Powertrain Control Module (PCM) Reset Procedure/clearing Diagnostic Trouble Codes Acura MDX I

To clear codes using the Honda PGM Tester or the HDS, use the "CLEAR COMMAND". The PCM stores data and DTCs to correct the system even when there is no electrical power (such as the No. 10 BACK UP fuse removed or battery negative cable disconnected).

Honda PGM Tester and HDS has 3 kinds of clear commands

1. DTC Clear - This command erases all stored DTC codes and Freeze Data.
2. PCM Clear - This command erases all stored DTC codes, Freeze Data and all specific data to correct the system except CKP pattern.
3. CKP Pattern Clear - This command erases only CKP pattern data. This command is for the repair of a misfire or CKP sensor. If CKP pattern data is cleared from PCM, you must do the CKP pattern relearn procedure by test drive. See «CKP PATTERN LEARN PROCEDURE»(ref-178823-S34615825152005081100000) .