Inspection Procedure

INSPECT FUSE (ECU-B)
1. Inspect the ECU-B fuse (See ELECTRICAL COMPONENT LOCATOR ).
1. NG: REPLACE FUSE
2. OK: Go to next step.
READ VALUE OF HAND-HELD TESTER
1. Using the hand-held tester, check that the unlock warning switch signal is output when the switch is operated.
  Standard (Multiplex network body ECU):
  
  Fig 1: Hand Held Tester Valve Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Go to step 5
2. NG: Go to next step.
INSPECT UNLOCK WARNING SWITCH ASSY
1. Remove the unlock warning switch.
2. Inspect the resistance of the switch.
  Standard:
  
  Fig 3: Terminal Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE UNLOCK WARNING SWITCH ASSY
2. OK: Go to next step.
CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY - INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU))
1. Disconnect the K4 switch and B6 body ECU connectors.
2. Check the resistance between the wire harness side connectors.
  Standard (Check for open circuit):
  
  Fig 5: Terminal Specified Condition
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
READ VALUE OF HAND-HELD TESTER
1. Using the hand-held tester, check that the driver side door courtesy lamp switch signal is output when the switch is operated.
  Standard (Multiplex network body ECU):
  
  Fig 6: Hand Held Tester Value Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
2. NG: Go to next step.
INSPECT FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIVER SIDE)

Fig 7: Identifying Free & Pushed Position Of Courtesy Lamp Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the courtesy lamp switch.
2. Inspect the resistance of the switch.
  Standard:
  
  Fig 8: Terminal Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSY
2. OK: Go to next step.

CHECK WIRE HARNESS (FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIVER SIDE) - INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU))

Disconnect the D7 switch and B9 body ECU connectors.

Fig 9: Identifying D7 & B9 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance between the wire harness side connectors.

Standard (Check for open circuit):

TERMINAL SPECIFIED CONDITION

Terminal No.	Specified Condition
D7-1 - B9-14 (DCTY)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)