5. FUEL INJECTION SYSTEM
MOVIE S 150i
AIR IDLE BYPASS VALVE
INSPECTION
Connecting the Fi diagnostic tool to enter the
data analysis.
Check the ISC motor if the function is normal.
ELECTRONIC CONTROL UNIT
(ECU)
REMOVAL
1. Remove the front cover
2. Remove the ECU protector
3. Remove the connector of ECU
4. Remove the ECU
Do not disconnect or connect the ECU
connector during the ignition switch
"ON"; it may cause the ECU damage.
The throttle position sensor (TPS) and
idle air bypass valve (ISC) have to
reset when the throttle body MAP,
TPS, ISC or ECU has been
reinstalled.
Battery connected and Key On, without
pulling off or connect on ECU (incl. cutting
and connecting)
1. Confirm Key Off status
2. Replace with a new ECU
3. Key On and perform Idle and full open ECU
the throttle Position (TPI) for twice
learning.
4. Warming at Idle for 15 minutes.
Throttle valve body is deposited with dirt
and unable to replace or clean: (Suggested
to replace with new ECU at the time of
cleaning throttle valve body)
1. Confirm at Key Off status
2. Replace ECU
3. Key On and perform 2 to 3 times of TPI
Idle and Fully Open learning (telling
ECU the present setting of Throttle)
4. Warming up for 15 minutes at Idle for ECU's connector
automatic learning of ABV (Telling ECU
the compensating volume of bypass air
5. APC learning, large and small circulation.
(Telling ECU engine compensation)
5-30