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Home >> Lexus >> 2004 >> GX 470 >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Abs With EBD & BA & TRAC & VSC System - Diagnosis >> DTC C1380/64: Malfunction In Stop Light Operation Relay >> Inspection Procedure

Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR(STP2 INPUT CIRCUIT) 
    1. Check for open and short circuit in harness and connector of STP2 input circuit (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  2. INSPECT STOP LIGHT SWITCH ASSY 
    1. Check that the stop light lights up when brake pedal is depressed and turns OFF when the brake pedal is released.
    1. NG: REPAIR OR REPLACE STOP LIGHT SWITCH ASSY OR HARNESS AND CONNECTOR 
    2. OK: GO TO NEXT STEP. 
  3. CHECK STOP LIGHT OPERATION RELAY 
    1. Check continuity between each terminal of stop light operation relay.

      OK: 

      Fig 1: Terminal Table
      G01422171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage between terminal 1 and 2.
    3. Check continuity between terminal 3 and 5 of stop light operation relay.

      OK: 

      Terminal 3 and 5 Continuity

      Fig 2: Checking Stop Light Operation Relay Continuity
      G01422172Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: REPLACE STOP LIGHT OPERATION RELAY 
      2. OK: GO TO NEXT STEP. 
  4. CHECK HARNESS AND CONNECTOR(STPO OUTPUT CIRCUIT) 

    Check for open and short circuit in harness and connector of STPO output circuit (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

    1. NG: REPAIR OR REPLACE HARBESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP. 

    CHECK AND REPLACE SKID CONTROL ECU ASSY