Inspection Procedure

READ VALUE OF HAND-HELD TESTER
1. Check the DATA LIST for proper function of the buckle switch front LH.
  Driver side J/B ECU:
  
  Fig 1: Item Description Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  
  ON is displayed when the seat belt is fastened.
  
  OFF is displayed when the seat belt is unfastened.
1. NG: Go to step 2
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
INSPECT BUCKLE SWITCH FRONT LH
1. Disconnect the B4 switch connector.
2. Measure the resistance.
  Standard:
Fig 2: Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Inspecting Buckle Switch Front LH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE BUCKLE SWITCH FRONT LH
2. OK: Go to next step.
CHECK WIRE HARNESS (BUCKLE SWITCH FRONT LH - DRIVER SIDE J/B ECU AND BODY GROUND)
1. Disconnect the B4 switch and D4 ECU connectors.
2. Measure the resistance of the wire harness side connectors.
  Standard:
Fig 4: Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Checking Wire Harness (Buckle Switch Front LH - Driver Side J/B ECU And Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )