Symptom Troubleshooting Index; Cruise Control - Honda EP3 Service Manual

Cruise Control
Symptom Troubleshooting Index
NOTE:
' The numbers in the table showthetroubleshooting sequence.
. Before troubleshooting.
- check the No, 10 (7.5A) and No. 4 (10A) fuses in the under-dash fuse/relay box. and the No. 7 (15A)
fuse in the
under-hood fuse/relay box,
- check that the horn sounds.
- check the tachometer to see if it works properly.
- check the speedometer lo see if it works properly.
Symptom
Diagnostic procedure
Also check for
Cruise control cannot be
set
1. Check main switch (see page 4-42)
2. Check SET/RESUME/CANCEL
switch (see page 4-42)
3. Test brake pedal position switch (see page 22-84) and check
its adjustment {see page 19,6)
4. Test clutch pedal position switch (see page 4-45) and check
its adjustment (see page 12-41
5. Check cruise control unit {see page 4-40}
6. Check vehicle speed sensor (VSS) (see page 22-65)
. Poor ground:
G 5 0 1
. Open circuit,
loose or
disconnected
t e r m i n a l s :
L T G R N ,
BLI(ORN.
GRY/RED, BLU.
LT BLU,
BLUAA/HT
Cruise control can be set
but indicator light does
not go on
1. Check cruise control indicator bulb in gauge assembly {see
page 22-631
2. Check cruise control unit (see page 4-40)
. Poor ground:
G 5 0 1
. Open circuit,
loose or
disconnected
t e r m r n a t s :
YEL, BLUA/EL
a r , ' i . a c ^ a a . l i c
n o t i c e a b l y h i g h e r o r
lower than what was set
1. Check vehicle speed sensor (VSS) {see page 22-65)
Check cruise control actuator {see page 4-43)
2. Check cruise control unit (see page 4-40)
Excessive overshooting
or undershooting when
trying to set speed
1. Check cruise control actuator (see page 4-43)
2. Check vehicle speed sensor (VSS) (see page 22-65)
Check cruise control unit (see page 4-40)
3 .
Speed fluctuation on a
flat road with cruise
control set
1. Check vehicle speed sensor (VSS) (see page 22-65)
Check cruise control actuator (see page 4-43)
2. Check cruise control unit (see page 4-40)
Vehicle does not
decelerate or accelerate
accordingly when SET/
RESUME/CANCEL button
i s p u s h e d
1. Check SET/RESU ME/CANCEL switch (see page 4-42)
2. Check cruise control unit {see page 4-40)
Open circuit, loose
or disconnected
t e r m i n a l s :
GRY/RED,
LT GRN/BLK
Set speed does not
cancel (engine rpm stays
h i g h ) w h e n c l u t c h p e d a l
is pushed
1. Testclutch pedal position switch (see page 4-45) and check
its adjustment (see page 12-4)
2. Check cruise control unit (see page 4-40)
Short to ground in
the LT BLU wire
Set speed does not
cancel when brake pedal
i s p u s h e d
'1.
Test brake pedal position switch (see page 22-84) and check
its adjustment (see page 19-6)
2. Check cruise control unit (see page 4-40)
Open circuit, loose
or disconnected
t e r m i n a l s :
WHT/BLK
4-38
g ,