DESCRIPTION
This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is between 0 and 4450 rpm and the throttle valve opening angle is 60 or more, the ECM supplies current to the VSV (ON status), to close the IACV. Under other conditions, the VSV is usually OFF and the IACV is open.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VSV FOR ACIS)
OK: Operational noise can be heard.
2 CHECK INTAKE AIR CONTROL VALVE (OPERATION)
OK: Operational noise can be heard.
3 CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM)
Standard resistance : Check for open
Check for short
4 INSPECT FUSE (EFI NO. 2 FUSE)
Standard resistance: Below 1 Ω
5 CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - EFI RELAY)
Standard resistance : Check for open
CHECK ECM POWER SOURCE CIRCUIT
Drive information
Average fuel economy*1, 2
Displays the average fuel consumption since the function was
reset.*3
Tank average fuel economy*1, 2
Displays the average fuel consumption since the vehicle was refueled.
Trip average fuel economy*1, 2
Displays the average fuel consumption since the engine wa ...
Diagnosis system
1. CHECK DLC3
The ECU uses ISO 15765-4 for communication.
The terminal arrangement of the DLC3 complies
with SAE J1962 and matches the ISO 15765-4
format.
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ig ...
Removal
HINT:
Use the same procedures for the RH side and LH side.
The procedures listed below are for the LH side.
1. PRECAUTION
CAUTION:
Be sure to read "PRECAUTION" thoroughly before
servicing.
2. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
NOTICE:
Wait for 90 se ...