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

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

1. Disconnect the P33 ECU connector.

2. Disconnect the oscillator connectors.

Standard resistance:

Tester Connection (Symbols)	Condition	Specified Condition
P33-12 (CG5B) - P15-3 (CLGB)	Always	Below 1 Ω
P33-11 (CLG5) - P15-1 (CLG3)	Always	Below 1 Ω
P33-14 (CG6B) - Q30-3 (CLGB)	Always	Below 1 Ω
P33-13 (CLG6) - Q30-1 (CLG4)	Always	Below 1 Ω
P33-12 (CG5B) - Body ground	Always	10 kΩ or higher
P33-11 (CLG5) - Body ground	Always	10 kΩ or higher
P33-14 (CG6B) - Body ground	Always	10 kΩ or higher
P33-13 (CLG6) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. CHECK AND REPLACE ELECTRICAL KEY OSCILLATOR

1. Replace the electrical key oscillator.

2. Check that the entry LOCK / UNLOCK function operates normally.

   OK:

   Entry LOCK / UNLOCK function operates normally.
   

OK	END (ELECTRICAL KEY OSCILLATOR IS DEFECTIVE)

NG

3. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (CERTIFICATION ECU OUTPUT SIGNAL)

1. Reconnect the oscillator and the ECU connectors.

2. Connect the intelligent tester to the DLC3.

3. Turn the engine switch on (IG).

4. Following the display on the tester, select the "ACTIVE TEST".

   SMART KEY (Certification ECU): 

   Item	Vehicle Condition/Test Details
   Fr Transmitter	Electrical key Oscillator (console) ON/OFF
   Rr Transmitter	Electrical key Oscillator (rear seat) ON/OFF

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

   Standard:

   Tester Connection (Symbols)	Condition	Specified Condition
   P33-12 (CG5B) - P33-11 (CLG5)	During ACTIVE TEST	Frequency is generated (higher than 0 Hz)
   P33-14 (CG6B) - P33-13 (CLG6)	During ACTIVE TEST	Frequency is generated (higher than 0 Hz)

NG	REPLACE CERTIFICATION ECU

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE