Inspection Procedure

CHECK CONTINUITY OF COMMUNICATION LINE
1. Check the wire harness among the turn signal switch assy and multiplex tilt and telescopic ECU and multiplex network junction ECU.
  
  Fig 1: Identifying Connector Terminals - Turn Signal Switch Assy, Multiplex Tilt/Telescopic ECU & Multiplex Network Junction ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Disconnect the connectors of the turn signal switch assy, multiplex tilt and telescopic ECU and luggage room J/B.
  2. Check the continuity between terminal C9-10 (MPX2) of the turn signal switch assy vehicle side connector and terminal L24-2 (MPX+) of the luggage room J/B vehicle's side connector.
    Standard: Continuity
  3. Check the continuity between terminal C9-9 (MPX1) of the turn signal switch assy vehicle's side connector and terminal 6 (MPX2) of the multiplex tilt and telescopic ECU vehicle's side connector.
    Standard: Continuity
1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK: Go to next step
CHECK TURN SIGNAL SWITCH ASSY
1. Inspect the SW power source input.
  1. Disconnect the SW connector C9.
  2. Check the voltage between each terminal of the SW vehicle's side connector.
    
    Fig 2: Identifying Connector C9 Terminal B - Turn Signal Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard:
    
    Fig 3: Connector C9 Terminal B Voltage Reference Table - Turn Signal Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE FUSE OR WIRE HARNESS AND CONNECTOR
2. OK: Go to next step
CHECK TURN SIGNAL SWITCH ASSY
1. Inspect the SW body ground.
  1. Disconnect the SW connector C9.
  2. Check the continuity between terminal 8 (E) of the SW and the body ground.
    Standard: Continuity
    
    Fig 4: Identifying Connector C9 Terminal E - Turn Signal Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK: REPLACE TURN SIGNAL SWITCH ASSY