Honda Accord 2008 Manual page 457

07/11/02 09:05:01 61TA0000_110_0138
PGM-FI System
DTC Troubleshooting (cont'd)
12. Monitor the ENGINE SPEED in the DATA LIST with
the HDS, and hold the engine speed at 2,500 rpm
for at least 30 seconds.
13. While holding the engine speed at 2,500 rpm, check
the MAF SENSOR in the DATA LIST with the HDS.
Is there about 5.6 7 .8 gm/ s ( M/ T ) or
6.5 9.1 gm/ s ( A/ T )?
−
YES − Go to step 14.
NO − Replace the MAF sensor/IAT sensor (see page
11-227), then go to step 20.
14. Turn the ignition switch to LOCK (0).
15. Allow the engine to cool to ambient temperature.
16. Note the ambient temperature.
17. Turn the ignition switch to ON (II).
18. Note the value of IAT SENSOR quickly in the DATA
LIST with the HDS.
19. Compare the value of the IAT SENSOR and the
ambient temperature.
Does the value of the IAT SENSOR dif f er 5.4 °F
( 3 °C) or more?
−
YES Replace the MAF sensor/IAT sensor
(see page 11-227), then go to step 20.
NO − Check for dirt, carbon, or damage in the
throttle bore. If there is dirt or carbon, clean the
throttle body (see page 11-385), then go to step 20.
If there is damage in the throttle bore, replace the
throttle body (see page 11-388), then go to step 20.
11-138
−
20. Turn the ignition switch to ON (II).
21. Reset the ECM/PCM with the HDS.
22. Do the ECM/PCM idle learn procedure (see page
11-343).
23. Let the engine cool until the value of ECT SENSOR
1 is 122 °F (50 °C) or less.
24. Start the engine, and let it idle for 10 seconds or
more.
25. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P050A indicated?
YES − Check for poor connections or loose
terminals at the throttle body, the MAF sensor/IAT
sensor, and the ECM/PCM, then go to step 1.
−
NO Go to step 26.
26. Monitor the OBD STATUS for DTC P050A in the
DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES − Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 25,
go to the indicated DTC's troubleshooting.
−
NO If the screen indicates FAILED, check for poor
connections or loose terminals at the throttle body,
the MAF sensor/IAT sensor, and the ECM/PCM,
then go to step 1. 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 23.