Inspection Procedure

1. Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.

   OK: The brake warning light operates as specified above. 

NG: GO TO LIGHTING SYSTEM  (See PROBLEM SYMPTOMS TABLE )

OK: Go to next step 

1. Disconnect the L59 display connector.
2. Disconnect the L12 ECU connector.
3. Measure the resistance according to the value(s) in the table below

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L59-23 (PKB) - L12-13 (PKBO)	Always	Below 1 Ω
   L59-23 (PKB) - Body ground	Always	10 kΩ or higher

   Fig 1: Checking Harness And Connector (Display And Navigation Assembly - Main Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )