Honda Civic Service Manual page 772

Troubleshooting Flowchart - Countershaft Speed Sensor
NOTE: Record all freeze data before you troubleshoot
Po$iblo Cause
. Loos€ or fsulty conneclion
between the PCM and vehicle
hainoss
' Disconnectod countersh.ft
spoed senaof connoctor
. Short or opgn in counteBhaft
3Deed aensor wire
. Faulty counloEhaft 3p€ed sen'
soa
COUNTERSHAFf SPEED
SENSOR CONNESTOR
Terminal side oI male terminals
FCM CONNECTOR D I16PI
rconl c
1+93
NC IBLUI
. OBD ll Scan Tool indicat6 Code
PO720.
. Self-diagnosis E indicator light
blinks nin6times.
C h e c k t h e c o u n t e r s h a f t s P e e d
sensor installation, and check it
lor damage.
ls the countershaft speed sensor
installed properly, and not dam-
aged?
Reinstall or replace and rechock.
Measurg Counlershatt SPeed
Sgn3ol R6istance at tho Son3ol
Connector:
1. Disconnect the 2P connector
from the countershaft sPeed
sensor.
2, Measuro countershaft sPeed
sensor resistanca at the sensor
connector.
ls the resistance 400 - 600 O?
Chcck CounteEh.tt SPeed Sen'
sor lor a Short Circuit:
1 . D i s c o n n e c t t h e D { 1 6 P ) c o n
nector trom the PCM.
2. Check lor continuity between
body ground and the D10 ter_
minal and D16 terminal indi-
vid!ally.
R6oai. short in tl|€ wi.6a bstwa€n
the D10 and D16 t.rminali end
tho countdthatt rP€od senaor.
T o p a g e 1 4 9 4
Wire side of temale terminals