Dtc P0141: Secondary H02S (Sensor 2) Heater Circuit Malfunction - Honda Civic 2002-2003 Service Manual

PGM-FI System
DTe Troubleshooting (cont'd)
OTC P0141: Secondary H02S (Sensor 2)
Heater Circuit Malfunction
1. Resetthe ECM (see page 11-4).
2. Start the engine.
Is DTC P0141 indicated?
YES-Go to step 3.
NO-Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the secondary H02S (Sensor 2) and at the ECM .•
3. Turn the ignition switch OFF.
4. Disconnect the secondary H02S (Sensor 2) 4P
connector.
5. At the secondary H02S (Sensor 2) side, measure
resistance between H02S 4P connector terminals
No.3 and No.4.
SECONDARY H02S ISENSOR 21 4P CONNECTOR
1 2
3 4
Wire side of female terminals
Is there about 3.3
Q
?
YES-Go to step 6.
NO-Replace the secondary H02S (Sensor 2) .•
11-68
6. Check for continuity between body ground and
secondary H02S (Sensor 2) 4P connector terminals
No.3 and NO.4 individually.
SECONDARY H02S ISENSOR 2} 4P CONNECTOR
Wire side of female terminals
Is there continuity?
YES- Replace the secondary H02S (Sensor 2) .•
NO-Go to step 7.
7. Turn the ignition switch ON (II).
8. Measure voltage between secondary H02S 4P
connector terminals No.3 and No.4.
SECONDARY H02S (SENSOR 2) 4P CONNECTOR
S02SHTC
(BLK/WHTJ
2
3 4
IG1 (BLK/ORN)
Terminal side of male terminals
Is there battery Voltage?
YES-Go to step 9.
NO-Go to step 12.
9. Turn the ignition switch OFF.
10. Disconnect ECM connector E (31P).
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