LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2005 >> MDX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Climate Control System) >> DTC Troubleshooting >> DTC B1202: Climate Control Unit Internal Error
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B1202: Climate Control Unit Internal Error

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Check the battery condition (see BATTERY TEST ) and the charging system (see CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING ).
  1. Clear the DTC with the HDS.
  2. Turn the ignition switch to LOCK (0), and then ON (II).
  3. Wait for 6 seconds or more.
  4. Do the self-diagnostic with the HDS (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS  ).
  5. Check for DTCs.

    Is DTC B1202 indicated? 

    YES  - The climate control unit is faulty, replace the climate control unit.

    NO  - Intermittent failure, the climate control unit is OK at this time.