LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2000 >> Impala LS >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Remote Keyless Entry Systems >> Diagnostic Tests >> DTC B1003: Programming Mode Active Message Not Received >> Diagnostic Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedure

  1. If diagnostic system check was performed, go to next step. If diagnostic system check was not performed, see DIAGNOSTIC SYSTEM CHECK  .
  2. Turn ignition off. Disconnect RCDLR. Connect a test light between RCDLR connector terminal No. 2 and ground. See Fig 1 . Turn ignition on, engine off. If test light is on, go to next step. If test light is off, go to step  4 .
  3. Check Light Green wire between RCDLR connector terminal No. 2 and BCM connector C1 terminal A11 for short to power. See WIRING DIAGRAMS  . If problem was found, repair as necessary, and go to step  6 . If problem was not found, go to step  5 .
  4. Check RCDLR connector for poor connections. If connector is okay, replace RCDLR. See REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR)  under REMOVAL & INSTALLATION. Reprogram transmitters. See TRANSMITTER PROGRAMMING  under PROGRAMMING. Go to step  6 .
  5. Check BCM connectors for poor connections. If connectors are okay, replace BCM. See appropriate BODY CONTROL MODULES article. Go to next step.
  6. Using scan tool, clear DTCs. Operate system to verify repair.
Fig 1: Identifying Remote Control Door Lock Receiver Connector Terminals
G00013381Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals