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
DTC P0355 IGNITION COIL "E" PRIMARY/SECONDARY CIRCUIT
DTC P0356 IGNITION COIL "F" PRIMARY/SECONDARY CIRCUIT
DTC P0357 IGNITION COIL "G" PRIMARY/SECONDARY CIRCUIT
DTC P0358 IGNITION COIL "H" PRIMARY/SECONDARY CIRCUIT

HINT: These DTCs indicate a malfunction related to primary circuit.
- If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.
- If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
- If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
- If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
- If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.
- If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.
- If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.
- If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.

CIRCUIT DESCRIPTION

DTC Detection Condition:

A Direct Ignition System (DIS) is used on this vehicle. The DIS improves the ignition timing accuracy, reduces high-voltage loss, and does not require a distributor, which enhances the overall reliability of the ignition system.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the IGT, the ECM turns on and off the power transistor inside the igniter, which switches on and off current to the primary coil. When current to the primary coil is cut off, high-voltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder ignition to the ECM.

Oscilloscope Waveform:

Reference: The waveform of IGT and IGF signal
During the engine idling, check the waveform between terminals IGT1 to IGT8 and E1, and IF1L, IF2L, IF1R or IF2R and E1 of the E2, E3 and E4 ECM connectors.

HINT: The wavelength becomes shorter as engine RPM increases.
a. Igniter IGT signal (from ECM to igniter)
b. Igniter IGF signal (from igniter to ECM)

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

If the ECM does not receive the IGF signal after sending the IGT signal, the ECM interprets this as a fault in the igniter and sets a DTC.

Wiring Diagram:

Step 1-2:

Step 3-4:

Step 5-6:

Step 7-8:

Step 9:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.