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Remote Keyless Entry Diagnostic System Check

  1. Connect scan tool to DLC. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST B: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS in BODY CONTROL MODULES - CATERA article.
  2. Turn ignition on with engine off. Attempt to communicate with BCM. If scan tool communicates with BCM, go to next step. If scan tool does not communicate with BCM, go to TEST A: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CATERA article.
  3. Select BCM and retrieve DTCs. If any DTCs exist, go to next step. If no DTCs exist, diagnose by symptom. See SYSTEM TESTS  .
  4. If any communication DTCs (DTCs that begin with a "U") exist, go to TEST A: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - CATERA article. If no communication DTCs exist, go to next step.
  5. If BCM DTCs B1000, B1004, B1007 or B1009 exists, see BODY CONTROL MODULES - CATERA article for description and diagnosis. If BCM DTCs B1000, B1004, B1007 or B1009 do not exist, go to next step.
  6. If BCM DTCs B1327 or B1328 exists, repair charging system as necessary. See GENERATORS & REGULATORS - CATERA article in STARTING & CHARGING. If scan tool does not display DTCs B1327 or B1328, go to next step.
  7. If BCM DTCs B2556 or B2560 are set, see RKE DIAGNOSTIC TROUBLE CODES  table. If BCM DTCs B2556 or B2560 are not set, diagnose by symptom. Go to SYSTEM TESTS  .
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