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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Body Control Systems) >> System Tests >> Test No. 47: Luggage Compartment Door Opener Function Does Not Operate Using Wireless Door Lock Control System
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Test No. 47: Luggage Compartment Door Opener Function Does Not Operate Using Wireless Door Lock Control System

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Wireless door lock control system may also be referred to as remote keyless entry system.
  1. Check luggage compartment door (trunk) opener motor. See LUGGAGE COMPARTMENT DOOR LOCK MOTOR under COMPONENT TESTS under POWER TRUNK LID - AVALON article under DOOR LOCKS & ANTI-THEFT SYSTEMS in ACCESSORIES & EQUIPMENT. If luggage compartment door opener motor is okay, go to next step. If luggage compartment door opener motor is defective, replace luggage compartment door opener motor. After repairs, perform confirmation test. See CONFIRMATION TEST .
  2. Turn ignition off. Disconnect 25-pin body control ECU electrical harness connector B4 and single-pin luggage compartment door opener motor electrical harness connector. Check Blue wire between 25-pin body control ECU electrical harness connector B4 terminal No. 25 and single-pin luggage compartment door opener motor electrical harness connector. See Figure. See POWER DOOR LOCKS in SYSTEM WIRING DIAGRAMS article. If wire, harnesses and connectors are okay, go to next step. If wire, harnesses and connectors are defective, repair as necessary. After repairs, perform confirmation test. See CONFIRMATION TEST .
  3. Check body control ECU ground circuits. See BODY COMPUTER in SYSTEM WIRING DIAGRAMS article. If ground circuits are faulty, repair and retest system. If ground circuits are okay, substitute original body control ECU with a known-good unit and recheck system operation. If system operates properly, original body control ECU was defective. If system still does not operate properly, perform body control ECU pin voltage check. See BODY CONTROL ELECTRONIC CONTROL UNIT  under PIN VOLTAGE TESTS. Check wiring harness and electrical connectors for an intermittent problem. Repair wiring harnesses or connectors as necessary. If voltage values, harnesses and connectors are okay, replace body control ECU. After repairs, perform confirmation test. See CONFIRMATION TEST .
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