Room Oscillator does not Recognize Key

DOOR LOCK: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: Room Oscillator does not Recognize Key

Room Oscillator does not Recognize Key

DESCRIPTION

If the entry ignition function does not operate, place the key in the vehicle and check if the hybrid vehicle control system starts. If the hybrid vehicle control system starts (the ID code box outputs a start permission to the hybrid vehicle control system and the hybrid vehicle control system starts), it can be assumed that only the entry ignition system is malfunctioning.
The certification ECU uses the indoor electrical key antenna to send a request signal to the key when: 1) the driver's door is opened and closed, or 2) the power switch is turned from ON (ACC) to OFF or OFF to ON (IG). Then, the key transmits its ID code to the entry door control receiver. The ID code, which is then sent to the certification ECU, is verified by the certification ECU and the verification result is sent to the ID code box. Turning the power switch from ON (ACC) to OFF stops the hybrid vehicle control system.
The ID code box and the certification ECU communicate encryption codes to each other using the multiplex communication line. When the return code from the certification ECU matches the ID code in memory, the ID code box sends an hybrid vehicle control system start permission signal to the ECM. With the brake pedal depressed, pressing the power switch starts the hybrid vehicle control system. With the hybrid vehicle control system running, pressing the power switch stops the hybrid vehicle control system.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK AND UNLOCK OPERATION
(a) Check that the wireless door lock and unlock functions operate normally.
OK:
Wireless door lock functions operate normally.
NG -- GO TO WIRELESS DOOR LOCK CONTROL FUNCTION
OK -- Continue to next step.
2. CHECK OPERATION OF KEY
(a) After replacing the key with a normally functioning one, check that the wireless lock and unlock functions operate normally.
OK:
Wireless lock and unlock functions operate normally.
OK -- END (KEY IS DEFECTIVE)
NG -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (INDOOR ELECTRICAL KEY ANTENNA)
(a) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the antenna operates.

Certification ECU:





OK:
When key is brought close to indoor electrical key antenna, antenna is turned OFF and indicator on key illuminates.
OK -- REPLACE CERTIFICATION ECU
NG -- Continue to next step.
4. CHECK WIRE HARNESS (INDOOR ELECTRICAL KEY ANTENNA - CERTIFICATION ECU ASSEMBLY)





(a) Disconnect the U35, V32 and V33 antenna connectors.
(b) Disconnect the U28 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK INDOOR ELECTRICAL KEY ANTENNA
(a) Carry the key into the vehicle.
(b) Replace the indoor electrical key antenna with a new one.
(c) Depress the brake pedal and check that the power switch indicator illuminates in green.
OK:
Power switch indicator illuminates in green.
OK -- END (INDOOR ELECTRICAL KEY ANTENNA IS DEFECTIVE)
NG -- REPLACE CERTIFICATION ECU