Inspection Procedure

Check headlights operation.
CHECK:

Check that the headlights light up when the light control switch is turned to HEAD.
1. NG: Check headlight and taillight system (see LOCATION ).
2. OK: Go to Next Step.
Check harness and connector between TVIP ECU and light control switch.
PREPARATION:
1. Disconnect the T11 TVIP ECU connector.
2. Disconnect the C15 light control switch connector.
  
  Fig 1: Terminals Continuity Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK:

Check the continuity between the wire harness side connectors.

OK:

Fig 2: View Of T11 TVIP ECU & C15 Light Control Switch Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Repair or replace harness and connector.
2. OK: Go to Next Step.
Replace TVIP ECU.