Yamaha TMAX 2020 Service Manual page 582

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EAS20580
P0351
EAS33060
TROUBLESHOOTING
Item
Ignition coil: open or short circuit detected in the primary lead of the ignition coil.
Fail-safe system
• Unable to start engine
• Unable to drive vehicle
Procedure
1. Connection of ignition coil coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
 Go to step 2.
NO
a. Connect the coupler securely or replace the wire harness.
b. Start the engine and let it idle for approximately 5 seconds.
c. Check the condition of the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
 Go to step 7, and complete the service.
NO
 Go to step 2.
2. Connection of ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
 Go to step 3.
NO
a. Connect the coupler securely or replace the wire harness.
b. Start the engine and let it idle for approximately 5 seconds.
c. Check the condition of the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
 Go to step 7, and complete the service.
NO
 Go to step 3.
3. Wire harness continuity.
• Disconnect the ignition coil coupler and ECU coupler.
• Open circuit check
Between ignition coil coupler "1" and ECU cou-
pler "2"
orange–orange
9-108
P0351

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