LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2000 >> Seville STS >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Remote Keyless Entry Systems >> Diagnostic Tests >> Diagnostic System Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic System Check

  1. Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, see SCAN TOOL DOES NOT POWER UP in BODY CONTROL MODULES - SEVILLE article.
  2. Turn ignition on, engine off. Try to establish scan tool communication with Remote Function Actuator (RFA) module on Class 2 serial data circuit. If communication with RFA module is established, go to next step. If communication with RFA module is not established, see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in BODY CONTROL MODULES - SEVILLE article.
  3. Select display DTC function for RFA module. Record all displayed DTCs and status of displayed DTCs. If DTCs are displayed, go to next step. If no DTCs are displayed, see SYMPTOM TESTS  .
  4. If scan tool does not display any DTCs beginning with "U", go to next step. If scan tool displays DTCs beginning with "U", see SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in BODY CONTROL MODULES - SEVILLE article.
  5. If scan tool displays DTC B1000, B1004 or B1327, see BODY CONTROL MODULES - SEVILLE article.
scientia non olet · About LEMON Manuals