Download Lotus Service Notes Section EMR

Lotus Service Notes
Section EMR
Air intake control valve circuit
P1113
Air intake control valve circuit
Description:
The air cleaner is equipped with 2 inlets, one of which is opened or closed by the Air Intake Control Valve (AICV).
This system reduces intake noise and increases engine power.
When the engine is operating in the low-to-mid speed range, the ECM deactivates the Vacuum Solenoid Valve
(VSV) and allows the AICV to close one of the air cleaner inlets. When the engine speed is greater than a
specified value the ECM activates the VSV and the applied vacuum activates the AICV to open both of the air
cleaner inlets.
Component connections
Connector Description
1 Ignition supply (fuse R8) 2 VSV control ECU Pin
-
B1
ECU Connector
48 Way (Central)
Monitor:
• Continuous
Enable Criteria:
• Engine running
Disable Criteria:
• None
Potential failure modes:
• VSV open circuit or short to ground
• VSV circuit short to ECU
Diagnostic Mask:
• The service light will be illuminated for 30 seconds after engine start if the fault has been present for the
previous two trips.
Page 67