Room Oscillator Circuit

DOOR LOCK: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: 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 access system with push-button start does not operate properly inside the vehicle, check the circuit for their oscillators.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ELECTRICAL KEY OSCILLATOR)

(a) Disconnect the P33 ECU connector.





(b) Disconnect the oscillator connectors.

Standard resistance:





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

2. CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR

(a) Replace the electrical key oscillator.

(b) Check that the entry LOCK/UNLOCK function operates normally.

OK:

Entry LOCK/UNLOCK function operates normally.

OK -- END (ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)
NG -- Continue to next step.

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

(a) Reconnect the oscillator and the ECU connectors.





(b) Connect the Techstream to the DLC3.

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

(d) Following the display on the tester, select the "Active Test".

Smart Key (Certification ECU):





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

Standard:





NG -- REPLACE CERTIFICATION ECU

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