27-105 (IGT4) - D27-104 (E1) 2 V/DIV., 20 ms./DIV. Idling The correct waveform is as shown D27-23 (IGF1) - D27-104 (E1) 2 V/DIV., 20 ms./DIV. Idling The correct waveform is as shown

• While cranking or idling the engine, check the waveform between terminals IGT (1 to 4) and E1, and IGF1 and E1 of the ECM connector.

MONITOR DESCRIPTION

If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and sets a DTC.

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

1. Put the engine in inspection mode (maintenance mode) Click here.

2. Start the engine and run it at idle for 10 seconds or more.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Ignition Coil Assembly)

      Disconnect the ignition coil assembly connectors.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition D22-4 (GND) - Body ground Always Below 1 Ω D21-4 (GND) - Body ground Always Below 1 Ω D20-4 (GND) - Body ground Always Below 1 Ω D19-4 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Ignition Coil Assembly)

      Disconnect the ignition coil assembly connectors.

   2. Turn the power switch on (IG).

   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition D22-1 (+B) - D22-4 (GND) Power switch on (IG) 11 to 14 V D21-1 (+B) - D21-4 (GND) Power switch on (IG) 11 to 14 V D20-1 (+B) - D20-4 (GND) Power switch on (IG) 11 to 14 V D19-1 (+B) - D19-4 (GND) Power switch on (IG) 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IG2 RELAY)

   OK

3. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

   
   

   1. Disconnect the ignition coil assembly connectors.

   2. Disconnect the ECM connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition D22-2 (IGF) - D27-23 (IGF1) Always Below 1 Ω D21-2 (IGF) - D27-23 (IGF1) Always Below 1 Ω D20-2 (IGF) - D27-23 (IGF1) Always Below 1 Ω D19-2 (IGF) - D27-23 (IGF1) Always Below 1 Ω D22-3 (IGT1) - D27-108 (IGT1) Always Below 1 Ω D21-3 (IGT2) - D27-107 (IGT2) Always Below 1 Ω D20-3 (IGT3) - D27-106 (IGT3) Always Below 1 Ω D19-3 (IGT4) - D27-105 (IGT4) Always Below 1 Ω D22-2 (IGF) or D27-23 (IGF1) - Body ground Always 10 kΩ or higher D21-2 (IGF) or D27-23 (IGF1) - Body ground Always 10 kΩ or higher D20-2 (IGF) or D27-23 (IGF1) - Body ground Always 10 kΩ or higher D19-2 (IGF) or D27-23 (IGF1) - Body ground Always 10 kΩ or higher D22-3 (IGT1) or D27-108 (IGT1) - Body ground Always 10 kΩ or higher D21-3 (IGT2) or D27-107 (IGT2) - Body ground Always 10 kΩ or higher D20-3 (IGT3) or D27-106 (IGT3) - Body ground Always 10 kΩ or higher D19-3 (IGT4) or D27-105 (IGT4) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the tester on.

   4. Clear the DTCs Click here.

   5. Shuffle arrangement of the ignition coil assemblies (among No. 1 to No. 4 cylinders).

      Note

      Do not shuffle the connectors.

   6. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

   7. Enter the following menus: Powertrain / Engine and ECT / DTC.

   8. Read the DTCs.

      Result

      Result	Proceed to
      Same DTC output	A
      Different ignition coil DTC output	B

   
   

   B

   REPLACE IGNITION COIL ASSEMBLY Click here

   A

   REPLACE ECM Click here