Visually inspect the isc valve if necessary.

Throttle body inspection and cleaning
Throttle valve synchronizationWiring diagram
Refer to “wire color symbols” in section 0a .
For e-02, 19, 24, 51
For e-03, 28
For e-14, 33
...
Pair system inspection
Inspect pair system
every 12 000 km (7 500 miles, 24 months)
Inspect the pair (air supply) system periodically. Refer to “pair system
inspection” in section 1b .
Throttle valve synchronization
Inspect throttle valve synchronization
initially at 1 000 km (600 miles, 2 months) (e-33 only)
and ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Throttle body components” “engine bottom side assembly”
Special tool
...