Honda Civic Service Manual page 750

From page 14-70
Mea3uro Main3haft speed sensor
Resistance:
1. Connect the ma;nshaft sPeed
sensol 2P connector,
2 . [ / l e a s u r e t h e
r e s i s t a n c e
between the 815 and 814 ter_
m i n a l s .
Run the Electical TrouH€.hooting
Flowcirrt for cod. P0720 l9l.
Check for loose P1CM connoctors.
ll n€cesslrY, 3ubstitute a known'
good PCM and racheck.
ls the resistance 400 - 600 O?
Check NM wire Continuityl
1. Disconnect the 2P connector
from the mainshaft speed sen'
sor connector.
2. Check for continuity between
the 815 terminal and the No. 1
t e r m i n a l o f t h e m a i n s h a f t
speed sensor connector.
Rgpsi. opon in thc wira bctwg€n
the 815 torminrl and th6.tain_
shatt soeod lensoa,
Check NMSG Wire ContinuitYr
Check for continuity between the
814 terminal and the No.2 termi
nal of the mainshaft sp€ed sensor
connector,
Repair open in the wira botwGon
the 814 terminal and lhe main'
shsft spo€d 3en3or.
Check for loo3o PCM connoctoB.
ll neca$8ry, subditute a known-
good PCM and rgchock.
PCM CONNECTOR B I25PI
Wire side oI female termlnals
MAINSHAFT SPEED SENSOR
CONNECTOR
14-71