Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Acura 3.5RL 1996-2004 Approved srm RL9604S11158A

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Main Menu Table of Contents

Intake Air System
Intake Manifold Runner Control (IMRC) System (cont'd)
No. 2 VACUUM
Troubleshooting Flowchart HOSE

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 VACUUM PUMP/
connect vacuum gauge to the GAUGE, 0 - 30 in.Hg
hose. A973X - 041 -
XXXXX

Check for vacuum at IMRC vacu-
NO um Resorvoir:
Is there vacuum? Disconnect the No. 4 hose on
IMRC solenoid, and connect a IMRC
YES vacuum gauge to the hose. DIAPHRAGM
VALVE 1

Repair the blockage or vacuum
NO leak between the IMRC vacuum
Is there vacuum?
reservoir and the intake mani-
fold.
YES

IMRC/ENGINE MOUNT CONTROL SOLENOID
Check for an open in the wire VALVE ASSY. 6P CONNECTOR (C108)
(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.

Wire side of female terminals

YES Replace the IMRC solenoid valve
Is there battery voltage?
1.
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) (To page 11-159)
Main Menu Table of Contents

(From page 11-158) (From page 11-158)

Repair open in wire between the
NO 6P connector and No. 20 ECU
Is there battery voltage?
(PCM) (20 A) fuse in the under-
dash fuse/relay box.
YES

PCM CONNECTOR A (26P)

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.

Wire side of
female
terminals
Check for vacuum at idle:
Remove No. 8 vacuum hose from NO Repair open in wire between
Is there continuity?
the IMRC diaphragm 2 and con- PCM (A20) and the 6P connector.
nect a vacuum gauge to the hose.
YES

Substitute a known-good PCM IMRC
and recheck (see page 11-42 for
DIAPHRAGM 2
immobilizer information). If symp-
tom goes away, replace the origi-
nal PCM.

VACUUM
PUMP/
Check for vacuum at IMRC vacu- GAUGE
um reservoir: A973X - 041 -
NO Disconnect the No. 4 hose on
Is there vacuum? XXXXX
IMRC solenoid valve 1 and con-
nect a vacuum gauge to the
YES
hose. No. 8 VACUUM
HOSE

Repair the blockage or vacuum
NO leak between the IMRC vacuum
Is there vacuum?
resorvoir and the intake mani-
fold.
YES

IAB/ENGINE MOUNT CONTROL SOLENOID
Check for an open in the wire VALVE ASSY. 6P CONNECTOR (C108)
(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.
Wire side of female terminals

(To page 11-160) (To page 11-160)
Main Menu Table of Contents

Intake Air System
Intake Manifold Runner Control (IMRC) System (cont'd)
(From page 11-159) (From page 11-159)

YES Replace the IMRC solenoid valve
Check for vacuum at 3,400 rpm: Is there battery voltage?
2.
1. Raise engine speed to 3,400
rpm. NO
2. Check for vacuum at No. 2 IMRC/ENGINE MOUNT CONTROL SOLENOID
vacuum hose. VALVE ASSY. 6P CONNECTOR (C108)

Check for an open in the wire (IG1
line):
Measure voltage between 6P con-
nector terminal No. 1 and body
ground.

Wire side of female
terminals

Repair open in wire between the
NO 6P connector and No. 20 ECU
Is there battery voltage?
(PCM) (20A) fuse in the under-
dash fuse/relay box.
YES

PCM CONNECTOR A (26P)

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.

Wire side of female terminals

NO Repair open in wire between
Is there continuity?
PCM (A22) and the 6P connector.
YES

Substitute a known-good PCM
and recheck (see page 11-42 for
immobilizer information). If symp-
tom goes away, replace the origi-
nal PCM.

Check the IMRC Solenoid Valve
YES 1:
Is there vacuum? Disconnect the 6P connector from
the IMRC/engine mount control
NO solenoid valve assembly.

YES Replace the IMRC solenoid valve
Is there vacuum?
1.
NO

(To page 11-161) (To page 11-161)
Main Menu Table of Contents

(From page 11-160) (From page 11-160)
PCM CONNECTOR A (26P)

Check for vacuum at 4,000 rpm: Check for a short in the wire
1. Raise engine speed to 4,000 (IABSC1 line):
rpm. 1. Turn the ignition switch OFF.
2. Check for vacuum at No. 8 2. Disconnect the PCM connec-
vacuum hose. tor A (26P) from the PCM.
3. Check for continuity between
PCM connector terminal A20
and body ground.
Wire side of female terminals

YES Repair short to ground at wire
Is there continuity? between PCM (A20) and the 4P
connector.
NO

Substitute a known-good PCM
and recheck (see page 11-42 for
immobilizer information). If symp-
tom goes away, replace the origi-
nal PCM.

Check the IMRC Solenoid Valve
YES 2:
Is there vacuum? Disconnect the 6P connector from
the IMRC/engine mount control
NO solenoid valve assy.

YES Replace the IMRC solenoid valve
2.
NO

Check for a short in the wire
(IABCS2 line):
1. Turn the ignition switch OFF.
2. Disconnect the PCM connec-
tor A (26P) form the PCM.
3. Check for continuity between
IMRC system is OK. PCM connector terminal A22
and body ground.

YES Repair short to ground at wire
Is there continuity to ground? between PCM (A22) and the 4P
connector.
NO

Substitute a known-good PCM
and recheck (see page 11-42 for
immobilizer information). If symp-
tom goes away, replace the origi-
nal PCM.

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