P0352
DTC P0352 Ignition Coil "B" Primary/CircuitHINT:
- These DTCs indicate malfunctions related to the primary circuit.
- If DTC P0351 is displayed, check the No.1 ignition coil with igniter circuit.
- If DTC P0352 is displayed, check the No.2 ignition coil with igniter circuit.
- If DTC P0353 is displayed, check the No.3 ignition coil with igniter circuit.
- If DTC P0354 is displayed, check the No.4 ignition coil with igniter circuit.
CIRCUIT DESCRIPTION
DTC Detection Condition:
A Direct Ignition System (DIS) is used in this vehicle.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder ignition system, one spark plug is connected to the end of the secondary winding. A powerful voltage is generated in the secondary winding and 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 transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns ON and OFF the power transistor inside the igniter, which switches ON and OFF a current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks 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 the oscilloscope.
While cranking or idling, check the waveform between terminals IGT (1 to 4) and E1, and IGF1 and E1 of the ECM connectors.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
Component Operating Range:
If the ECM does not receive the ignition confirmation signal (IGF) after sending the ignition signal (IGT), the ECM interprets this as a fault in the igniter and sets a DTC.
Wiring Diagram:
INSPECTION PROCEDURE
Step 1 - 2:
Step 3:
Step 4:
Step 5 - 6:
Step 7:
Step 8:
HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. 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.