P0356
2GR-FE ENGINE CONTROL: 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 assembly circuit.
- If DTC P0352 is set, check the No. 2 ignition coil assembly circuit.
- If DTC P0353 is set, check the No. 3 ignition coil assembly circuit.
- If DTC P0354 is set, check the No. 4 ignition coil assembly circuit.
- If DTC P0355 is set, check the No. 5 ignition coil assembly circuit.
- If DTC P0356 is set, check the No. 6 ignition coil assembly circuit.
A direct ignition system is used on this vehicle.
The direct ignition system is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil assembly and a 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. Spark of the spark plugs passes 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 and E1 of the ECM connectors.
HINT
The wavelength becomes shorter as the engine speed increases.
MONITOR DESCRIPTION
If the ECM does not receive any IGF signals despite the IGT signal being transmitted, 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 procedure) DTC Check / Clear.
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 [A].
6. Start the engine.
7. Idle the engine for 10 seconds [B].
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read the DTC [C].
10. If a DTC is output, the system is malfunctioning.
HINT
If a DTC is not output, perform the following procedure.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Input the DTC: P0351, P0352, P0353, P0354, P0355 or P0356.
13. Check the DTC judgment result.
HINT
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B] again.
14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
15. Check the judgment result [C].
HINT
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows NORMAL, the system is normal.
16. If the test result is INCOMPLETE or UNKNOWN and 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
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.
PROCEDURE
1. READ OUTPUT DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result:
B -- INSPECT IGNITION COIL ASSEMBLY (GROUND CIRCUIT)
A -- Continue to next step.
2. PERFORM SIMULATION TEST
(a) Clear the DTC DTC Check / Clear.
(b) Change the arrangement of the ignition coil assemblies.
NOTICE:
Do not change the location of the connectors.
(c) Perform a simulation test.
Result:
B -- REPLACE IGNITION COIL ASSEMBLY Removal
A -- Continue to next step.
3. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
(a) Disconnect the ignition coil assembly connectors.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
Text in Illustration:
(d) Reconnect the ignition coil assembly connectors.
NG -- INSPECT IGNITION COIL ASSEMBLY (GROUND CIRCUIT)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
(a) Disconnect the ignition coil assembly connectors.
(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 ignition coil assembly connectors.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
OK -- REPLACE ECM Removal
5. INSPECT IGNITION COIL ASSEMBLY (GROUND CIRCUIT)
(a) Disconnect the ignition coil assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
Text in Illustration:
(c) Reconnect the ignition coil assembly connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IG2 RELAY)