P0356

2UZ-FE 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

DTC P0355 - Ignition Coil "E" Primary / Secondary Circuit

DTC P0356 - Ignition Coil "F" Primary / Secondary Circuit

DTC P0357 - Ignition Coil "G" Primary / Secondary Circuit

DTC P0358 - Ignition Coil "H" Primary / Secondary Circuit

DESCRIPTION
HINT:
- These DTCs indicate a malfunction related to a primary circuit.
- If DTC P0351 is displayed, check No. 1 ignition coil circuit.
- If DTC P0352 is displayed, check No. 2 ignition coil circuit.
- If DTC P0353 is displayed, check No. 3 ignition coil circuit.
- If DTC P0354 is displayed, check No. 4 ignition coil circuit.
- If DTC P0355 is displayed, check No. 5 ignition coil circuit.
- If DTC P0356 is displayed, check No. 6 ignition coil circuit.
- If DTC P0357 is displayed, check No. 7 ignition coil circuit.
- If DTC P0358 is displayed, check No. 8 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 signals (IGTs) for each cylinder. Using the IGTs, the ECM turns the power transistor inside the igniter on/off, which switches on/off current to the primary coil. When 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 current to the primary coil, the igniter sends back ignition confirmation signals (IGFs) for each cylinder ignition to the ECM.

- Reference: Inspect using an oscilloscope.
- While cranking or idling the engine, check the waveform between terminals IGT1 to IGT8 and E1, and IGF1 to IGF2 and E1 of the E6, E8 and E6 ECM connectors.

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.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

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.
- If DTCs P0351, P0354, P0356 and P0357 are output simultaneously, IGF1 circuit may be open or short.
- If DTCs P0352, P0353, P0355 and P0358 are output simultaneously, IGF2 circuit may be open or short.

PROCEDURE

1. CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER
(a) Check the spark plug and spark of the misfiring cylinder P0300.
NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL - 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, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
(b) Disconnect the E5 ECM connector.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):

Standard resistance (Check for short):

(d) Reconnect the ignition coil with igniter connectors.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT ECM (IGF1 AND IGF2 VOLTAGE)

(a) Disconnect the ignition coil with igniter connectors.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the E5 and E7 ECM connectors.
Standard voltage:

(d) Reconnect the ignition coil with igniter connectors.
NG -- REPLACE ECM
OK -- REPLACE IGNITION COIL WITH IGNITER
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM [IGT SIGNAL TERMINAL])

Standard resistance (Check for short):

(d) Reconnect the ignition coil with igniter connectors.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE)

(a) Measure the voltage of the E5 and E7 ECM connectors when the engine is cranked.
Standard voltage:

NG -- REPLACE ECM
OK -- Continue to next step.
6. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
(b) Measure the voltage of the E5 and E7 ECM connectors when the engine is cranked.
Standard voltage:

(c) Reconnect the ignition coil with igniter connectors.
NG -- REPLACE ECM
OK -- Continue to next step.
7. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil with igniter connectors.
(b) Turn the ignition switch ON or START.
(c) Measure the voltage of the wire harness side connector and body ground.
Standard voltage:

(d) Reconnect the ignition coil connectors.
OK -- REPLACE IGNITION COIL ASSEMBLY
NG -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.
(b) Disconnect the I18 ignition switch connector.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):

Standard resistance (Check for short):

(d) Reconnect the ignition switch connector.
(e) Reconnect the ignition coil with igniter connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE IGNITION COIL ASSEMBLY