Honda Civic Service Manual page 447

fFosoo-l
lFosoil
Vehicle Speed Sensor (VSS) ('99 - 00 Models except Dl6Y5 engine with M/T)
T h e s c a n t o o | i n d i c a t e s D i a g n o s t i c T r o u b | e c o d e ( D T c ) P o 5 o 0 : A m a | f u n c t i o n p r o b l e m i n t h e V e h i c | e s
Sensor (VSS) circuit lexcept A//T (D16Y/, D16Y8 engine)l'
T h e s c a n t o o | i n d i c a t e s D i a g n o s t | c T r o u b | e C o d e ( D T C ) P o 5 o 1 : A r a n g e / p e r f o r m a n c e p r o b | e m i n t h e
SDeed Sensor {VSS) circuit tA,/T (D16Y7, D16Y8 engine)1.
ECM/PCM CONNECTORS
B {25P)
I
t
Wire side ol lemale terminals
ECM/PCM CONNECTORS
B E5PI
The MIL has been reported on
OTC P0500 or P0501 is stored.
Problem veritication:
1. Test-drive the vehicle.
2. Check the vehicle speed with
the scan tool
lntermitt6nt failure, sYstem is OK
at thb time. Check tor Poor con-
nections or loose wir6 at C117
{vss} .nd ECM/PCM
ls the correct sPeed indicated?
Check for an open in the ECM/
PCM:
1. Turn the ignition switch OFF.
2. Block the rear wheels and set
the parking brake
3. Jack uP the front ofthe vehicle
a n d s u p p o r t i t w i t h s a f e t y
stands.
4. Turn the ignition switch ON (ll).
5. Block the right front wheel and
s l o w l y r o t a t e t h e l e f t f r o n t
6, Measure voltage between the
E C M / P C M c o n n e c t o r t e r m i _
nals C23 and 820.
Substituto a known'good ECM/
PcM and rech€ck. ll sYmptom/
indic€tion goes awaY, lsplace the
original ECM/PCM.
D o e s t h e v o l t a g e P u l s e 0 V
a n d 5 V o r b a t t e r y v o l t a g e ?
Check for a short in the ECM/
PCM:
1. Turn the ignition switch OFF.
2 . D i s c o n n e c t t h e E c M / P c M
connector C (31P).
3. Turn the ignition switch ON (ll)
4 . B l o c k t h e r i g h t f r o n t w h e e l
and slowly rotate the left front
5. Measure voltage between the
ECM/PCM connector terminals
C23 and 820.
Substiiute . known-good ECM/
PCM and r6check. lf symptom/
indication goes awaY, rePlace
the origin.l ECM/PCM.
D o e s t h e v o l t a g e P u l s e 0 V
and 5 V or battery voltage?
- R e o a i r s h o r t i n t h e w i r e
between ECM/PCM {C23} and
vss. TcM.
- R e p a i . o p e n i n t h e w i r e
between ECM/PCM {C231 and
vss.
- lf wire is OK, tesr the VSS
{see sestion 23).
Wire side oI female terminals
1 1 -1 77