P0356
3MZ-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
DESCRIPTION
HINT:
- These DTCs indicate malfunctions relating to the primary circuit.
- If DTC P0351 is set, check the No. 1 ignition coil circuit.
- If DTC P0352 is set, check the No. 2 ignition coil circuit.
- If DTC P0353 is set, check the No. 3 ignition coil circuit.
- If DTC P0354 is set, check the No. 4 ignition coil circuit.
- If DTC P0355 is set, check the No. 5 ignition coil circuit.
- If DTC P0356 is set, check the No. 6 ignition coil circuit.
A Direct Ignition System (DIS) is used on this vehicle.
The DIS is an ignition system in which each cylinder is ignited by one ignition coil and the spark plug which is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring of the coil, is applied directly to each spark plug. The spark of the spark plugs pass from the center electrode to the ground electrode.
The ECM (included in the hybrid vehicle control ECU) 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 IGF and E1 of the hybrid vehicle control ECU connector.
MONITOR DESCRIPTION
If the ECM (Included in the hybrid vehicle control ECU) does not receive any IGF signals despite transmitting the IGT signal, 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
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. The ECM (included in the hybrid vehicle control ECU) 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. PERFORM SIMULATION TEST
(a) Clear the DTC(s) DTC Check / Clear.
(b) Change the arrangement of the ignition coils (with igniters).
NOTE: Do not change the location of the connectors.
(c) Perform a simulation test.
Result:
B -- REPLACE IGNITION COIL ASSEMBLY
A -- Continue to next step.
2. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
(a) Disconnect the ignition coil assembly connectors.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(d) Reconnect the ignition coil assembly connectors.
NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
(a) Disconnect the ignition coil assembly connectors.
(b) Disconnect the hybrid vehicle control ECU 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 hybrid vehicle control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
(a) Disconnect the ignition coil assembly connectors.
(b) Disconnect the hybrid vehicle control ECU 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 hybrid vehicle control ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - HYBRID VEHICLE CONTROL ECU)
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
5. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
(a) Disconnect the ignition coil assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
(c) Reconnect the ignition coil assembly connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)
OK -- Continue to next step.
6. INSPECT FUSE (INJ NO. 1 FUSE)
(a) Remove the INJ No. 1 fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Reinstall the INJ No. 1 fuse.
NG -- REPLACE FUSE (INJ NO. 1 FUSE)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR
(a) Disconnect the ignition coil assembly connectors.
(b) Remove the IG2 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) Reinstall the IG2 relay.
(e) Reconnect the ignition coil assembly connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - IGNITION COIL ASSEMBLY)
OK -- CHECK ECM POWER SOURCE CIRCUIT