Ecm Inputs And Outputs At Connector C (31P) - Honda S2000 Service Manual

Fuel and Emissions Systems
System Descriptions (cont'd)
ECM Inputs and Outputs at Connector C (31P}
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
PO2SHTC (PRIMARY HEATED
Drives primary heared oxygen
OXYGTN SENSOF HFATER sensor healer.
With fully warmed up engine running: dut,
a l t e r n a t o r c o n t r o l W i t h f u l l y w a r m e d u p e n g i n e r u n n i n g t a b o u t I V
s i g n a l . W i t h e n g i n e r u n n i n g a t l o w e l e c t r i c a l t o a d : a b o u t
N o . 1 i g n i t i o n c o i l . W i t h i g n i l i o n s w r t c h O N { l l i . 0 V
Detects alternator FR signal.
up engine running: 0 V battery
e n g i n e a t l o w e n g i n e s p e e d l
W i t h e n g i n e a t h i g h e n g i n e s p e e d ( v e h i c l e
HEAIED OXYGEN SENSOR
oxygen sensor heater. With fully warmed up engine running: duty
With ignition switch ON {ll):
With engine runningi pulses
SHO2S (SECONDARY
HEATED Derects secondary heated
OXYGEN SENSOR, SENSOR 2)
oxygen sensor (sensor 2)
o p e n e d f r o m i d l e w i t h f u l l y ,
warmed up enginer above 0.6 V
OXYGEN SENSOR, SENSOR 1)
oxygen sensor (sensor 1)
w a r m e d L r p e n g ' n e : a b o v e 0 . 6 V
W i t h i g n i t i o n s w i t c h O N { l l ) : a b o u t 3 V
s w i t c h O N ( l l ) : a b o u t 5 V
V C C ' r S I - \ S O R V O L T A G E )
P o w e r s o u r c e t o M A P s e n s o r
.:,