Dtc P0351 Ignition Coil A Primary / Secondary Circuit

Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40

DESCRIPTION

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 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 set, check the ignition No. 1 coil circuit.
  3. If DTC P0352 is set, check the ignition No. 2 coil circuit.
  4. If DTC P0353 is set, check the ignition No. 3 coil circuit.
  5. If DTC P0354 is set, check the ignition No. 4 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 off, the igniter sends back an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.

Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit


DTC No.
DTC Detection Condition
Trouble Area
P0351
P0352
P0353
P0354
No IGF signal to ECM while engine running
(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. Ignition No. 1 to No. 4 coils
  4. ECM

  1. Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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 4) and E1, and IGF1 and E1 of the ECM connector.
    Item
    		Content
    Terminals
    		CH1: IGT1, IGT2, IGT3, IGT4 - E1
    CH2: IGF1 - E1
    Equipment Settings
    		2 V/DIV.
    20 ms./DIV.
    Conditions
    		Cranking or idling

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit


Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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)


    Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit

  1. Disconnect the C11 to C14 ignition coil connectors.

  1. Measure the resistance between the terminals of the wire harness side connectors.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    GND (C11-4) - Body ground
    		Below 1 Ω
    GND (C13-4) - Body ground
    GND (C12-4) - Body ground
    GND (C14-4) - Body ground

  1. Turn the ignition switch to the ON position.

  1. Measure the voltage between the terminals of the wire harness side connectors.

    Standard voltage:
    Tester Connection
    		Specified Condition
    +B (C11-1) - GND (C11-4)
    		9 to 14 V
    +B (C13-1) - GND (C13-4)
    +B (C12-1) - GND (C12-4)
    +B (C14-1) - GND (C14-4)

  1. Reconnect the ignition coil connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System. Dtc P0351 Ignition Coil A Primary / Secondary Circuit

  1. Disconnect the C11 to C14 ignition coil connectors.

  1. Disconnect the C24 ECM connector.

  1. Measure the resistance between the terminals of the wire harness side connectors.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    IGF (C11-2) - IGF1 (C24-81)
    		Below 1 Ω
    IGF (C13-2) - IGF1 (C24-81)
    IGF (C12-2) - IGF1 (C24-81)
    IGF (C14-2) - IGF1 (C24-81)
    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    IGT1 (C11-3) - IGT1 (C24-85)
    		Below 1 Ω
    IGT2 (C13-3) - IGT2 (C24-84)
    IGT3 (C12-3) - IGT3 (C24-83)
    IGT4 (C14-3) - IGT4 (C24-82)
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    IGF (C11-2) or IGF1 (C24-81) - Body ground
    		10 kΩ or higher
    IGF (C13-2) or IGF1 (C24-81) - Body ground
    IGF (C12-2) or IGF1 (C24-81) - Body ground
    IGF (C14-2) or IGF1 (C24-81) - Body ground
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    IGT1 (C11-3) or IGT1 (C24-85) - Body ground
    		10 kΩ or higher
    IGT2 (C13-3) or IGT2 (C24-84) - Body ground
    IGT3 (C12-3) or IGT3 (C24-83) - Body ground
    IGT4 (C14-3) or IGT4 (C24-82) - Body ground

  1. Reconnect the ECM connector.

  1. Reconnect the ignition coil connectors.



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 the ON position and turn the tester on.

  1. Clear the DTCs (CAMRY_ACV40 RM000000PDK0D5X.html).

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

    NOTICE:
    Do not shuffle the connectors.

  1. Perform a simulation test.

  1. Check the DTCs displayed on the tester.

    Result:
    Display (DTC Output)
    		Proceed to
    Same DTC output
    		A
    Different ignition coil DTC output
    		B


B
REPLACE IGNITION COIL ASSEMBLY
A

REPLACE ECM