P0354

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0351-P0356: Ignition Coil "A" 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 circuit.
- IF DTC P0352 is set, check the No. 2 ignition coil circuit.
- IF DTC P0353 is set, check the No. 3 ignition coil circuit.
- IF DTC P0354 is set, check the No. 4 ignition coil circuit.
- IF DTC P0355 is set, check the No. 5 ignition coil circuit.
- IF DTC P0356 is set, check the No. 6 ignition coil 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 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 signals (IGT) 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 signal (IGF) 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 6) and E1, and IGF1, 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. 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 Freeze Frame Data.

PROCEDURE

1. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

(a) Disconnect the E55, E56, E57, E63, E65 or E67 ignition coil connector.





(b) Turn the power switch on (IG).

(c) Measure the voltage between the terminal of the ignition coil connector and body ground.

Standard voltage:





(d) Measure the resistance between the terminal of the wire harness side connector and body ground.

Standard resistance:





(e) Reconnect the ignition coil connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

(a) Disconnect the E55, E56, E57, E63, E65 or E67 ignition coil connector.

(b) Disconnect the E83 ECM connector.

(c) Measure the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Reconnect the ECM connector.

(e) Reconnect the ignition coil connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353, P0354, P0355 OR P0356)

(a) Clear the DTC DTC Check / Clear.

(b) Put the engine in inspection mode Inspection Mode Procedure.

(c) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Shuffle arrangement of the ignition coils with igniters (among No. 1 to No. 6 cylinders).

NOTICE:
Do not shuffle the connectors.

(f) Perform a simulation test.

(g) Check DTCs displayed on the Techstream.

Result:





B -- REPLACE IGNITION COIL ASSEMBLY

A -- REPLACE ECM Removal