Bac Valve; Air Valve - Mazda 626 1989 Workshop Manual

P / S s w i t c h
A / C s w i t c h
C o o l i n g f a n s w i t c h
R e a r d e f r o s t e r s w i t c h
H e a d lig h t s w i t c h
B lo w e r m o t o r s w i t c h
(ISC valve)
. Connect the ISC valve connector.
6
Note
a) Make sure that the initial idle speed is set
to specification.
b) All accessory must be OFF.
7. Again disconnect the ISC valve connector (engine
at normal operating temperature).
. Check that the engine speed decreases.
8
9. Reconnect the ISC valve connector.
10 Remove the jumper wire from the test connector
and make sure that the idle speed is within specifi­
cations.
(Load Test)
11. Apply power steering, electrical, and air conditioner
loads and check that the idle speed is controlled
to within specifications.
I S C
v a l v e
E/L and A/C
76G04C-083

BAC Valve

Air valve

1. Remove the BAC valve from the throttle body.
2. Blow air through the valve from port A and check
that air comes out of port B when the BAC valve
is cold.
3. If not correct, replace the BAC valve.
(Refer to page 4B—44.)
76F04B-041
ISC SYSTEM
Idle speed
Load
750 ± 50
P/S
E/
800 ± 50
l
800 ± 50
A/C
800 ± 50
4B
4B—43