Honda Civic Service Manual page 413

Primary Heated Oxygen Sensor (Primary HO2SI (Sensor 1)
('96 - 9b Models except Dl6Y5 engine with M/Tl
PHO29
IWHT}
The scan tool indicates Diagnostic Trouble Code (DTC) P0132: A high voltage problem in the Primary Heated
Oxygen Sensor (Primary H02S) (Sensor'l) circuit.
PRIMARY HO2S (Sonso.
'll 4P CONNECToR
tc123t
sG2
IGRN/
BLKI
Wire side ot female terminals
ECM/PCM CONNECTOR D I16PI
JUMPER WIRE
PHO2S (WHT}
SG2 IGRN/BLKI
Wire side of tem6le terminals
Probl€m verification:
1. Do the ECM/PCM Reset Pro-
cedure.
2 . S t a r t t h e e n g i n e . H o l d t h e
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on
3. Test-drive with the A/T in E
position (M/T in 4th gear)
4 . C h e c k t h e P r i m a r Y H O 2 S
(Sensor 1) oLltPut voltage with
the scan tool during decelera'
tion using completely closed
throttle.
Int.rmittont fiilur., system it OK
at thb timo. Chock for Poot con-
nections or loo3a wir63 at Cl23
lPrimarY HO2S, SensoJ 1l .nd
ECM/PCM.
Does the voltage stay at 1.0 V
or more?
Check for an open in the Primary
HO2S:
1. Turn the ignition switch OFF.
2. Disconnect the Primary HO2S
(Sensor 1) 4P connector'
3 . C o n n e c t t h e P r i m a r Y H O 2 5
lSensor l) 4P connector termi-
n a l s N o . 1 a n d N o . 2 w i t h a
4. Turn the ignition switch ON (ll).
5 . C h e c k t h e P r i m a r Y H 0 2 S
(Sensor 1i outPut voltage with
the scan tool.
lsthere 1.0 V or more?
Check for an open in the wiro
{PHO2S line):
1. Turn the ignition switch OFF.
2. Connect EcM/PcM connector
t e r m i n a l s D 7 a n d D 1 1 w i t h a
jumper wrre,
3. Turn the ignition switch ON lll)
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,
Replir open in tho wirc b€twccn
E C M / P C M l o ? ) a n d P r i m ! . Y
HO2S lsonsor 1).
ls there 1.0 V or more?
Substitute
a known-good ECM/
PCM and recheck. lf 3ymptom/
i n d i c e t i o n g o o s a w e y , r o p l a c e
the oliginal ECM/PCM.
11-143