Dtc P0351 Ignition Coil A Primary / Secondary Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM)

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

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


DESCRIPTION

HINT:
  1. These DTCs indicate malfunctions relating to the primary circuit.
  2. If DTC P0351 is stored, check the No. 1 ignition coil circuit.
  3. If DTC P0352 is stored, check the No. 2 ignition coil circuit.
  4. If DTC P0353 is stored, check the No. 3 ignition coil circuit.
  5. If DTC P0354 is stored, check the No. 4 ignition coil 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 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0351 Ignition Coil A Primary / Secondary Circuit


DTC No.
DTC Detection Condition
Trouble Area
P0351
P0352
P0353
P0354
No IGF signal is sent to the ECM while the engine is running (ECM does not receive any IGF signals despite the ECM sending an IGT signal to the igniter) (1 trip detection logic).
  1. Ignition system
  2. Open or short in IGF1 or IGT (1 to 4) circuit between ignition coil and ECM
  3. No. 1 to No. 4 ignition coil assemblies
  4. ECM
  1. Reference: Inspection using an oscilloscope.

  2. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0351 Ignition Coil A Primary / Secondary Circuit

    Tester Connection
    		Tool Setting
    		Condition
    		Specified Condition
    C75-17 (IGT1) - C75-3 (E1)
    		2 V/DIV., 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    C75-16 (IGT2) - C75-3 (E1)
    		2 V/DIV., 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    C75-15 (IGT3) - C75-3 (E1)
    		2 V/DIV., 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    C75-14 (IGT4) - C75-3 (E1)
    		2 V/DIV., 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    C75-23 (IGF1) - C75-3 (E1)
    		2 V/DIV., 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    HINT:
    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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection 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.

MONITOR STRATEGY


Required Sensors/Components (Main)
Igniter
Required Sensors/Components (Related)
ECM
Frequency of Operation
Continuous

CONFIRMATION DRIVING PATTERN

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

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0351 Ignition Coil A Primary / Secondary Circuit


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 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0351 Ignition Coil A Primary / Secondary Circuit

  1. Disconnect the ignition coil 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

  1. Turn the ignition switch to ON.

  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
    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 - ECM)

  1. Disconnect the ignition coil 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) - C75-23 (IGF1)
    		Always
    		Below 1 Ω
    C71-2 (IGF) - C75-23 (IGF1)
    		Always
    		Below 1 Ω
    C72-2 (IGF) - C75-23 (IGF1)
    		Always
    		Below 1 Ω
    C73-2 (IGF) - C75-23 (IGF1)
    		Always
    		Below 1 Ω
    C70-3 (IGT1) - C75-17 (IGT1)
    		Always
    		Below 1 Ω
    C71-3 (IGT2) - C75-16 (IGT2)
    		Always
    		Below 1 Ω
    C72-3 (IGT3) - C75-15 (IGT3)
    		Always
    		Below 1 Ω
    C73-3 (IGT4) - C75-14 (IGT4)
    		Always
    		Below 1 Ω
    C70-2 (IGF) or C75-23 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C71-2 (IGF) or C75-23 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C72-2 (IGF) or C75-23 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C73-2 (IGF) or C75-23 (IGF1) - Body ground
    		Always
    		10 kΩ or higher
    C70-3 (IGT1) or C75-17 (IGT1) - Body ground
    		Always
    		10 kΩ or higher
    C71-3 (IGT2) or C75-16 (IGT2) - Body ground
    		Always
    		10 kΩ or higher
    C72-3 (IGT3) or C75-15 (IGT3) - Body ground
    		Always
    		10 kΩ or higher
    C73-3 (IGT4) or C75-14 (IGT4) - 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 OR P0354)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0XSX.html).

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

    NOTICE:
    Do not shuffle the connectors.

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

  1. Check the DTCs output on the intelligent tester.

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


B
REPLACE IGNITION COIL ASSEMBLY (HILUX_TGN26 RM000000SK7015X.html)
A

REPLACE ECM (HILUX_TGN26 RM000000VW202LX.html)