Yamaha TMAX 2020 Service Manual page 640

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EAS20649
U0155 or Err
EAS33129
TROUBLESHOOTING
Item
Multi-function meter: signals cannot be transmitted between the ECU and the multi-function meter.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
TIP
"Err" is displayed on the clock display of the multi-function meter, but the MIL does not come on.
1. Connection of meter assembly 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. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the "Recovered" condition?
YES
 Go to step 6, 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. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the "Recovered" condition?
YES
 Go to step 6, and complete the service.
NO
 Go to step 3.
9-166
U0155 or Err

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