Fail-Safe Function Description - Suzuki GSF650A Service Manual

ABS Operation and ABS Indicator Light
The ABS indicator light shows the ABS operating condition. During normal operation, the ABS indicator light lights up
when the ignition switch is turned to ON and goes off after the motorcycle is ridden at more than 10 km/h (6.2 mile/h).
If a malfunction has occurred, the ABS indicator light keeps lighting up.
The ABS indicator light goes off when the motorcycle is
ridden at more than 10 km/h.
The ABS indicator light keeps lighting up even though the
motorcycle is ridden at more than 10 km/h (6.2 mile/h).
The ABS indicator light does not light up when turning the
ignition switch ON.
Stored DTCs (Diagnostic Trouble Codes)
As for the diagnostic trouble code, the code of the first malfunction occurred during one ignition ON period will be
stored. Pay attention to the fact that even though there may occur several malfunctions in one ON-period, only one
code will be stored. Codes of malfunction that occurred in the past are all stored, but the same diagnostic trouble code
will not be redundant.
Check and see if any diagnostic trouble code remains, by actually running the machine to activate ABS and by
carrying out the self-diagnosis after deleting the diagnostic trouble code once the malfunctioned part is repaired.

Fail-safe Function Description

If malfunction occurs in the ABS electric system, this sets fail-safe relay OFF. Consequently, motor relay will be set
OFF and the indicator light ON, and no current will be applied to motor solenoid valve inactivating ABS and turning
ABS indicator light ON. In this case, it functions as the normal brake. However, if malfunctions occurs while ABS is
being activated, when ABS control unit diagnoses that the operation can continue, it will effectuate ABS provisional
control (turning the ABS indicator light ON). Upon the moment when ABS provisional control is over, the fail-safe relay
will be set OFF.
ABS control unit
Motor relay
Fail-safe relay
CPU
The ABS is normally activated.
One or more malfunction has been found and ABS
activation been hanged up.
Check the wire harness and combination meter. Refer to
"ABS Indicator Light Inspection (Page 4E-17)".
FI
I718H1450122-04
M
Motor
Ignition switch
Solenoid valves Solenoid valves Solenoid valves
Combination meter
Indicator relay
Indicator relay Indicator relay
ABS:
B817H24501005
ABS
indicator
light
I717H2450035-01
4E-6