Hisun HS700UTV-4, Maintenance Handbook

Page: 360 / 388

ENGINE MANAGEMENT SYSTEM
- 347 -
2 ． Handling – DOs and DONTs
3
．
Throttle Body Removal
•
Disconnect negative terminal of the battery
•
Disconnect electric lead wire of throttle position sensor coupler, stepper motor coupler and
MAP/MAT sensor coupler ( if this sensor is mounted on the throttle body)
•
Disconnect accelerator cable from throttle body
•
Remove air cleaner outlet hose and throttle body outlet hose
THROTTLE BODY ASSEMBLY HANDLING
ACTION REASON
DO:
Use care during assembly of harness to throttle
body.
Avoid terminal damage.
DO:
Avoid any liquid contamination in the throttle
body area.
Ensure proper operation.
DO:
Unload and install units one at a time from
packing trays.
Damage may be done to critical components.
DO:
Return any dropped, damaged, or suspect
material with a tag that describes the problem.
(Only warranty cases)
Ensure fast and correct diagnosis of root
DO: Remove and discard protective caps just before
assembling mating components. Protects system from contamination, which
can prevent proper operation.
DO: clean the by pass passage after removing
bottom cover
To ensure good idle stability
DO NOT:
Use any dropped or impacted unit.
Internal damage may have occurred or
emissions settings may have been upset.
DO NOT: Store units without protective caps in place. Contamination may impair correct operation.
DO NOT:
Ship or store near saltwater without
protection.
Corrosion buildup may impact proper
operation.
DO NOT:
Exposed to environmental conditions
(Moisture) prior to complete vehicle
installation.
Corrosion buildup may impact proper
operation.
DO NOT:
Apply any voltage other than system
voltage for testing.
Damage could occur.
DO NOT:
Apply excessive band clamp loading Damage could occur.
DO NOT:
Remove packing in a way that allows
contact between parts.
Minimum air leakage could be affected
and/or other damage could occur.
DO NOT:
Release the throttle cam abruptly from any
position without the throttle linkage
attached. Damage could occur.
DO NOT:
Let the by pass holes be blocked by dirt or
foreign particles.
This could effect idle stability
DO NOT:
Rake, stage, or handle parts in a manner
that allows contact between parts.
Damage will occur.