Intake Manifold Runner Control (Imrc); Description - Acura 3.5 RL Manual

Intake Manifold Runner Control (IMRC) System

Description

Satisfactory power performance is achieved by closing and opening the intake manifold runner control (IMRC) valves.
High torque at low RPM is achieved when the valves are closed, whereas high power at high RPM is achieved when the
valves are opened.
INTAKE MANIFOLD RUNNER CONTROL
(IMRC) SOLENOID VALVE 1 OFF
ENGINE SPEED IS ABOVE 3,200 rpm
IMRC SOLENOID VALVE 2
IMRC
SOLENOID
VALVE!
IMRC
DIAPHRAGM 1
IMRC
DIAPHRAGM 2
INTAKE
MANIFOLD
IMRC
VALVE 1: OPEN
IMRC
VALVE 2: CLOSED
VACUUM
RESORVOIR
IAC
VALVE
VACUUM
CHECK
VALVE
ENGINE
COOLANT
IDLE AIR
CONTROL
THERMAL
IDLE
VALVE
ADJUSTING
SCREW
THROTTLE BODY
INTAKE MANIFOLD RUNNER CONTROL
(IMRC) SOLENOID VALVE 2 OFF
ENGINE SPEED IS ABOVE 3,800 rpm
From PGM-FI
MAIN RELAY
From No. 20 ECU
(PCM) (20 A)
FUSE
(in the under-dash
fuse/relay box)
VARIOUS
SENSORS
IMRC
VALVE 1: CLOSED
IMRC
INTAKE
VALVE 2: CLOSED
AIR
DUCT
IMRC
VALVE 1
IMRC
VALVE 1: OPEN
IMRC
VALVE 2: OPEN
IMRC
VALVE 2
IMRC
DIAPHRAGM 2
IMRC
DIAPHRAGM 1