Room Oscillator Circuit

DOOR LOCK: SMART KEY SYSTEM: Room Oscillator Circuit
- Room Oscillator Circuit

DESCRIPTION

The certification ECU activates the front and rear cabin oscillators. The power is supplied from the certification ECU to both the front and rear cabin oscillators. The front and rear cabin oscillator circuits have the same wiring. If the smart key system does not operate properly inside the vehicle, check the circuit for their oscillators.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (CERTIFICATION ECU - OUTPUT SIGNAL)

(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 / Active Test.

(e) Perform the Active Test according to the display on the tester.

Smart Key:





(f) Measure the frequency according to the value(s) in the table below.





OK:





NG -- REPLACE CERTIFICATION ECU
OK -- Continue to next step.

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

(a) Disconnect the D39 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 -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE