Honda 2004 Odyssey Service Manual page 144

8. Raise the engine speed above 1,000 rpm.
9. Measure voltage between the engine mount
control solenoid valve 2P connector No. 1 terminal
and No. 2 terminal.
ENGINE MOUNT CONTROL
SOLENOID VALVE 2P CONNECTOR
IG 1
(BLK/YEL)
Is there battery voltage?
YES Repair a short to body ground in the wire
between PCM connector terminal A2
(1999-2000, 2002-2004 models) or E24 (2001 model)
and the engine mount control solenoid valve
connector. If the wire is OK, substitute a known-
good PCM and recheck (see page 11-5).
NO Go to step 10.
10. Connect the engine mount control solenoid valve
2P connector.
11. Disconnect the upper vacuum hose (A) from the
engine mount control solenoid valve (B), and
connect a vacuum pump/gauge to the hose. Apply
vacuum for 20 seconds.
B
Does the engine mount hold vacuum?
YES Go to step 12.
NO Either the vacuum hose or front engine mount
has a vacuum leak. Repair as needed.
MCS
(GRN/WHT)
Wire side of
female terminals
A973-041-XXXXX
A
12. Release the vacuum, then apply vacuum again.
Is there a noticeable change in idle smoothness
with and without vacuum applied ?
YES Go to step 13.
NO Replace the front engine mount.
13. Disconnect the upper vacuum hose (A) from the
engine mount control solenoid valve (B) and
connect a vacuum pump/gauge to a hose
connected to the engine mount control valve.
B
A
Is there manif old vacuum at idle, and a decrease
in manif old vacuum when you raise the engine
speed above 1,000 rpm?
YES Replace the engine mount control solenoid
valve.
NO A hose is restricted or the intake manifold part
is plugged.
A973X-041-XXXXX
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