Dtc P0351/14 Ignition Coil A Primary / Secondary Circuit
DESCRIPTION
MONITOR DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM SIMULATION TEST
INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)
CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGF1 SIGNAL)
CHECK IF DTC OUTPUT RECURS
DTC P0351/14 Ignition Coil "A" Primary / Secondary Circuit |
DTC P0352/15 Ignition Coil "B" Primary / Secondary Circuit |
DTC P0353/14 Ignition Coil "C" Primary / Secondary Circuit |
DTC P0354/15 Ignition Coil "D" Primary / Secondary Circuit |
DESCRIPTION
- HINT:
- These DTCs indicate malfunctions related to the primary circuit.
- If DTC P0351/14 is displayed, check No. 1 ignition coil with igniter circuit.
- If DTC P0352/15 is displayed, check No. 2 ignition coil with igniter circuit.
- If DTC P0353/14 is displayed, check No. 3 ignition coil with igniter circuit.
- If DTC P0354/15 is displayed, check No. 4 ignition coil with igniter circuit.
A Direct Ignition System (DIS) is used on this vehicle. The DIS is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, one spark plug is connected to the end of the secondary winding. High-voltage is generated in the secondary winding and is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode.The ECM determines the ignition timing and transmits the ignition (IGT) signals for each cylinder. Using the IGT signal, the ECM turns ON and OFF the power transistor inside the igniter, which switches ON and OFF a current to the primary coil. When the current to the primary coil is cut off, high-voltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back the ignition confirmation (IGF) signal to the ECM.DTC No.
| DTC Detection Condition
| Trouble Area
|
P0351/14
P0352/15
P0353/14
P0354/15
| No IGF signal to ECM while engine is running
| - Ignition system
- Open or short in IGF or IGT (1to 4) circuit between ignition coil with igniter and ECM
- No. 1 to No. 4 ignition coil with igniter
- ECM
|
MONITOR DESCRIPTION
If the ECM does not receive an IGF after sending an IGT, it interprets this as a fault in the igniter and sets a DTC. The monitor runs for 1 second (the first second of engine idle) after the engine is started.
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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.
| 1.PERFORM SIMULATION TEST |
Clear the DTCs (Toyota Fortuner RM000000ZPW007X.html).
Change the arrangement of the ignition coils (with igniters).
- NOTICE:
- Do not change the location of the connectors.
Perform the simulation test.
- Result:
Display (DTC Output)
| Proceed to
|
Cleared DTCs are output again
| A
|
Other ignition coil DTCs
| B
|
| | REPLACE IGNITION COIL ASSEMBLY |
|
|
| 2.INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE) |
Disconnect the I1, I2, I3 and I4 ignition coil with igniter connectors.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
I1-4 (GND) - Body ground
| Below 1 Ω
|
I2-4 (GND) - Body ground
| Below 1 Ω
|
I3-4 (GND) - Body ground
| Below 1 Ω
|
I4-4 (GND) - Body ground
| Below 1 Ω
|
Turn the ignition switch ON.
Measure the voltage of the wire harness side connectors.
- Standard voltage:
Tester Connection
| Specified Condition
|
I1-1 (+B) - I1-4 (GND)
| 9 to 14 V
|
I2-1 (+B) - I2-4 (GND)
| 9 to 14 V
|
I3-1 (+B) - I3-4 (GND)
| 9 to 14 V
|
I4-1 (+B) - I4-4 (GND)
| 9 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM) |
Disconnect the I1, I2, I3 and I4 ignition coil with igniter connectors.
Disconnect the E11 ECM connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
I1-2 - E11-23 (IGF1)
| Below 1 Ω
|
I2-2 - E11-23 (IGF1)
| Below 1 Ω
|
I3-2 - E11-23 (IGF1)
| Below 1 Ω
|
I4-2 - E11-23 (IGF1)
| Below 1 Ω
|
I1-3 - E11-17 (IGT1)
| Below 1 Ω
|
I2-3 - E11-16 (IGT2)
| Below 1 Ω
|
I3-3 - E11-15 (IGT3)
| Below 1 Ω
|
I4-3 - E11-14 (IGT4)
| Below 1 Ω
|
I1-2 or E11-23 (IGF1) - Body ground
| 10 kΩ or higher
|
I2-2 or E11-23 (IGF1) - Body ground
| 10 kΩ or higher
|
I3-2 or E11-23 (IGF1) - Body ground
| 10 kΩ or higher
|
I4-2 or E11-23 (IGF1) - Body ground
| 10 kΩ or higher
|
I1-3 or E11-17 (IGT1) - Body ground
| 10 kΩ or higher
|
I2-3 or E11-16 (IGT2) - Body ground
| 10 kΩ or higher
|
I3-3 or E11-15 (IGT3) - Body ground
| 10 kΩ or higher
|
I4-3 or E11-14 (IGT4) - Body ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGF1 SIGNAL) |
While cranking or idling, check the waveform of the ECM connector using an oscilloscope.
- OK:
Tester Connection
| Specified Condition
|
E11-17 (IGT1) - E11-3 (E1)
| Correct waveform is as shown
|
E11-16 (IGT2) - E11-3 (E1)
| Correct waveform is as shown
|
E11-15 (IGT3) - E11-3 (E1)
| Correct waveform is as shown
|
E11-14 (IGT4) - E11-3 (E1)
| Correct waveform is as shown
|
E11-23 (IGF1) - E11-3 (E1)
| Correct waveform is as shown
|
Tool Setting
| Condition
|
2 V/DIV., 20 msec./DIV.
| Idling
|
- HINT:
- The wavelength becomes shorter as engine speed increases.
| 5.CHECK IF DTC OUTPUT RECURS |
Clear the DTC (Toyota Fortuner RM000000ZPW007X.html).
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON and turn the intelligent tester ON.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTC.
- Result:
Display (DTC Output)
| Proceed to
|
One or more of P0351, P0352, P0353, P0354, P0355 and P0356
| A
|
No output
| B
|
