SFI SYSTEM, Diagnostic DTC:P0351,P0352 and P0353

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

DESCRIPTION

A direct ignition system is used on this vehicle.

The direct ignition system is a 1-cylinder ignition system in which each cylinder is ignited by one No. 1 ignition coil 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 sparks of the spark plugs pass 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 on and off the current to the primary coil. 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.


DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0351	Ignition Coil "A" Primary / Secondary Circuit	Open or short in No. 1 ignition coil signal circuit (3 trip detection logic).	Ignition system Open or short in No. 1 ignition coil circuit No. 1 ignition coil (No. 1 cylinder) ECM	Comes on	DTC stored (except Euro-OBD) - (Euro-OBD)
P0352	Ignition Coil "B" Primary / Secondary Circuit	Open or short in No. 1 ignition coil signal circuit (3 trip detection logic).	Ignition system Open or short in No. 1 ignition coil circuit No. 1 ignition coil (No. 2 cylinder) ECM	Comes on	DTC stored (except Euro-OBD) - (Euro-OBD)
P0353	Ignition Coil "C" Primary / Secondary Circuit	Open or short in No. 1 ignition coil signal circuit (3 trip detection logic).	Ignition system Open or short in No. 1 ignition coil circuit No. 1 ignition coil (No. 3 cylinder) ECM	Comes on	DTC stored (except Euro-OBD) - (Euro-OBD)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note:

After replacing the ECM, perform idle learning.
Click here
Inspect the fuses for circuits related to this system before performing the following procedure.

Tip:

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

PERFORM SIMULATION TEST (SHUFFLE ARRANGEMENT OF NO. 1 IGNITION COILS)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Shuffle arrangement of the No. 1 ignition coils (among No. 1 to No. 3 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

B

REPLACE NO. 1 IGNITION COIL

Click here

A

CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 IGNITION COIL)

*a	Front view of wire harness connector (to No. 1 Ignition Coil)

Disconnect the No. 1 ignition coil connectors.

Turn the ignition switch to ON.

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

Standard Voltage


Tester Connection	Condition	Specified Condition
B58-1 (+B) - B58-3 (GND)	Ignition switch ON	11 to 14 V
B59-1 (+B) - B59-3 (GND)	Ignition switch ON	11 to 14 V
B60-1 (+B) - B60-3 (GND)	Ignition switch ON	11 to 14 V

Result


Proceed to
OK
NG

NG

CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - BODY GROUND)Click here

OK

CHECK HARNESS AND CONNECTOR (ECM - NO. 1 IGNITION COIL)

Disconnect the ECM connector.
Disconnect the No. 1 ignition coil connectors.
Measure the resistance according the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
B31-27 (IGT1) - B58-2 (IGT)	Always	Below 1 Ω
B31-57 (IGT2) - B59-2 (IGT2)	Always	Below 1 Ω
B31-56 (IGT3) - B60-2 (IGT3)	Always	Below 1 Ω
B31-27 (IGT1) or B58-2 (IGT) - Body ground	Always	10 kΩ or higher
B31-57 (IGT2) or B59-2 (IGT2) - Body ground	Always	10 kΩ or higher
B31-56 (IGT3) or B60-2 (IGT3) - Body ground	Always	10 kΩ or higher

Result


Proceed to
OK
NG

OK

REPLACE ECM

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - BODY GROUND)

Disconnect the No. 1 ignition coil connectors.
Measure the resistance according to the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
B58-3 (GND) - Body ground	Always	Below 1 Ω
B59-3 (GND) - Body ground	Always	Below 1 Ω
B60-3 (GND) - Body ground	Always	Below 1 Ω

Result


Proceed to
OK
NG

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR