SFI SYSTEM, Diagnostic DTC:P0351, P0352, P0353, P0354

DESCRIPTION

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

The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The spark of the spark plugs passes from the center electrode to the ground electrodes.

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 the current supplied to the primary coil on and off. 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.

• 

  *a	2 V/DIV.
  *b	20 ms./DIV.

  Reference: Inspection using an oscilloscope.

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 stores a DTC.

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the ignition switch to ON (IG) and turn the GTS on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON (IG) and turn the GTS on.

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

7. Start the engine.

8. Idle the engine for 10 seconds or more.

9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

10. Read the pending DTCs.

    Tech Tips

    
    

    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

12. Input the DTC: P0351, P0352, P0353 or P0354.

13. Check the DTC judgment result.

    GTS Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips

    
    

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - BODY GROUND)

   
   

   1. Disconnect the C5, C6, C7 and C8 No. 1 ignition coil connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C5-4 (GND) - Body ground Always Below 1 Ω C6-4 (GND) - Body ground Always Below 1 Ω C7-4 (GND) - Body ground Always Below 1 Ω C8-4 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 IGNITION COIL)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to No. 1 Ignition Coil)

      Disconnect the No. 1 ignition coil connectors.

   2. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition C5-1 (+B) - C5-4 (GND) Ignition switch ON (IG) 11 to 14 V C6-1 (+B) - C6-4 (GND) Ignition switch ON (IG) 11 to 14 V C7-1 (+B) - C7-4 (GND) Ignition switch ON (IG) 11 to 14 V C8-1 (+B) - C8-4 (GND) Ignition switch ON (IG) 11 to 14 V

   
   

   NG

   CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - NO. 1 INTEGRATION RELAY) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - ECM)

   
   

   1. Disconnect the C5, C6, C7 and C8 No. 1 ignition coil connectors.

   2. Disconnect the C10 ECM connector (for LHD).

   3. Disconnect the C9 ECM connector (for RHD).

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

      Standard Resistance
      for LHD Tester Connection Condition Specified Condition C5-2 (IGF) - C10-102 (IGF1) Always Below 1 Ω C6-2 (IGF) - C10-102 (IGF1) Always Below 1 Ω C7-2 (IGF) - C10-102 (IGF1) Always Below 1 Ω C8-2 (IGF) - C10-102 (IGF1) Always Below 1 Ω C5-3 (IGT1) - C10-57 (IGT1) Always Below 1 Ω C6-3 (IGT2) - C10-56 (IGT2) Always Below 1 Ω C7-3 (IGT3) - C10-55 (IGT3) Always Below 1 Ω C8-3 (IGT4) - C10-54 (IGT4) Always Below 1 Ω C5-3 (IGT1) or C10-57 (IGT1) - Body ground Always 10 kΩ or higher C6-3 (IGT2) or C10-56 (IGT2) - Body ground Always 10 kΩ or higher C7-3 (IGT3) or C10-55 (IGT3) - Body ground Always 10 kΩ or higher C8-3 (IGT4) or C10-54 (IGT4) - Body ground Always 10 kΩ or higher C5-2 (IGF), C6-2 (IGF), C7-2 (IGF), C8-2 (IGF) or C10-102 (IGF1) - Body ground Always 10 kΩ or higher
      for RHD Tester Connection Condition Specified Condition C5-2 (IGF) - C9-102 (IGF1) Always Below 1 Ω C6-2 (IGF) - C9-102 (IGF1) Always Below 1 Ω C7-2 (IGF) - C9-102 (IGF1) Always Below 1 Ω C8-2 (IGF) - C9-102 (IGF1) Always Below 1 Ω C5-3 (IGT1) - C9-57 (IGT1) Always Below 1 Ω C6-3 (IGT2) - C9-56 (IGT2) Always Below 1 Ω C7-3 (IGT3) - C9-55 (IGT3) Always Below 1 Ω C8-3 (IGT4) - C9-54 (IGT4) Always Below 1 Ω C5-3 (IGT1) or C9-57 (IGT1) - Body ground Always 10 kΩ or higher C6-3 (IGT2) or C9-56 (IGT2) - Body ground Always 10 kΩ or higher C7-3 (IGT3) or C9-55 (IGT3) - Body ground Always 10 kΩ or higher C8-3 (IGT4) or C9-54 (IGT4) - Body ground Always 10 kΩ or higher C5-2 (IGF), C6-2 (IGF), C7-2 (IGF), C8-2 (IGF) or C9-102 (IGF1) - 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 GTS to the DLC3.

   2. Turn the ignition switch to ON (IG).

   3. Turn the GTS on.

   4. Clear the DTCs Click here.

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

      Note

      Do not change the location of the connectors.

   6. Perform a simulation test.

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

   8. Read the DTCs.

      Result

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

      Tech Tips

      Perform "Inspection After Repair" after replacing the No. 1 ignition coil Click here.

   
   

   A

   REPLACE ECM Click here

   B

   REPLACE NO. 1 IGNITION COIL Click here

5. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - NO. 1 INTEGRATION RELAY)

   
   

   1. Disconnect the C5, C6, C7 and C8 No. 1 ignition coil connectors.

   2. Remove the No. 1 integration relay from the No. 2 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition C5-1 (+B) - 2D-4 Always Below 1 Ω C6-1 (+B) - 2D-4 Always Below 1 Ω C7-1 (+B) - 2D-4 Always Below 1 Ω C8-1 (+B) - 2D-4 Always Below 1 Ω C5-1 (+B), C6-1 (+B), C7-1 (+B), C8-1 (+B) or 2D-4 - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE NO. 1 INTEGRATION RELAY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR