Acura 3.5 RL Manual page 448

Intake Air System
Intake Manifold Runner Control (IMRC) System (cont'd)
Troubleshooting Flowchart
Inspection of IMRC System.
Check for vacuum at idle:
1. Start engine and allow it to
idle.
2. Remove No. 2 vacuum hose
from the IMRC diaphragm, and
connect vacuum gauge to the
hose.
Is there vacuum?
YES
(To page 11-159)
VACUUM PUMP/
GAUGE, 0 - 30 in.Hg
A973X - 041 -
XXXXX
Check for vacuum at IMRC vacu-
um Resorvoir:
NO
Disconnect the No. 4 hose on
IMRC solenoid, and connect a
vacuum gauge to the hose.
Is there vacuum?
YES
Check for an open in the wire
(IABCS1 line):
1. Turn the ignition switch OFF.
2. Disconnect the 6P connector
from the IMRC/engine mount
control solenoid valve assy.
3. Start engine and allow it to
idle.
4. Measure voltage between 6P
connector terminal No. 2 and
No. 5.
Is there battery voltage?
NO
Check for an open in the wire (IG1
line):
Measure voltage between 6P con-
nector terminal No. 2 and body
ground.
(To page 11-159)
No. 2 VACUUM
HOSE
IMRC
DIAPHRAGM
VALVE 1
Repair the blockage or vacuum
NO
leak between the IMRC vacuum
reservoir and the intake mani-
fold.
IMRC/ENGINE MOUNT CONTROL SOLENOID
VALVE ASSY. 6P CONNECTOR (C108)
Wire side of female terminals
YES
Replace the IMRC solenoid valve
1.