Yamaha MBK XMAX 2014, Service Manual

Page: 384 / 482

FUEL INJECTION SYSTEM
8-71
4 Defective meter assembly. Replace the meter assembly. Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 5.
5 Malfunction in ECU. Replace the ECU.
Fault code No. Er-3
Item
ECU (engine control unit) internal malfunction (output signal
error): data from the ECU cannot be received correctly.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. —
FI diagnostic tool display —
Procedure —
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Connection of meter assem-
bly coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 2.
2 Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 3.
3 Wire harness continuity. Open or short circuit
→
Re-
place the wire harness.
Between meter coupler and
ECU coupler.
yellow/blue–yellow/blue
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 4.
4 Defective meter assembly. Replace the meter assembly. Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 5.
5 Malfunction in ECU. Replace the ECU.
Fault code No. Er-2
Item
ECU (engine control unit) internal malfunction (output signal
error): no signals are received from the ECU within the speci-
fied duration.