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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls - Self-Diagnostics - 4.3L) >> Diagnostic Trouble Code Identification >> DTC U1064: Loss Of BCM &/Or VTD Communication >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Install scan tool. Turn ignition on, engine off. Attempt to establish communication with BCM. If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, check Light Green, Purple, and Yellow wires between BCM and VCM for an open circuit, short to ground, short to voltage, or loose or damaged terminals. Repair wiring as necessary.
  3. Check class II serial data circuits at VCM connector C4 terminals No. 11 (Dark Green wire) and No. 14 (Yellow wire) for an intermittent open circuit, short to ground, short to voltage, or loose or damaged terminals. Check for loose or damaged terminals at Data Link Connector (DLC), VCM or BCM. Repair as necessary. If a problem was not found, go next step.
  4. Ensure ignition is off. Reconnect all electrical connectors. Clear DTCs. Turn ignition off for 15 seconds. Turn ignition on, engine off. If DTC does not reset, problem is intermittent. If DTC P1626 resets, replace VCM. Perform appropriate relearn procedures. See PASSWORD LEARN PROCEDURE in ANTI-THEFT SYSTEMS - HOMBRE article in ACCESSORIES & EQUIPMENT. Reprogram using a Tech 2 or other OBD-II compatible scan tool.
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