Suzuki GSX-R 1000 Service Manual: Throttle valve synchronization
Check and adjust the throttle valve synchronization among four cylinders.
- Start the engine and run it in idling condition for warming up.
- Stop the warmed-up engine.
- Lift and support the fuel tank. Refer to “fuel tank removal and installation” in section 1g (page 1g- 9).
- Remove the clamps (1).
- Disconnect the respective vacuum hoses (2) from vacuum nipples on the throttle body.
- Disconnect the iap sensor coupler (3).
- Connect the respective vacuum tester hoses (4) to the vacuum nipples.
- Set up the sds tool. (Refer to the sds operation manual for further details.)
- Start the engine.
- Click “data monitor”.
- Warm up the engine (engine coolant temp. More than 80 °c (176 °f)).
- Click “active control”.
- Click “isc air volume control” (5).
- Click “on” button (6) to fix the isc air volume of four cylinders.
| Note when making this synchronization, be sure that the engine coolant temperature is within 80 – 100 °c (176 – 212 °f). |
|
- Check for the synchronization of vacuum from #1 to #4 cylinders.
- Equalize the vacuum of the cylinders by turning each air screw (7) and keep it running at idling speed.
| Note always set the engine rpm at idle rpm. |
- If the adjustment is not yet correct, remove each air screw and clean them with a spray-type carburetor cleaner and blow dry with a compressed air. Also, clean the air screw passageways.
Note
|
- Repeat the procedures from 9) to 16).
- Close the sds tool and turn the ignition switch off.
- Disconnect the vacuum tester and reinstall the removed parts.
- After completing the throttle valve synchronization, clear the dtc and reset the isc learned value using sds tool. Refer to “isc valve preset and opening initialization” in section 1c .
Isc valve visual inspection
Visually inspect the isc valve if necessary.
Inspect the isc valve for any carbon deposition
defects. Clean or replace the isc valve if necessary.
...
Isc valve reset
When removing or replacing the throttle body assembly,
reset the isc valve learned value in the following
procedures:
turn the ignition switch on position.
Set up the sds tools. (Refer t ...
Other materials:
DTC “c28” (p1655): secondary throttle
valve actuator (stva) malfunction
Detected condition and possible cause
Detected condition
Possible cause
The operation voltage does not reach the stva.
Ecm does not receive communication signal from the
stva. Stva can not operate properly or its motor locked
Stva malfunction.
...
If you don't have a helmet, buy a helmet and wear it every
time you ride
Most accidents occur within a few
miles of home, and almost half
occur at speeds of less than 30
mph. So even if you're just going
on a quick errand, be preparedstrap
on your helmet before you
take off.
Helmets do not reduce essential
vision or hearing. Generally, helmets
do not cause or ...
Rear brake pedal adjustment
The rear brake pedal position
must be properly adjusted at all
times or the disk brake pads will
bear against the disk causing
damage to the pads and to the
disk surface. Adjust the brake
pedal posit~ on in the following
manner:
Loosen lock nut 1, and turn
the push rod 2 to locate t ...