P0351
FA20 ENGINE CONTROL: SFI SYSTEM: P0351-P0354; Ignition Coil "A" Primary / Secondary Circuit; 2013 MY FR-S [03/2012 -]
P0351 - Ignition Coil "A" Primary / Secondary Circuit
P0352 - Ignition Coil "B" Primary / Secondary Circuit
P0353 - Ignition Coil "C" Primary / Secondary Circuit
P0354 - Ignition Coil "D" Primary / Secondary 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 spark of the spark plugs passes 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.
MONITOR DESCRIPTION
If the ECM receives the malfunction signal from the ignition coil driver IC, it interprets this as a fault in the igniter and stores a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Reading and Clearing Diagnostic Trouble Codes.
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 and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
7. With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of between 2500 and 3000 rpm for 40 seconds or more [A].
8. Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more [B].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
9. Enter the following menus: Powertrain / Engine / Trouble Codes.
10. Read pending DTCs.
HINT
* If a pending DTC is output, the system is malfunctioning.
* If a pending 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 or P0354.
13. 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.
14. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
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
* These DTCs indicate malfunctions relating to the primary circuit.
* If DTC P0351 is output, check the No. 1 ignition coil (No. 1 cylinder) circuit.
* If DTC P0352 is output, check the No. 2 ignition coil (No. 2 cylinder) circuit.
* If DTC P0353 is output, check the No. 3 ignition coil (No. 3 cylinder) circuit.
* If DTC P0354 is output, check the No. 4 ignition coil (No. 4 cylinder) circuit.
* 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 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 WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Shuffle the arrangement of the ignition coils (among No. 1 to No. 4 cylinders).
NOTICE:
Do not change the location of the connectors.
(g) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(h) Enter the following menus: Powertrain / Engine / Trouble Codes.
(i) Read DTCs.
Result
B -- REPLACE IGNITION COIL Removal
A -- Continue to next step.
2. INSPECT TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL)
(a) Disconnect the ignition coil connectors.
(b) Turn the ignition switch to ON.
(c) 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.
3. CHECK HARNESS AND CONNECTOR (IGNITION COIL - BODY GROUND)
(a) Disconnect the ignition coil connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM)
(a) Disconnect the ECM connector.
(b) Disconnect the ignition coil connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM Removal