Honda ACCORD HYBRID 2005 Service Manual page 565

DTC Troubleshooting
DTC P0506: Idle Control System RPM Lower
Than Expected
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 rpm w i t h o u t load (in Park or neutral) until the
radiator fan comes on, then let it idle.
4. Check this data in the DATA LIST w i t h the HDS:
• Engine coolant temperature above 158 °F (70 °C)
• Intake air temperature above 32 °F (0 °C)
• Vehicle speed is 0 m p h (0 km/h)
• ST FUEL TRIM between 0.73 and 1.47
• FSS is CLOSED
5. Monitor the OBD STATUS for DTC P0506 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, go to step 15.
If the screen indicates EXECUTING, let the engine
idle until a result comes on. If the screen indicates
OUT OF CONDITION, go to step 4 and recheck.
6. Remove the intake air duct f r o m the throttle body.
7. Check for dirt, carbon, or damage in the throttle
bore.
Is there dirt, carbon, or damage in the throttle
bore?
YES—If there is dirt or carbon, clean the throttle
body (see page 11-381), and also check for a
restricted air cleaner element (see page 11-382),
then go to step 9. If there is damage in the throttle
bore, go to step 8.
NO—Check the A/C system or power steering
system, then go to step 17.
8. Replace the throttle body (see page 11-386).
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. Check this data in the DATA LIST w i t h the HDS:
• Engine coolant temperature above 158 °F (70 °C)
• Intake air temperature above 32 °F (0 °C)
• Vehicle speed is 0 m p h (0 km/h)
• ST FUEL TRIM between 0.73 and 1.47
• FSS is CLOSED
(cont'd)
11-325