Inspection Procedure

HINT

Front controller sends engine hood open/close signal to main body ECU RH through the multiplex communication

1. Clear the DTCs (See DTC CHECK / CLEAR )
2. Check for DTCs again

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Multiplex communication DTC is not output	OK
   Multiplex communication DTC is output	NG

NG: GO TO MULTIPLEX COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

OK: Go to next Step 

1. Connect the Techstream to the DLC3
2. Turn the engine switch on (IG).
3. Turn the Techstream on
4. Select the item below in the Data List and read the display on the Techstream

   Body No. 5 

   DIAGNOSTIC NOTE
   
   

   Tester Display	Measurement Item/Range	Test Detail	Diagnostic Note
   Hood Courtesy SW	Engine hood courtesy switch signal/ ON or OFF	ON Engine hood is OPEN OFF Engine hood is CLOSED	-

   OK: The indicator on the Techstream switches between ON and OFF in accordance with the engine hood courtesy switch status. 

NG: Go to step 3 

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

1. Remove the engine hood courtesy switch from the hood lock (See REMOVAL  )
2. Disconnect the multiplex network body ECU connector.
3. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   1-2	Free (OFF)	10 kΩ or higher
   1-2	Pushed (ON)	Below 1 Ω

Fig 1: Removing Engine Hood Courtesy Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HOOD LOCK ASSEMBLY  (See REMOVAL  )

OK: Go to next Step 

1. Disconnect the 2G multiplex network body ECU connector and B8 engine hood courtesy switch connector
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   2G-3 - B8-2	Always	Below 1 Ω
   2G-3 or B8-2 - Body ground	Always	10 kΩ or higher

Fig 2: Identifying 2G Multiplex Network Body ECU Connector And B8 Engine Hood Courtesy Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next Step 

1. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   B8-1 - Body ground	Always	Below 1 Ω

Fig 3: Identifying B8 Engine Hood Courtesy Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MULTIPLEX NETWORK BODY ECU