DTC P0351-13: Ignition Coil "A" Circuit Open; DTC P0352-13: Ignition Coil "B" Circuit Open; DTC P0353-13: Ignition Coil "C" Circuit Open; DTC P0354-13: Ignition Coil "D" Circuit Open; DTC P0355-13: Ignition Coil "E" Circuit Open; DTC P0356-13: Ignition Coil "F" Circuit Open [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

These DTCs indicate malfunctions relating to the primary circuit.
If DTC P0351-13 is output, check the No. 1 ignition coil assembly circuit.
If DTC P0352-13 is output, check the No. 2 ignition coil assembly circuit.
If DTC P0353-13 is output, check the No. 3 ignition coil assembly circuit.
If DTC P0354-13 is output, check the No. 4 ignition coil assembly circuit.
If DTC P0355-13 is output, check the No. 5 ignition coil assembly circuit.
If DTC P0356-13 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 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	DTC Output from	Priority	Note
P0351-13	Ignition Coil "A" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF1 or IGT1 circuit between ignition coil assembly and ECM No. 1 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0351
P0352-13	Ignition Coil "B" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF2 or IGT2 circuit between ignition coil assembly and ECM No. 2 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0352
P0353-13	Ignition Coil "C" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF1 or IGT3 circuit between ignition coil assembly and ECM No. 3 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0353
P0354-13	Ignition Coil "D" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF2 or IGT4 circuit between ignition coil assembly and ECM No. 4 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0354
P0355-13	Ignition Coil "E" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF1 or IGT5 circuit between ignition coil assembly and ECM No. 5 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0355
P0356-13	Ignition Coil "F" Circuit Open	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Open or short in IGF2 or IGT6 circuit between ignition coil assembly and ECM No. 6 ignition coil assembly IGP NO. 1 relay ECM	Comes on	Engine	A	SAE Code: P0356

Reference: Inspection using an oscilloscope.

Fig 1: Waveform 1

HINT:

The correct waveform is as shown.

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

ECM Terminal Name	CH1: Between IGT (1 to 6) and E1 CH2: Between IGF (1 or 2) and E1
Tester Range	2 V/DIV., 20 ms./DIV.
Condition	Idling with warm engine