Acura 3.5 RL Manual page 450

Intake Air System
Intake Manifold Runner Control (IMRC) System (cont'd)
(From page 11-159)
Check for vacuum at 3,400 rpm:
1. Raise engine speed to 3,400
rpm.
2. Check for vacuum at No. 2
vacuum hose.
Is there vacuum?
NO
(To page 11-161)
(From page 11-159)
Is there battery voltage?
NO
Check for an open in the wire (IG1
line):
Measure voltage between 6P con-
nector terminal No. 1 and body
ground.
Is there battery voltage?
YES
Check for an open in the wire
(IABCS2 line):
1. Turn the ignition switch OFF.
2. Check for continuity between
PCM connector terminal A22
and body ground.
Is there continuity?
YES
Substitute a known-good PCM
and recheck (see page
immobilizer information). If symp-
tom goes away, replace the origi-
nal PCM.
Check the IMRC Solenoid Valve
1:
YES
Disconnect the 6P connector from
the IMRC/engine mount control
solenoid valve assembly.
Is there vacuum?
NO
(To page 11-161)
YES
Replace the IMRC solenoid valve
2.
IMRC/ENGINE MOUNT CONTROL SOLENOID
VALVE ASSY. 6P CONNECTOR (C108)
Repair open in wire between the
NO
6P connector and No. 20 ECU
(PCM) (20A) fuse in the under-
dash fuse/relay box.
PCM CONNECTOR A (26P)
Wire side of female terminals
NO
Repair open in wire between
PCM (A22) and the 6P connector.
11-42 for
YES
Replace the IMRC solenoid valve
1.
Wire side of female
terminals