Yamaha YZF-R1 Series Service Manual page 792

EAS20669
89_ABS
EAS33299
TROUBLESHOOTING
Item
CAN communication (between meter assembly and hydraulic unit assembly)
Procedure
1. Defective coupler between the meter assembly and the hydraulic unit assembly
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
TIP
Turn the main switch to "OFF" before disconnecting or connecting a coupler.
Is check result OK?
YES
→ Go to step 2.
NO
→ If there is a malfunction, repair it and connect the coupler securely.
2. Wire harness continuity.
• Disconnect the meter assembly coupler "1", joint coupler "2" and ABS ECU coupler "3".
• Open circuit check
Between meter assembly coupler and joint coupler
Between joint coupler and ABS ECU coupler
1
B/W R/W Br/W Br/B Dg Ch W/L W/Y
R/GR/G Sb/W G/L G/Y G G/B W/B W/G
*. Joint coupler for YZF-R1
**. Joint coupler for YZF-R1M
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
→ Replace the wire harness.
Br/Y Lg L/W L/B G/W
W G/O Y
2
*
L/W L/W L/W L/W L/W L/W L/B L/B L/B L/B L/B L/B
**
L/W L/W L/W L/W L/W L/W L/W
L/B L/B L/B L/B L/B L/B L/B
9-295
blue/white–blue/white
blue/black–blue/black
blue/white–blue/white
blue/black–blue/black
3
L/W
R/W
89_ABS
Gy/B L Y G R/B B L/W
B/W
B
G/O W/L L B W W L/B