Honda ACCORD HYBRID 2005 Service Manual page 634

EGR System
DTC Troubleshooting (cont'd)
15. Update the PCM if it does not have the latest
software, or substitute a k n o w n - g o o d PCM
(see page 11-6).
16. Test-drive under these conditions:
• Engine coolant temperature above 158 °F (70 °C)
• Transmission in D position
• Vehicle speed at 25 m p h (40 km/h) or more, and
engine speed between 1,100 r p m and 3,000 r p m
• During the drive, decelerate (with the throttle
fully closed) for 5 seconds
17. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
YES—If DTC P0401 is indicated, check for poor
connections or loose t e r m i n a l s at the EGR valve
and the PCM, then go to step 1. If any other
T e m p o r a r y DTCs or DTCs are indicated, go to the
indicated D T C s t r o u b l e s h o o t i n g .
NO—If the PCM was updated, troubleshooting is
complete. If the PCM w a s substituted, replace the
original PCM (see page 11-219). •
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