Yamaha 2003 FJR1300, Service Manual

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CHAS
• [C-5-6] Malfunction code 31 (Disconnection is detected between the fail-safe relay and the
hydraulic unit solenoid.)
Check the following:
1) ABS motor fuse
• Check if the ABS motor fuse beside the battery is blown.
2) Hydraulic unit solenoid coupler
• Check if the hydraulic unit solenoid coupler located in the right side cover is connected properly.
(Refer to “ABS COUPLERS”.)
3) Sub-wire harness (ABS)
• Check the pink/white leads between the ECU (ABS) and the fail-safe relay for continuity. (Refer
to “CIRCUIT DIAGRAM”.)
• ECU (ABS) coupler terminal (pink/white) is disconnected.
→
[D-1]
• Check the red leads between
1
and
2
, and between
1
and
3
of the hydraulic unit solenoid cir-
cuits for continuity.
4) Fail-safe relay
• Check if the fail-safe relay operates correctly.
→
[D-2]
5) Wire harness
• Check for continuity between the red/blue terminal of the fail-safe relay coupler and the positive
battery terminal.
• Remove the ABS fuse and check for continuity between the brown/white lead of the fail-safe
relay coupler and the ABS fuse. (See the illustration below.)
• [C-5-7] Malfunction code 32 (Fail-safe relay malfunction is detected.)
Check the following:
1) Fail-safe relay
• Check if the fail-safe relay operates correctly.
→
[D-2]
2) Sub-wire harness (ABS)
• Disconnect the sub-wire harness (ABS) from the fail-safe relay and the ECU (ABS), and then
check the insulation of the fail-safe relay coupler between the red/blue and red terminals.
Check for continuity between these two points
1
.
Fail-safe
relay
Front
solenoid
Rear
solenoid
red red
red
ANTI-LOCK BRAKE SYSTEM (FJR1300A)