Honda 2004 Odyssey Service Manual page 439

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0135 '01 Model:
(Sensor 1) Heater Circuit Malfunction
DTC P0141 '01 Model:
(Sensor 2) Heater Circuit Malfunction
NOTE: Information marked with an asterisk ( ) applies
to DTC P0141.
1. Reset the PCM (see page 11-4).
2. Start the engine.
Is DT C P0135 or 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 primary HO2S (Sensor 1), the secondary HO2S
(Sensor 2) and the PCM.
3. Turn the ignition switch OFF.
4. Disconnect the HO2S (primary or secondary )
(Sensor 1 or Sensor 2 ) 4P connector.
5. At the HO2S side, measure resistance between
HO2S 4P connector terminals No. 3 and No. 4.
HO2S 4P CONNECTOR
Terminal side of
male terminals
Is there 10 40
YES Go to step 6.
NO Replace the primary HO2S (Sensor 1) or
secondary HO2S (Sensor 2) .
11-130
Primary HO2S
Secondary HO2S
*
Wire side of
female terminals
?
6. Check for continuity between body ground and
HO2S 4P connector terminals No. 3 and No. 4
individually.
HO2S 4P CONNECTOR
Terminal side of
male terminals
Is there continuity?
YES Replace the HO2S (primary or secondary )
(Sensor 1 or Sensor 2 ).
NO Go to step 7.
7. Start the engine.
8. Measure voltage between HO2S 4P connector
terminals No. 3 and No. 4.
PRIMARY/SECONDARY* HO2S (SENSOR 1/
SENSOR 2*) 4P CONNECTOR
IG1
(BLK/YEL)
SO2S
PO2S
HTC
HTC
(BLK/
(BLK/
WHT) WHT)*
Wire side of
female terminals
Is there battery voltage?
YES Go to step 9.
NO Go to step 12.
9. Turn the ignition switch OFF.
10. Disconnect PCM connector B (24P) (PCM connector
E, 31P) .
*
Wire side of
female terminals
*
IG1
(BLK/YEL)
Terminal side of
male terminals