Yamaha MT-09 2021 Service Manual page 598

Between ignition fuse 1 holder "1" and purge cut
valve solenoid coupler "2"
Between purge cut valve solenoid coupler "2"
and ECU coupler "3"
Between main switch coupler "4" and ignition
fuse 1 holder "1"
4
R
Br/L
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", 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 7, and complete the service.
NO
→ Go to "Short circuit check".
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to "REPLACING THE ECU (Engine Control Unit)" on page 8-56.
Ground short circuit check "A"
Between purge cut valve solenoid coupler "2"
and ground
Between main switch coupler "4" and ground
Lines short circuit check "B"
Purge cut valve solenoid coupler "2"
ECU coupler "3"
Main switch coupler "4"
1
red–red/white
yellow/red–yellow/red
brown/blue–brown/blue
2
R/W Y/R
red/white–ground
yellow/red–ground
brown/blue–ground
red/white–any other coupler terminal
yellow/red–any other coupler terminal
yellow/red–any other coupler terminal
brown/blue–any other coupler terminal
9-168
P0458
3
Y/R P/B O/G Gy/R O
Lg/R L/B G/B R/B B
R/L G/Y B
R/G Y/R Y/B L/W R/L B/W B/W