A/T - Harsh Or Noisy Downshifts When Slowing Down

SOURCE:
Honda Service News December 2004

TITLE:
Harsh or Noisy Downshifts When Slowing Down

APPLIES TO:
2002-04 CR-Vs or 2003-04 Element

SERVICE TIP:
Are owners of A/T-equipped 2002-04 CR-Vs or 2003-04 Elements complaining of harsh or noisy downshifts from 3rd to 2nd or from 2nd to 1st when slowing down? The problem most likely has something to do with the software and not the A/T. This problem frequently follows a DTC P0122 (TP sensor circuit low voltage), a replacement of the throttle body, or both. To fix this problem, here's what you need to do:

1. Make sure the HDS is loaded with the latest software, then connect it to the 16P data link connector (DLC).

2. Turn the ignition switch to ON (II). Turn on the HDS.

3. Follow the prompts on the HDS, and update the PCM. If the PCM already has the latest software, reset it instead.

4. Do the idle learn procedure:

Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are off.

Start the engine, and let it warm up to normal operating temperature (cooling fans cycle twice).

Let the engine idle with the throttle closed for 10 minutes.

5. Test-drive the vehicle to make sure the A/T shifts properly and the noise is gone.