Inspection Procedure

1. Connect the Techstream to the DLC3
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Turn the clearance sonar main switch ON.
5. Select the Active Test, use the Techstream to generate a control command, and then check that the buzzer operates.

   Intuitive P/A 

   REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Rear Buzzer	Rear buzzer (Clearance warning buzzer)	STOP or OPERATE	-

   OK: The clearance warning buzzer sounds. 

NG: Go to step 2 

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

1. Remove the RH-IG fuse from the cowl side junction block RH
2. Measure the resistance of the RH-IG fuse

   Standard Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Item	Condition	Specified Condition
   RH-IG fuse	Always	Below 1 Ω

NG: REPLACE FUSE (RH-IG) 

OK: Go to next step 

1. Disconnect the clearance warning buzzer connector.
2. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   J39-1 - Body ground	Engine switch on (IG)	11 to 14 V

Fig 1: Identifying J39 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the clearance warning ECU connector.
   Fig 2: Identifying Q37 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   Q37-9 (CBZ) - J39-1	Always	Below 1 Ω
   Q37-9 (CBZ) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying J39 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Apply battery voltage and check operation of the clearance warning buzzer, as shown in the table. OK

   OK 

   MEASUREMENT CONDITION
   
   

   Measurement Condition	Specified Condition
   Battery positive (+) → J39-1 Battery negative (-) → J39-2	Operating sound occurs

   HINT

   The clearance warning buzzer does not sound without battery voltage applied because the buzzer is a separately-excited type.

Fig 4: Identifying J39 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE CLEARANCE WARNING BUZZER  (See REMOVAL  )

OK: REPLACE CLEARANCE WARNING ECU  (See REMOVAL  )