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Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Multiplex Control Systems) >> Diagnostic Tests >> DTC B1211/11: Driver Door Ecu Communication Stopped >> Diagnostic Procedure
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Diagnostic Procedure

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.
  1. Turn ignition on. Operate driver door power window switch AUTO UP function by pulling switch completely up and releasing it. If AUTO UP function does work, go to next step. If AUTO UP function does not work, diagnose driver door ECU and retest system. See DRIVER DOOR CONTROL SYSTEM under TROUBLE SHOOTING under BODY CONTROL SYSTEMS - AVALON article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.
  2. Turn ignition off. Disconnect driver door ECU 25-pin electrical harness connector D19 and body control ECU 25-pin harness connector B5. See Figure. Using DVOM, check continuity of Red/Yellow wire between driver door ECU 25-pin electrical harness connector D19 terminal No. 20 and body control ECU 25-pin electrical harness connector B5 terminal No. 9. If continuity exists, diagnose driver door ECU and retest system. See DRIVER DOOR CONTROL SYSTEM under TROUBLE SHOOTING under BODY CONTROL SYSTEMS - AVALON article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT. If continuity does not exist, repair open circuit in Red/Yellow wire between body control ECU and driver door ECU and retest system. See COMPUTER DATA LINES in SYSTEM WIRING DIAGRAMS article.
  3. After repairs have been made, perform confirmation test. See CONFIRMATION TEST  under SELF-DIAGNOSTIC SYSTEM.
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