Inspection Procedure

INSPECT DOOR COURTESY LAMP SWITCH ASSY
1. Check that the open door warning light comes on when each door and back door is opened and goes off when all the doors are closed.
1. NG: CHECK DOOR COURTESY SWITCH CIRCUIT (See HOW TO PROCEED WITH TROUBLESHOOTING )
2. OK: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - MULTIPLEX NETWORK BODY ECU)
1. Check for open and short circuit in the harness and the connector between the suspension control ECU and the multiplex network body ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
INSPECT MULTIPLEX NETWORK BODY ECU (ACTIVITY OUTPUT)
1. Remove the multiplex network body ECU with connectors being connected.
2. Measure voltage between terminal B4-20 (ACTIVITY) and body ground of the multiplex network body ECU when door is opened and closed.
  Standard:
  
  Fig 1: Voltage Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Measuring Voltage Between Terminal B4-20 (ACTIVITY) And Body Ground Of Multiplex Network Body ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
2. OK: GO TO NEXT STEP.
  CHECK AND REPLACE SUSPENSION CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )