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P0351





1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0351-P0356: Ignition Coil "A" Primary / Secondary Circuit


CAUTION / NOTICE / HINT

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

DESCRIPTION

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 electrodes 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.













- Inspection using an oscilloscope

While cranking or idling, check the waveform between terminals IGT(1 to 6) and E1, and IGF1 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





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the Techstream on.

6. Start the engine.

7. Idle the engine for 10 seconds or more [A].

8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].

9. Read the DTCs.

HINT
* If a DTC is output, the system is malfunctioning.
* If a DTC is not output, perform the following procedure.

10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

11. Input the DTC: P0351, P0352, P0353, P0354, P0355 or P0356.

12. Check the DTC judgment result.





HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [A] and [B] again.

13. If no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT
Read freeze frame data using the Techstream. 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.

PROCEDURE

1. CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER

(a) Check the spark plug and sparks of the misfiring cylinder Testing and Inspection.

NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGF1 SIGNAL TERMINAL))





(a) Disconnect the ignition coil with igniter connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





(d) Reconnect the ECM connector.

(e) Reconnect the ignition coil with igniter connector.

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

3. INSPECT ECM (IGF1 VOLTAGE)





(a) Disconnect the ignition coil connector.

(b) Turn the ignition switch to ON.

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

Standard Voltage:





(d) Reconnect the ignition coil connector.

NG -- REPLACE ECM Removal

OK -- REPLACE IGNITION COIL ASSEMBLY Removal

4. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))





(a) Disconnect the ignition coil with igniter connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





(d) Reconnect the ECM connector.

(e) Reconnect the ignition coil with igniter connector.

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

5. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, OR IGT6 VOLTAGE)





(a) Measure the voltage according to the value(s) in the table below, when the engine is cranked.

Standard Voltage:





NG -- REPLACE ECM Removal
OK -- Continue to next step.

6. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, OR IGT6 VOLTAGE)





(a) Disconnect the ignition coil connector.

(b) Measure the voltage according to the value(s) in the table below, when the engine is cranked.

Standard Voltage:





(c) Reconnect the ignition coil connector.

NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)
OK -- Continue to next step.

7. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)





(a) Disconnect the ignition coil with igniter connector.

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

Standard Resistance (Check for Open):





(c) Turn the ignition switch to ON.

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

Standard Voltage:





(e) Reconnect the ignition coil with igniter connector.

NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)

OK -- REPLACE IGNITION COIL ASSEMBLY Removal

8. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)

(a) Disconnect the ignition coil with igniter connector.





(b) Disconnect the ignition switch connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





(d) Reconnect the ignition coil with igniter connector.

(e) Reconnect the ignition switch connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE IGNITION COIL ASSEMBLY Removal
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