P0351
DTC P0351 Ignition Coil "A" Primary / Secondary CircuitDTC P0352 Ignition Coil "B" Primary / Secondary Circuit
DTC P0353 Ignition Coil "C" Primary / Secondary Circuit
DTC P0354 Ignition Coil "D" Primary / Secondary Circuit
DESCRIPTION
HINT:
- These DTCs indicate malfunctions related to the primary circuit.
- If DTC P0351 is displayed, check the No.1 (#1) ignition coil circuit.
- If DTC P0352 is displayed, check the No.2 (#2) ignition coil circuit.
- If DTC P0353 is displayed, check the No.3 (#3) ignition coil circuit.
- If DTC P0354 is displayed, check the No.4 (#4) ignition coil circuit.
DTC Detection Condition:
A Direct Ignition System (DIS) is used on this vehicle.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition (IGT) signals for each cylinder. Using the IGT signal, the ECM turns ON and OFF the power transistor inside the igniter and this switches ON and OFF the current to the primary coil. When the current flow to the primary coil is cut off, high-voltage is generated in the secondary coil and this voltage is applied to the spark plugs to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back the ignition confirmation (IGF) signal to the ECM.
Reference: Inspection using an oscilloscope.
HINT: The correct waveform is as shown.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
Component Operating Range:
If the ECM does not receive the ignition confirmation (IGF) signal after sending the ignition (IGT) signal, the ECM interprets this as a fault in the igniter and sets a DTC.
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
Step 3-4:
Step 4(Continued)-6:
Step 7-8:
Step 8(Continued):
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.