Yamaha XVZ13TF 1999 Service Manual page 472

CRUISE CONTROL SYSTEM
2. Trouble diagnosis of the brake light sig-
nal
1) The "RES" indicator light is lit.
2) Operate the following front brake and rear
switches.
If the RES indicator light is not extinguished
after either of these switches is operated, it
means that the relevant switch is in failure.
Example:
If the front brake switch is operated and the
"RES" indicator light is not extinguished, it
means that the front brake switch is infailure.
3. Trouble diagnosis of the throttle drive
1) Push the cruise control switch to "RES".
The throttle will be then opened fully in
approx. 2.5 seconds and kept fully open for 3
seconds.
The throttle will be fully closed approx. 2.5
seconds later.
Check the closing throttle for noises and op-
eration.
If noise is heard from the vacuum pump but
the throttle is not operating, it means that the
throttle cable is in failure.
If no noises are heard from the vacuum
pump, it means that the vacuum pump is in
failure.
Vacuum pump
12
Vacuum actuator
13
Throttle cable joint
14
Throttle valve
17
8-74
ELEC