Dtc Troubleshooting - Honda Accord 2008 Manual

07/11/02 09:17:08 61TA0000_110_0332
Idle Control System

DTC Troubleshooting

DTC P0506: Idle Control System RPM Lower
Than Expected
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
4. Check under these DATA LIST parameter
conditions with the HDS:
• ECT SENSOR 1 above 156 °F (70 °C)
• IAT SENSOR above 32 °F (0 °C)
• VSS is 0 mph (0 km/h)
• ST FUEL TRIM between 0.69 1.47
• FSS is CLOSED
5. Monitor the OBD STATUS for DTC P0506 in the
DTCs MENU with the HDS.
Does the screen indicate F AILED?
YES − Go to step 6.
−
NO If the screen indicates PASSED, go to step 15.
If the screen indicates EXECUTING, keep idling
until a result comes on. If the screen indicates OUT
OF CONDITION or NOT COMPLETED, go to step 4
and recheck.
6. Remove the intake air duct from the throttle body
(see page 11-388).
11-332
7. Check for dirt, carbon, or damage in the throttle
8. Replace the throttle body (see page 11-388).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see page
− 11. Start the engine. Hold the engine speed at
12. Check under these DATA LIST parameter
13. Check for Temporary DTCs or DTCs with the HDS.
ＴＡ０８ＡＥＡＫ７２１０００９０５０６ＦＡＡＴ３０
bore.
Is there dirt, carbon, or damage in the throttle
bore?
YES − If there is dirt or carbon, clean the throttle
body (see page 11-385). Also check for damage to
the air cleaner element (see page 11-386), 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 9.
11-343).
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
conditions with the HDS:
• ECT SENSOR 1 above 156 °F (70 °C)
• IAT SENSOR above 32 °F (0 °C)
• VSS is 0 mph (0 km/h)
−
• ST FUEL TRIM between 0.69 1.47
• FSS is CLOSED
Is DT C P0506 indicated?
YES − Go to step 19.
NO − Go to step 14.