Visually inspect the isc valve if necessary.

Throttle body inspection and cleaning
Throttle valve synchronizationTire pressure and loading
Proper tire pressure and proper
tire loading are important factors.
Overloading your tires can lead to
tire failure and loss of vehicle control.
Check tire pressure each day
before you ride, and be sure the
pressure is correct for the vehicle
load according to the table below.
Tire pre ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Water hose routing diagram” “water pump components” “water
pump construction”
Special tool
...
DTC “c29” (p1654-h/l): secondary throttle
position sensor (stps) circuit malfunction
Detected condition and possible cause
Detected condition
Possible cause
C29
Output voltage is not within the following
range.
Difference between actual throttle opening
and opening calculated by ecm is larger
than specified value.
0.15 V ≤ Sensor ...