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 [09/2014 - 11/2017]: Description

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HINT:

These DTCs indicate malfunctions relating to the primary circuit.
If DTC P0351 is output, check the No. 1 ignition coil assembly (No. 1 cylinder) circuit.
If DTC P0352 is output, check the No. 2 ignition coil assembly (No. 2 cylinder) circuit.
If DTC P0353 is output, check the No. 3 ignition coil assembly (No. 3 cylinder) circuit.
If DTC P0354 is output, check the No. 4 ignition coil assembly (No. 4 cylinder) circuit.
If DTC P0355 is output, check the No. 5 ignition coil assembly (No. 5 cylinder) circuit.
If DTC P0356 is output, check the No. 6 ignition coil assembly (No. 6 cylinder) 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 assembly 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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0351	Ignition Coil "A" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF1 or IGT1 circuit between ignition coil assembly and ECM No. 1 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored
P0352	Ignition Coil "B" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF2 or IGT2 circuit between ignition coil assembly and ECM No. 2 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored
P0353	Ignition Coil "C" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF1 or IGT3 circuit between ignition coil assembly and ECM No. 3 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored
P0354	Ignition Coil "D" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF2 or IGT4 circuit between ignition coil assembly and ECM No. 4 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored
P0355	Ignition Coil "E" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF1 or IGT5 circuit between ignition coil assembly and ECM No. 5 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored
P0356	Ignition Coil "F" Primary / Secondary Circuit	No IGF signal to ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF2 or IGT6 circuit between ignition coil assembly and ECM No. 6 ignition coil assembly Semiconductor pwr integration ECU ECM	Comes on	DTC stored

Reference: Inspection using an oscilloscope
HINT:

While idling the engine, check the waveform between terminals IGT (1 to 6) and E1, and IGF1 (2) and E1 of the ECM connectors.

ECM Terminal Name	CH1: IGT1, 3 or 5 and E1 CH2: IGF1 and E1
ECM Terminal Name	CH1: IGT2, 4 or 6 and E1 CH2: IGF2 and E1
Tester Range	2 V/DIV., 20 ms./DIV.
Condition	Idling with warm engine