Honda ACCORD HYBRID 2005 Service Manual page 412

PGM-FI System
D T C T r o u b l e s h o o t i n g (cont'd)
DTC P2270: Rear Secondary H02S (Bank 1,
Sensor 2) Circuit Signal Stuck Lean
DTC P2271: Rear Secondary H02S (Bank.1,
Sensor 2) Circuit Signal Stuck Rich
DTC P2272: Front Secondary H02S (Bank 2,
Sensor 2) Circuit Signal Stuck Lean
DTC P2273: Front Secondary H02S (Bank 2,
Sensor 2) Circuit Signal Stuck Rich
NOTE: Information marked w i t h an asterisk (*) applies
to the front bank (Bank 2).
1. Turn the ignition switch ON (II).
2. Clear the DTC w i t h the HDS.
3. Start the engine. Hold the engine speed at
3,000 r p m w i t h o u t load (in Park or neutral) until the
radiator fan comes on, then let it idle.
4. Test-drive under these conditions:
• Engine coolant temperature above 176 °F (80 °C)
• Vehicle speed between 35 m p h (56 km/h) and
55 m p h (88 km/h)
• Drive 1 minute or more
5. M o n i t o r the OBD STATUS for DTC P2270, P2271,
P2272* and/or P2273* in the DTCs MENU w i t h the
HDS.
Does the screen indicate FAILED?
Y E S — G o t o step 6.
NO—If the screen indicates PASSED, intermittent
failure, system is OK at this t i m e . Check for poor
connections or loose terminals at the secondary
H 0 2 S (Sensor 2) and the PCM. If the screen
indicates EXECUTING, keep d r i v i n g until a result
c o m e s on. If the screen indicates OUT OF
CONDITION, go to step 3 and recheck.
6. Turn the ignition switch OFF.
7. Replace the secondary H 0 2 S (Sensor 2) (see page
11-214).
8. Turn the ignition switch ON (II).
9. Reset the PCM w i t h the HDS.
10. Do the PCM idle learn procedure (see page 11-340).
11. Start the engine. Hold the engine speed at
3,000 rpm w i t h o u t load (in Park or neutral) until the
radiator fan comes on, then let it idle.
12. Test-drive under these conditions:
• Engine coolant temperature above 176 °F (80 °C)
• Vehicle speed between 35 m p h (56 km/h) and
55 m p h (88 km/h)
• Drive 1 minute or more
13. Check for Temporary DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
Y E S - l f DTC P2270, P2271, P2272* and/or P2273* is
indicated, check for poor connections or loose
terminals at the secondary H 0 2 S (Sensor 2) and
the PCM, then go to step 1. If any other Temporary
DTCs or DTCs are indicated, go to the indicated
DTCs troubleshooting.
NO—Go to step 14.
14. Monitor the OBD STATUS for DTC P2270, P2271,
P2272* and/or P2273* in the DTCs MENU with the
HDS.
Does the screen indicate PASSED?
Y E S — T r o u b l e s h o o t i n g is complete. •
NO—If the screen indicates FAILED, check for poor
connections or loose terminals at the secondary
H 0 2 S (Sensor 2) and the PCM, then go to step 1. If
the screen indicates EXECUTING, keep driving until
a result comes on. If the screen indicates OUT OF
CONDITION, go to step 11 and recheck.
11-172