Touch Sensor Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester on.
4. Enter the following menus: Body Electrical / Smart Key / Data List.
5. Read the Data List according to the display on the tester.
   SMART KEY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D-Door Touch Sensor	Status of touch sensor front LH / ON or OFF	ON: Touch sensor is touched OFF: Touch sensor is not touched	-
   P-Door Touch Sensor	Status of touch sensor front RH / ON or OFF	ON: Touch sensor is touched OFF: Touch sensor is not touched	-
   Dr-Door Touch Sensor	Status of touch sensor rear LH / ON or OFF	ON: Touch sensor is touched OFF: Touch sensor does not touched	-
   Pr DoorTouch Sensor	Status of touch sensor rear RH / ON or OFF	ON: Touch sensor is touched OFF: Touch sensor does not touched	-

   OK

   On the tester screen, each item changes between ON and OFF according to the chart above.

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

NG: Go to next step 

1. Disconnect the D39 and D40 ECU connector.
   Fig 1: View Of Disconnected D39 And D40 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the oscillator connectors.
   Fig 2: Identifying Door Oscillator Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.

   Resistance

   Below 1 Ω

4. Measure the resistance between the oscillator and the certification ECU to check for an short circuit in the wire harness.

   Resistance

   10 kΩ or higher

   HINT: 

   Refer to the appropriate wiring diagram for connection of each terminal.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the ECU and the oscillator connectors.
   Fig 3: Identifying Certification ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Voltage

   Tester Connection	Condition	Specified Condition
   SEL1 (D39-5) - Body ground	Move the key more than 5 m (16.4 ft) away from the front door LH → Bring it to the outside handle	10 to 14 V → Below 1 V
   SEL2 (D39-6) - Body ground	Move the key more than 5 m (16.4 ft) away from the front door RH → Bring it to the outside handle	10 to 14 V → Below 1 V
   SEL3 (D40-1) - Body ground	Move the key more than 5 m (16.4 ft) away from the rear door LH → Bring it to the outside handle	10 to 14 V → Below 1 V
   SEL4 (D40-2) - Body ground	Move the key more than 5 m (16.4 ft) away from the rear door RH → Bring it to the outside handle	10 to 14 V → Below 1 V
   SEN1 (D39-22) - Body ground	Front door LH outside handle is not held → Front door LH outside handle is held	10 to 14 V → Below 1 V
   SEN2 (D39-23) - Body ground	Front door RH outside handle is not held → Front door RH outside handle is held	10 to 14 V → Below 1 V
   SEN4 (D40-27) - Body ground	Rear door LH outside handle is not held → Rear door LH outside handle is held	10 to 14 V → Below 1 V
   SEN3 (D40-28) - Body ground	Rear door RH outside handle is not held → Rear door RH outside handle is held	10 to 14 V → Below 1 V

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

NG: Go to next step 

1. Replace the door oscillator.
2. Check that the entry UNLOCK function operates normally.

   OK

   Entry UNLOCK function operates normally.

NG → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE 

OK → END (DOOR OSCILLATOR IS DEFECTIVE)