P0351, P0352, P0353, P0354

DTC Code	DTC Name
P0351	Ignition Coil "A" Primary Control Circuit/Open
P0352	Ignition Coil "B" Primary Control Circuit/Open
P0353	Ignition Coil "C" Primary Control Circuit/Open
P0354	Ignition Coil "D" Primary Control Circuit/Open

DESCRIPTION

Tech Tips

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.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0351	Ignition Coil "A" Primary Control Circuit/Open	DTC Detection Condition Enable Criteria Engine running Malfunction Criteria No IGF signal to ECM while engine is running Diagnostic Mask The MIL will be illuminated if a fault is present for 2 consecutive trips Monitor Continuous Potential failure modes Open or short in IGT1 - IGT4 circuits from ignition coil to ECU Coil failure ECU	Ignition system Open or short in Ignition coil assembly circuit Ignition coil assembly (No. 1 cylinder) ECM	Comes on	DTC stored
P0352	Ignition Coil "B" Primary Control Circuit/Open	DTC Detection Condition Enable Criteria Engine running Malfunction Criteria No IGF signal to ECM while engine is running Diagnostic Mask The MIL will be illuminated if a fault is present for 2 consecutive trips Monitor Continuous Potential failure modes Open or short in IGT1 - IGT4 circuits from ignition coil to ECU Coil failure ECU	Ignition system Open or short in Ignition coil assembly circuit Ignition coil assembly (No. 2 cylinder) ECM	Comes on	DTC stored
P0353	Ignition Coil "C" Primary Control Circuit/Open	DTC Detection Condition Enable Criteria Engine running Malfunction Criteria No IGF signal to ECM while engine is running Diagnostic Mask The MIL will be illuminated if a fault is present for 2 consecutive trips Monitor Continuous Potential failure modes Open or short in IGT1 - IGT4 circuits from ignition coil to ECU Coil failure ECU	Ignition system Open or short in Ignition coil assembly circuit Ignition coil assembly (No. 3 cylinder) ECM	Comes on	DTC stored
P0354	Ignition Coil "D" Primary Control Circuit/Open	DTC Detection Condition Enable Criteria Engine running Malfunction Criteria No IGF signal to ECM while engine is running Diagnostic Mask The MIL will be illuminated if a fault is present for 2 consecutive trips Monitor Continuous Potential failure modes Open or short in IGT1 - IGT4 circuits from ignition coil to ECU Coil failure ECU	Ignition system Open or short in Ignition coil assembly circuit Ignition coil assembly (No. 4 cylinder) ECM	Comes on	DTC stored

*a 2 V/DIV.

*b 20 ms./DIV.

Reference: Inspection using an oscilloscope

*a	2 V/DIV.
*b	20 ms./DIV.

While idling the engine, check the waveform between terminals IGT (1 to 4) and E1, and IGF1 and E1 of the ECM connector.

ECM Terminal Name

CH1: Between IGT (1 to 4) and E1

CH2: Between IGF1 and E1

Tester Range

2 V/DIV., 20 ms./DIV.

Condition

Idling

MONITOR DESCRIPTION

A Direct Ignition System (DIS) is used on the engine. The DIS improves the ignition accuracy, reduces high-voltage loss, and enhances the reliability of the ignition system. The DIS is a 1-cylinder system that ignites one cylinder with one ignition coil. The ECU determines the ignition timing and outputs the ignition signals (IGT) for each cylinder. Based on IGT signals, the power transistor in the igniter cuts off the current to the primary coil, which induces a spark at the spark plug connected to the secondary coil. The igniter will also send an ignition confirmation signal (IGF) as a fail-safe measure to the ECU.

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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Tech Tips

These DTCs indicate malfunctions relating to the primary circuit.
If DTC P0351 is output, check the Ignition coil assembly (No. 1 cylinder) circuit.
If DTC P0352 is output, check the Ignition coil assembly (No. 2 cylinder) circuit.
If DTC P0353 is output, check the Ignition coil assembly (No. 3 cylinder) circuit.
If DTC P0354 is output, check the Ignition coil assembly (No. 4 cylinder) circuit.
Read freeze frame data using the GTS. 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.

PROCEDURE

READ OUTPUT DTC (IN ADDITION TO IGNITION COIL CIRCUIT)

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTC after recording the freeze frame data and DTC.
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) and wait 5 seconds.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Result

Result	Proceed to
DTC P0351, P0352, P0353 and/or P354 is output	A
DTCs are not output	B

B

CHECK FOR INTERMITTENT PROBLEMS Click here

A

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)

Disconnect the B127, B128, B129, and B130 ignition coil assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B127-4 (GND) - Body ground	Always	Below 1 Ω
B128-4 (GND) - Body ground	Always	Below 1 Ω
B129-4 (GND) - Body ground	Always	Below 1 Ω
B130-4 (GND) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL ASSEMBLY)

*a
Front view of wire harness connector

(to Ignition Coil Assembly)

Disconnect the B127, B128, B129, and B130 ignition coil assembly connector.
Turn the engine switch on (IG).

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
B127-1 (+B) - B127-4 (GND)	Engine switch on (IG)	11 to 14 V
B128-1 (+B) - B128-4 (GND)	Engine switch on (IG)	11 to 14 V
B129-1 (+B) - B129-4 (GND)	Engine switch on (IG)	11 to 14 V
B130-1 (+B) - B130-4 (GND)	Engine switch on (IG)	11 to 14 V

Result

Proceed to
OK
NG

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

Disconnect the B127, B128, B129, and B130 ignition coil assembly connector.
Disconnect the B143 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B127-2 (IGF) - B143-13 (IGF1)	Always	Below 1 Ω
B128-2 (IGF) - B143-13 (IGF1)	Always	Below 1 Ω
B129-2 (IGF) - B143-13 (IGF1)	Always	Below 1 Ω
B130-2 (IGF) - B143-13 (IGF1)	Always	Below 1 Ω
B127-3 (IGT1) - B143-27 (IGT1)	Always	Below 1 Ω
B128-3 (IGT2) - B143-19 (IGT2)	Always	Below 1 Ω
B129-3 (IGT3) - B143-11 (IGT3)	Always	Below 1 Ω
B130-3 (IGT4) - B143-3 (IGT4)	Always	Below 1 Ω
B127-2 (IGF) or B143-13 (IGF1) - Body ground and other terminals	Always	10 kΩ or higher
B128-2 (IGF) or B143-13 (IGF1) - Body ground and other terminals	Always	10 kΩ or higher
B129-2 (IGF) or B143-13 (IGF1) - Body ground and other terminals	Always	10 kΩ or higher
B130-2 (IGF) or B143-13 (IGF1) - Body ground and other terminals	Always	10 kΩ or higher
B127-3 (IGT1) or B143-27 (IGT1) - Body ground and other terminals	Always	10 kΩ or higher
B128-3 (IGT2) or B143-19 (IGT2) - Body ground and other terminals	Always	10 kΩ or higher
B129-3 (IGT3) or B143-11 (IGT3) - Body ground and other terminals	Always	10 kΩ or higher
B130-3 (IGT4) or B143-3 (IGT4) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.
Shuffle the arrangement of the ignition coil assemblies (among No. 1 to No. 4 cylinders).

Note

Do not change the location of the connectors.
Perform a simulation test.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Result

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

Tech Tips

Perform "Inspection After Repair" after replacing the ignition coil assembly.

Click here

A

REPLACE ECM Click here

B

REPLACE IGNITION COIL ASSEMBLY Click here

SFI SYSTEM, Diagnostic DTC:P0351, P0352, P0353, P0354