Inspection Procedure

HINT:

• It is possible to set the hazard warning light to OFF so that it does not blink for the answer back operation function.

  Confirm that the hazard warning light is not set to OFF and the hazard warning light is operating normally before performing the following inspections.

• Start the inspection from step 1 when using the Techstream and start from step  2 when not using the Techstream.

1. PERFORM ACTIVE TEST BY TECHSTREAM (HAZARD WARNING LIGHT) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch on (IG) and turn the Techstream main switch on.
   3. Select "ACTIVE TEST" mode on the Techstream.

      BODY: 

      ACTIVE TEST DETAIL
      
      

      Item	Vehicle Condition/Test Details	Diagnostic Note
      HAZARD	Turns turn signal flasher (relay) assembly ON/ OFF	Observe headlight and rear combination light

   4. Check that the Techstream can operate the hazard warning lights in the headlight and rear combination light units.

      OK: 

      The hazard warning lights turn on and off in accordance with Techstream operation. 

   NG: Go to step 2 

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

2. INSPECT MULTIPLEX NETWORK BODY ECU (HAZ TERMINAL) 
   1. Measure the voltage according to the value(s) in the table below.

      Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      D7-2 (HAZ) - Body ground	Transmitter switch not pressed	Below 1 V
      D7-2 (HAZ) - Body ground	Any transmitter switch pressed	10 to 14 V ((1))
      (1) When operating the answer back function.

   NG: Go to step 3 

   Fig 1: Identifying Multiplex Network Body ECU Connector (HAZ Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

3. CHECK HARNESS AND CONNECTOR (BETWEEN MULTIPLEX NETWORK BODY ECU TURN SIGNAL FLASHER) 
   1. Turn the ignition switch off.
   2. Disconnect the multiplex network body ECU (D7) connector and turn signal flasher assembly connector.
   3. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      D7-2 (HAZ) - D19-8 (HAZ)	Always	Below 1 Ω
      D7-2 (HAZ) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 2: Disconnecting Multiplex Network Body ECU (D7) Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK : REPLACE TURN SIGNAL FLASHER ASSEMBLY