Engine Mount Control System Troubleshooting - Honda 2002 Accord Manual

Troubleshooting
Special Tools Required
V a c u u m Pump/Gauge, 0 — 30 in.Hg
A973X-041-XXXXX
NOTE: Check the v a c u u m hoses and lines for damage
and proper connections before troubleshooting.
Follow this procedure if the engine vibrates excessively
w h e n idling.
1. W a r m up the engine t o normal operating
temperature (the cooling fan comes on twice).
Is the idle speed less than 800 rpm?
Y E S G o t o step 2.
N O - Adjust the idle speed (see page 1 1 - 1 1 0 ) . •
2. Fully depress the brake pedal.
3. With the transmission in gear, have an assistant
disconnect and reconnect the 2P connector f r o m
the engine m o u n t control solenoid valve.
Is there a noticeable change in idle smoothness
when the 2P connector is disconnected?
Y E S — Reconnect the 2P connector to the solenoid
valve. The engine mount control system is O K . B
N O - G o to step 4.
4. Shift to HI or E position.
5. Disconnect the 2P connector f r o m the engine
mount control solenoid valve.
6. Measure voltage between the No. 2 terminal and
body g r o u n d .
E N G I N E M O U N T C O N T R O L
S O L E N O I D V A L V E C O N N E C T O R
W i r e s i d e o f
f e m a l e t e r m i n a l s
Is there battery voltage?
Y E S ~ Go t o step 7.
NO— Repair open in BLK/YEL wire between the 2P
connector and No. 6 (15 A) fuse in the driver's
under-dash fuse/relay b o x . H
7. Measure voltage between the No. 1 and No. 2
terminals.
E N G I N E M O U N T C O N T R O L
S O L E N O I D V A L V E C O N N E C T O R
G R N / W H T
W i r e s i d e o f
f e m a l e t e r m i n a l s
B L K / Y E L
Is there battery voltage?
Y E S - G o t o step 8.
NO Repair open in GRN/WHT wire between
Powertrain Control Module (PCM) (A2) and the 2P
connector. If the wire is OK, substitute a known-
good Powertrain Control Module (PCM) and
recheck (see page 1 1 - 3 ) . •
(cont'd)
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