Primary Heated Orygen Sensor - Honda Civic Service Manual

PGM-FI System
( F r o m p a g e 1 1 - 1 3 9 )
Check for a shon in the HO2S:
1. Turn the ignition switch OFF.
2. Disconnect the Primary HO2S
(Sensor 1) 4P connector.
3. Start the engine and let it idle.
4 . C h e c k t h e P r i m a r y H O 2 S
(Sensor 1)output voltage with
the scan tool,
Does it stay at 0.1 V or less?
Check for a short in lhe wire
(PHO2S linel:
1. Turn the ignition switch OFF.
2. Disconnect the ECM/PCM con-
nector D ('l6P).
3. Check for continuity between
the Primary HO2S lsensor 1)
4 P c o n n e c t o r t e r m i n a l N o . 1
and body ground.
Repair short in lhe wire b6tw6en
ECM/rcM (D7) and Primary llO2S
{Sensor 1}.
Substitute a known-good ECM/
PCM and recheck. ll symptom/
indication goes awry, replaco the
original ECM/PCM.
Primary Heated Oxygen Sensor (Primary HO2S) (sensor 1l
('96 - 98 Models except Dl6Y5 engine with M/T) (cont'dl
PRIMARY HO2S lsonsor 1l ,tP CONNECTOR lC123l
Wire side of female terminals
1 1-1 4 0