P0354
1NZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0351: Ignition Coil "A" Primary / Secondary Circuit
DTC P0351 - Ignition Coil "A" Primary / Secondary Circuit
DTC P0352 - Ignition Coil "B" Primary / Secondary Circuit
DTC P0353 - Ignition Coil "C" Primary / Secondary Circuit
DTC P0354 - Ignition Coil "D" Primary / Secondary Circuit
DESCRIPTION
HINT:
- These DTCs indicate malfunctions related to the primary circuit.
- If DTC P0351 is displayed, check the No.1 (#1) ignition coil circuit.
- If DTC P0352 is displayed, check the No.2 (#2) ignition coil circuit.
- If DTC P0353 is displayed, check the No.3 (#3) ignition coil circuit.
- If DTC P0354 is displayed, check the No.4 (#4) ignition coil 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, the one spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding 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 outputs the ignition (IGT) signals for each cylinder. Using the IGT signal, the ECM turns ON and OFF the power transistor inside the igniter and this switches ON and OFF the current to the primary coil. When the current flow 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 spark 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.
Reference: Inspection using an oscilloscope.
HINT: The correct waveform is as shown.
MONITOR DESCRIPTION
If the ECM does not receive the ignition confirmation (IGF) signal after sending the ignition (IGT) signal, the ECM interprets this as a fault in the igniter and sets a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
*: Counted when the IGF signal is not returned to the ECM even though the IGT signal has been sent.
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using 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. CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER
OK:
Spark occurs.
NG -- CHECK HARNESS AND CONNECTOR (IGNITION - ECM (IGT SIGNAL TERMINAL))
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM (IGF SIGNAL TERMINAL))
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Disconnect the E4 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 and igniter connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK ECM (IGF VOLTAGE)
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Turn the power switch ON (IG).
(c) Measure the voltage between the specified terminals of the E4 and E5 ECM connectors.
Standard voltage:
(d) Reconnect the ignition coil and igniter connector.
NG -- REPLACE ECM
OK -- REPLACE IGNITION COIL
4. CHECK HARNESS AND CONNECTOR (IGNITION - ECM (IGT SIGNAL TERMINAL))
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Disconnect the E4 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 and igniter connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK ECM (IGT1, IGT2, IGT3 OR IGT4 VOLTAGE)
(a) Measure the voltage between the applicable terminals of the E4 and E5 ECM connectors when the engine is cranked.
Standard voltage:
NG -- REPLACE ECM
OK -- Continue to next step.
6. CHECK ECM (IGT1, IGT2, IGT3 OR IGT4 VOLTAGE)
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Measure the voltage between the applicable terminals of the E4 and E5 ECM connectors when the engine is cranked.
Standard voltage:
(c) Reconnect the ignition coil and igniter connector.
NG -- REPLACE ECM
OK -- Continue to next step.
7. CHECK IGNITION COIL (POWER SOURCE)
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Turn the power switch ON (IG).
(c) Measure the voltage between the terminals of the wire harness side connector.
Standard voltage:
(d) Reconnect the ignition coil and igniter connector.
OK -- REPLACE IGNITION COIL
NG -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (IGNITION COIL - IG2 RELAY)
(a) Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
(b) Remove the integration relay from the engine room relay block.
(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 and igniter connector.
(e) Reinstall the integration relay.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE IGNITION COIL