P0351
2GR-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
CAUTION / NOTICE / HINT
HINT:
- These DTCs indicate malfunctions relating to the primary circuit.
- If DTC P0351 is set, check the No. 1 ignition coil with igniter circuit.
- If DTC P0352 is set, check the No. 2 ignition coil with igniter circuit.
- If DTC P0353 is set, check the No. 3 ignition coil with igniter circuit.
- If DTC P0354 is set, check the No. 4 ignition coil with igniter circuit.
- If DTC P0355 is set, check the No. 5 ignition coil with igniter circuit.
- If DTC P0356 is set, check the No. 6 ignition coil with igniter 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. High-voltage is generated in the secondary wiring and then applied directly to each spark plug. The sparks of the spark plugs pass from the center electrodes 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, high- 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 off, the igniter sends back an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.
Reference: Inspection using an oscilloscope
While cranking or idling, check the waveform between terminals IGT (1 to 6) and E1, and IGF1 and E1 of the ECM connector.
MONITOR DESCRIPTION
If the ECM 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 intelligent tester. 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.
PROCEDURE
1. CHECK FOR SPARKS AND CHECK SPARK PLUG OF MISFIRING CYLINDER
HINT: P0300
NG -- CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGF1 SIGNAL TERMINAL))
(a) Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil with igniter connector.
(b) Disconnect the E8 ECM connector.
(c) Measure the resistance.
Standard resistance:
Check for open
Check for short
(d) Reconnect the ECM connector.
(e) Reconnect the ignition coil with igniter connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT ECM (IGF1 VOLTAGE)
(a) Disconnect the ignition coil connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage between the terminals of the E8 and E7 ECM connectors.
Standard voltage:
(d) Reconnect the ignition coil connector.
NG -- REPLACE ECM
OK -- REPLACE IGNITION COIL ASSEMBLY
4. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))
(a) Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil with igniter connector.
(b) Disconnect the E8 ECM connector.
(c) Measure the resistance.
Standard resistance :
Check for open
Check for short
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5 OR IGT6 VOLTAGE)
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between the terminals of the E8 and E7 ECM connectors.
Standard voltage:
NG -- REPLACE ECM
OK -- Continue to next step.
6. INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5 OR IGT6 VOLTAGE)
(a) Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage between the terminals of the E8 and E7 ECM connectors.
Standard voltage:
(d) Reconnect the ignition coil connector.
NG -- REPLACE ECM
OK -- Continue to next step.
7. INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)
(a) Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil with igniter connector.
(b) Measure the resistance.
Standard resistance:
Check for open
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage between the terminals of the wire harness side connector.
Standard voltage:
(e) Reconnect the ignition coil with igniter connector.
NG -- INSPECT IGNITION RELAY NO. 2
OK -- REPLACE IGNITION COIL ASSEMBLY
8. INSPECT IGNITION RELAY NO. 2
(a) Remove the IG2 relay from the engine room R/B.
(b) Measure the IG2 relay resistance.
Standard resistance:
(c) Reinstall the IG2 relay.
NG -- REPLACE IGNITION RELAY NO. 2
OK -- Continue to next step.
9. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH)
(a) Disconnect the I2, I3, I4, I5, I6 or I7 ignition coil with igniter connector.
(b) Remove the IG2 relay from the engine room R/B.
(c) Measure the resistance.
Standard resistance:
Check for open
Check for short
(d) Reconnect the ignition coil with igniter connector.
(e) Reinstall the IG2 relay connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BATTERY)
(a) Inspect the INJ fuse.
(1) Remove the INJ fuse from the fusible link.
(2) Measure the INJ fuse resistance.
Standard resistance:
Below 1 Ohms
(3) Reinstall the INJ fuse.
(b) Check the harness and connector between the IG2 relay and positive battery terminal.
(1) Remove the IG2 relay from the engine room R/B.
(2) Disconnect the battery negative terminal.
(3) Disconnect the battery positive terminal.
(4) Measure the resistance between the terminals.
Standard resistance (check for open):
Standard resistance (check for short):
(5) Reconnect the battery positive terminal.
(6) Reconnect the battery negative terminal.
(7) Reinstall the IG2 relay.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - BODY GROUND)
(a) Inspect the IG2 fuse.
(1) Remove the IG2 fuse from the instrument panel J/B.
(2) Measure the IG2 fuse resistance.
Standard resistance:
Below 1 Ohms
(3) Reinstall the IG2 fuse.
(b) Check the harness and connector between the IG2 relay and ignition switch.
(1) Remove the IG2 relay from the engine room R/B.
(2) Disconnect the I14 ignition switch connector.
(3) Measure the resistance between the terminals.
Standard resistance (check for open):
Standard resistance (check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE IGNITION COIL ASSEMBLY