Acura 3.5 RL Manual page 449

(From page 11-158)
Check for vacuum at idle:
Remove No. 8 vacuum hose from
the IMRC diaphragm 2 and con-
nect a vacuum gauge to the hose.
Is there vacuum?
YES
(To page 11-160)
(From page 11-158)
Is there battery voltage?
YES
Check for an open in the wire
(IABCS1 line):
1. Turn the ignition switch OFF.
2. Check for continuity between
PCM connector terminal A20
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 for vacuum at IMRC vacu-
um reservoir:
NO
Disconnect the No. 4 hose on
IMRC solenoid valve 1 and con-
nect a vacuum gauge to the
hose.
Is there vacuum?
YES
Check for an open in the wire
(IABCS2 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. 1 and
No. 4.
(To page 11-160)
Repair open in wire between the
NO
6P connector and No. 20 ECU
(PCM) (20 A) fuse in the under-
dash fuse/relay box.
PCM CONNECTOR A (26P)
NO
Repair open in wire between
PCM (A20) and the 6P connector.
11-42 for
VACUUM
PUMP/
GAUGE
A973X - 041 -
XXXXX
No. 8 VACUUM
HOSE
Repair the blockage or vacuum
NO
leak between the IMRC vacuum
resorvoir and the intake mani-
fold.
IAB/ENGINE MOUNT CONTROL SOLENOID
VALVE ASSY. 6P CONNECTOR (C108)
Wire side of female terminals
Wire side of
female
terminals
IMRC
DIAPHRAGM 2