P0356

2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0351: Ignition Coil "A" Primary / Secondary Circuit

DTC P0351 - Ignition Coil "A" Primary / Secondary Circuit

DTC P0352 - Ignition Coil "B" Primary / Secondary Circuit

DTC P0353 - Ignition Coil "C" Primary / Secondary Circuit

DTC P0354 - Ignition Coil "D" Primary / Secondary Circuit

DTC P0355 - Ignition Coil "E" Primary / Secondary Circuit

DTC P0356 - Ignition Coil "F" Primary / Secondary Circuit

DTC P0357 - Ignition Coil "G" Primary / Secondary Circuit

DTC P0358 - Ignition Coil "H" Primary / Secondary Circuit

DESCRIPTION
HINT:
- These DTCs indicate malfunctions relating to the primary circuit.
- If DTC P0351 is set, check the No. 1 ignition coil with igniter circuit.
- If DTC P0352 is set, check the No. 2 ignition coil with igniter circuit.
- If DTC P0353 is set, check the No. 3 ignition coil with igniter circuit.
- If DTC P0354 is set, check the No. 4 ignition coil with igniter circuit.
- If DTC P0355 is set, check the No. 5 ignition coil with igniter circuit.
- If DTC P0356 is set, check the No. 6 ignition coil with igniter circuit.
- If DTC P0357 is set, check the No. 7 ignition coil with igniter circuit.
- If DTC P0358 is set, check the No. 8 ignition coil with igniter 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 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. 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.












- Reference: Inspection using an oscilloscope.
- While cranking or idling the engine, check the waveform between terminals IGT (1 to 8) and E1, and IGF1 or IGF2 and E1 of the ECM connector.






MONITOR DESCRIPTION





If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set 1 second after the engine is next started.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM









INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. Freeze frame data records 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.

PROCEDURE

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)




(a) Disconnect the D10, D12, D14, D16, D19, D21, D23 or D25 ignition coil with igniter connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)




(a) Disconnect the D10, D12, D14, D16, D19, D21, D23 or D25 ignition coil with igniter connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357 OR P0358)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream ON.
(c) Clear DTCs DTC Check / Clear.
(d) Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 8 cylinders).
NOTE: Do not shuffle the connectors.
(e) Perform a simulation test.
(f) Check DTCs displayed on the Techstream.

Result





B -- REPLACE IGNITION COIL ASSEMBLY
A -- REPLACE ECM