Touch Sensor Circuit

DOOR LOCK: SMART KEY SYSTEM: Touch Sensor Circuit
- Touch Sensor Circuit

DESCRIPTION

This circuit receives the signal indicating whether or not a touch sensor signal is detected.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the tester on.

(d) Enter the following menus: Body Electrical / Smart Key / Data List.

(e) Read the Data List according to the display on the tester.

Smart Key:





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 -- Continue to next step.

2. CHECK WIRE HARNESS (CERTIFICATION ECU - DOOR OSCILLATOR)

(a) Disconnect the D39 and D40 ECU connector.





(b) Disconnect the oscillator connectors.





(c) Measure the resistance between the oscillator and the certification ECU to check for an open circuit in the wire harness.

Resistance:

Below 1 Ohms

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

Resistance:

10 kOhms or higher

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT CERTIFICATION ECU

(a) Reconnect the ECU and the oscillator connectors.





(b) Connect Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.

Voltage:





OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.

4. REPLACE DOOR OSCILLATOR (CHECK OPERATION OF DOOR OSCILLATOR)

(a) Replace the door oscillator.

(b) 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)