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Home >> Toyota >> 2003 >> Highlander Limited, FWD >> Repair and Diagnosis >> Electrical >> Gauges >> Combination Meter - Diagnostics >> Seat Belt Warning Lamp For Front Passenger's Seat Does Not Flash >> Inspection Procedure

Inspection Procedure

  1. CHECK PASSENGER SEAT BELT WARNING LIGHT 
    1. Remove the body ECU with connectors still connected.
    2. Using SST, connect the terminal PBKL (B11-4) and body ground.
      Fig 1: Identifying ECU Connector Terminals
      G02828500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check that the passenger seat belt warning light flashes.
    1. NG: CHECK AND REPLACE COMBINATION METER ASSEMBLY 
    2. OK: GO TO NEXT STEP 
  2. INSPECT FRONT SEAT INNER BELT ASSEMBLY RH 
    1. Disconnect the connector from seat belt inner belt RH.
    2. Check continuity between terminals 1 and 4 when buckle switch condition is as shown in PASSENGER BUCKLE SWITCH SPECIFICATIONS  table.

      OK: 

      PASSENGER BUCKLE SWITCH SPECIFICATIONS

      Condition Specified Condition
      ON (Seat Belt Unfastened) Continuity
      OFF (Seat Belt Fastened) No Continuity
      Fig 2: Identifying Passenger Front Seat Inner Belt Buckle Switch Connector Terminals
      G02828501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE FRONT SEAT INNER BELT ASSEMBLY RH 
    2. OK: GO TO NEXT STEP 
  3. INSPECT SEPARATE SEAT TYPE FRONT SEAT CUSHION PAD (OCCUPANT DETECTION SENSOR) 
    1. Disconnect the separate type front seat cushion pad.
    2. Check continuity separate type front seat cushion pad.
      Fig 3: Occupant Detection Sensor Reference Table
      G02828502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying Occupant Detection Sensor Connector Terminals
      G02828503Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE SEPARATE SEAT TYPE FRONT SEAT CUSHION PAD 
    2. OK: GO TO NEXT STEP 
  4. CHECK HARNESS AND CONNECTOR (BETWEEN BODY ECU AND BUCKLE SWITCH RH) 
    1. NG: CHECK AND REPLACE MULTIPLEX NETWORK BODY ECU 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
  5. CHECK THAT MALFUNCTION DISAPPEARS WHEN A KNOWN GOOD COMBINATION METER IS INSTALLED 
    1. Check that malfunction disappears when a known good combination meter is installed.
      1. Malfunction does not disappear, proceed to A.
      2. Malfunction disappears, proceed to B.
    1. A: CHECK AND REPLACE MULTIPLEX NETWORK BODY ECU 
    2. B: CHECK AND REPLACE AIR CONDITIONER AMPLIFIER ASSEMBLY 
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