P0351, P0352, P0353, P0354

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

DESCRIPTION

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.

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.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0351	Ignition Coil "A" Primary / Secondary Circuit	No IGF signal to the 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 ECM	Comes on	DTC stored
P0352	Ignition Coil "B" Primary / Secondary Circuit	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF1 or IGT2 circuit between ignition coil assembly and ECM No. 2 ignition coil assembly ECM	Comes on	DTC stored
P0353	Ignition Coil "C" Primary / Secondary Circuit	No IGF signal to the 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 ECM	Comes on	DTC stored
P0354	Ignition Coil "D" Primary / Secondary Circuit	No IGF signal to the ECM while the engine is running (1 trip detection logic).	Ignition system Open or short in IGF1 or IGT4 circuit between ignition coil assembly and ECM No. 4 ignition coil assembly ECM	Comes on	DTC stored

Reference: Inspection using an oscilloscope.

*a 2 V/DIV.

*b 20 ms./DIV.

*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

IGT: Between IGT (1 to 4) and E1

IGF: Between IGF1 and E1

Tester Range

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

Condition

Idling

MONITOR DESCRIPTION

If the ECM does not receive any IGF1 signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main)	Igniter
Required Sensors/Components (Related)	Crankshaft position sensor
Frequency of Operation	Continuous

CONFIRMATION DRIVING PATTERN

Start the engine and run it at idle for 10 seconds or more.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

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

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

Disconnect the ignition coil assembly connectors.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B12-4 (GND) - Body ground	Always	Below 1 Ω
B11-4 (GND) - Body ground	Always	Below 1 Ω
B10-4 (GND) - Body ground	Always	Below 1 Ω
B9-4 (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 ignition coil assembly connectors.
Turn the ignition switch to ON.

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
B12-1 (+B) - B12-4 (GND)	Ignition switch ON	11 to 14 V
B11-1 (+B) - B11-4 (GND)	Ignition switch ON	11 to 14 V
B10-1 (+B) - B10-4 (GND)	Ignition switch ON	11 to 14 V
B9-1 (+B) - B9-4 (GND)	Ignition switch ON	11 to 14 V

Result

Proceed to
OK
NG

NG

CHECK HARNESS AND CONNECTOR (IG2 RELAY - IGNITION COIL ASSEMBLY) Click here

OK

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

Disconnect the ignition coil assembly connectors.
Disconnect the ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B12-2 (IGF) - B77-51 (IGF1)	Always	Below 1 Ω
B11-2 (IGF) - B77-51 (IGF1)	Always	Below 1 Ω
B10-2 (IGF) - B77-51 (IGF1)	Always	Below 1 Ω
B9-2 (IGF) - B77-51 (IGF1)	Always	Below 1 Ω
B12-3 (IGT1) - B77-57 (IGT1)	Always	Below 1 Ω
B11-3 (IGT2) - B77-56 (IGT2)	Always	Below 1 Ω
B10-3 (IGT3) - B77-55 (IGT3)	Always	Below 1 Ω
B9-3 (IGT4) - B77-54 (IGT4)	Always	Below 1 Ω
B12-3 (IGT1) or B77-57 (IGT1) - Body ground	Always	10 kΩ or higher
B11-3 (IGT2) or B77-56 (IGT2) - Body ground	Always	10 kΩ or higher
B10-3 (IGT3) or B77-55 (IGT3) - Body ground	Always	10 kΩ or higher
B9-3 (IGT4) or B77-54 (IGT4) - Body ground	Always	10 kΩ or higher
B12-2 (IGF), B11-2 (IGF), B10-2 (IGF), B9-2 (IGF) or B77-51 (IGF1) - Body ground	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 ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear 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 and ECT / Trouble Codes.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

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

CHECK HARNESS AND CONNECTOR (IG2 RELAY - IGNITION COIL ASSEMBLY)

Disconnect the ignition coil assembly connectors.
Remove the IG2 relay from the engine room relay block and junction block assembly.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B12-1 (+B) - IG2 relay terminal 5	Always	Below 1 Ω
B11-1 (+B) - IG2 relay terminal 5	Always	Below 1 Ω
B10-1 (+B) - IG2 relay terminal 5	Always	Below 1 Ω
B9-1 (+B) - IG2 relay terminal 5	Always	Below 1 Ω
B12-1 (+B), B11-1 (+B), B10-1 (+B), B9-1 (+B) or IG2 relay terminal 5 - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

OK

GO TO ECM POWER SOURCE CIRCUIT Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P0351, P0352, P0353, P0354