Dtc P0351 Ignition Coil A Primary / Secondary Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Gr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355 OR P0356)

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


DESCRIPTION

HINT:
  1. These DTCs indicate malfunctions relating to the primary circuit.
  2. If DTC P0351 is output, check the No. 1 ignition coil assembly circuit.
  3. If DTC P0352 is output, check the No. 2 ignition coil assembly circuit.
  4. If DTC P0353 is output, check the No. 3 ignition coil assembly circuit.
  5. If DTC P0354 is output, check the No. 4 ignition coil assembly circuit.
  6. If DTC P0355 is output, check the No. 5 ignition coil assembly circuit.
  7. If DTC P0356 is output, check the No. 6 ignition coil assembly circuit.
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 sparks of the spark plugs pass 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 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.

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit


DTC Code
DTC Detection Condition
Trouble Area
P0351
P0352
P0353
P0354
P0355
P0356
No IGF signal is sent to the ECM while the engine is running (1 trip detection logic).
  1. Ignition system
  2. Open or short in IGF1 or IGT circuit (1 to 6) between ignition coil assembly and ECM
  3. No. 1 to No. 6 ignition coil assemblies
  4. ECM

  1. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit
  2. Reference: Inspection using an oscilloscope.
  3. While cranking or idling the engine, check the waveform between terminals IGT (1 to 6) and E1, and IGF1 and E1 of the ECM connector.
    Item
    		Content
    Terminal
    		CH1: IGT1, IGT2, IGT3, IGT4, IGT5, IGT6 - E1
    CH2: IGF1 - E1
    Equipment Setting
    		2 V/DIV.
    20 msec./DIV.
    Condition
    		Cranking

MONITOR DESCRIPTION


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit

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.
If the malfunction is not repaired successfully, a DTC is stored 1 second after the engine is next started.

CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to ON and turn the tester 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 and turn the tester on.
  6. Start the engine.
  7. Idle the engine for 10 seconds or more.
  8. Enter the following menus: Powertrain / Engine and ECT / DTC.
  9. Read the pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  11. Input the DTC: P0351, P0352, P0353, P0354, P0355 or P0356.
  12. Check the DTC judgment result.

    Tester Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and the DTC judgment result again.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit

  1. Disconnect the ignition coil assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C70-4 (GND) - Body ground
    		Always
    		Below 1 Ω
    C71-4 (GND) - Body ground
    		Always
    		Below 1 Ω
    C72-4 (GND) - Body ground
    		Always
    		Below 1 Ω
    C73-4 (GND) - Body ground
    		Always
    		Below 1 Ω
    C132-4 (GND) - Body ground
    		Always
    		Below 1 Ω
    C144-4 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C70-1 (+B) - C70-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    C71-1 (+B) - C71-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    C72-1 (+B) - C72-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    C73-1 (+B) - C73-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    C132-1 (+B) - C132-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    C144-1 (+B) - C144-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Ignition Coil Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the ignition coil assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C70-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C71-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C72-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C73-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C132-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C144-2 (IGF) - C129-24 (IGF1)
    		Always
    		Below 1 Ω
    C70-3 (IGT1) - C129-8 (IGT1)
    		Always
    		Below 1 Ω
    C71-3 (IGT2) - C129-9 (IGT2)
    		Always
    		Below 1 Ω
    C72-3 (IGT3) - C129-10 (IGT3)
    		Always
    		Below 1 Ω
    C73-3 (IGT4) - C129-11 (IGT4)
    		Always
    		Below 1 Ω
    C132-3 (IGT5) - C129-12 (IGT5)
    		Always
    		Below 1 Ω
    C144-3 (IGT6) - C129-13 (IGT6)
    		Always
    		Below 1 Ω
    C70-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C71-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C72-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C73-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C132-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C144-2 (IGF) or C129-24 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C70-3 (IGT1) or C129-8 (IGT1) - Body ground
    		Always
    		10 kΩ or higher
    C71-3 (IGT2) or C129-9 (IGT2) - Body ground
    		Always
    		10 kΩ or higher
    C72-3 (IGT3) or C129-10 (IGT3) - Body ground
    		Always
    		10 kΩ or higher
    C73-3 (IGT4) or C129-11 (IGT4) - Body ground
    		Always
    		10 kΩ or higher
    C132-3 (IGT5) or C129-12 (IGT5) - Body ground
    		Always
    		10 kΩ or higher
    C144-3 (IGT6) or C129-13 (IGT6) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355 OR P0356)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X5X.html).

  1. Shuffle arrangement of the ignition coil assemblies (among No. 1 to No. 6 cylinders).

    NOTICE:
    Do not shuffle the connectors.

  1. Perform a simulation test.

  1. Check the output DTCs displayed on the tester.

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


B
REPLACE IGNITION COIL ASSEMBLY (HILUX_TGN26 RM0000015PS00BX.html)
A

REPLACE ECM (HILUX_TGN26 RM000000VW202KX.html)