Honda CR-V 1997 Service Manual page 323

Heated Oxygen Sensor (H02S) Heater
I
P0135
I
I
P0141
I
The scan tool indicates Diagnostic Trouble Code (DTC) P0135: A problem in the Primary Heated Oxygen Sensor
(Primary H02S) (Sensor 1) Heater circuit.
The scan too) indicates Diagnostic Trouble Code (DTC) P0141: A problem in the Secondary Heated Oxygen Sensor
(Secondary H02S) (Sensor 2) Heater circuit.
- The MIL has been reported on.
- Ole P0135, and/or P0141 are
stored.
I
Problem verification:
,
, Do the ECM/PCM Reset Pro-
cedure.
2,
Start the engine.
I
Is
Ole
P013S or P0141 indi-
cated?
YES
Ch.c:k tor an open or short i.n the
H02S:
,
,
Turn the ignition switch OFF.
2,
Disconnect the H02S (Primary
or Secondary .... ) (Sensor 1 or
Sensor 2) 4P connector.
3, At the H02S side. measure
resistance between the H02S
4P
connector
terminals NO.3
and NO. 4.
Is there 10 - 40 O?
"-
/
YES
Check for continuity between
body ground and the H02S 4P
connector termi na ls No.3 and
NO. 4 individually.
Is there continuity?
NO
Check for an open or short in the
wir •• (P02SHTC, S02SHTC·
line):
1. Turn the ignition switch ON
(II) .
2,
Measure voltage between the
H02S 4P connector terminals
No. 3 and No. 4.
Is
there battery voltage?
NO
~
Y
('97 model: To page 11·122)
('98 - 00 models: To page 11·123)
It: P014l
"-
/
"-
/
NO
NO
I
I
YES
I
I
YES
Intermittent failure, system
i.
OK
at tht. tim •. Check for poor con-
nKtlonl or loose wires at
el11
(P,imary H02S. Sensor 1), e127
(located on ECM/PCM bracket),
e721 (Secondary H02S. Sensor
21· and .t the
ECM/PCM ,
Replace the H02S (Primary or
Secondary-).
Replace the H02S (Primary or
Secondary·).
~
('97 model: To page 11 · 122)
('98
- 00 models: To page 11-123)
PRIMARY H02S 1 _ , 11 4P
CONIIECTOR IClll1. SECONDARY
H02S I S - 21 4P CONNECTOR
1C72".
Terminal side of male terminals
1 2
PRIMARY H02S ISonoor 1) 4P
CONNECTOR IClll I. SECONDARY
H02S ISonoor 21 4P CONNECTOR
1C7211·
101
~
P02SHTC
IBLK/ 1 2 IBLK/
YELl 3 4 WHTI
S02SHTC IGl
IBLK/wHTJ·
't
IBLK/wHTJ·
Wire side of female terminals
(conl'd)
11-121