No Answer-Back

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System): No Answer-Back

No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning lights and/or wireless door lock buzzer answer-back function(s) does not operate. In such cases, the certification ECU's (smart key ECU assembly) hazard warning lights and wireless door lock buzzer signal outputs may be malfunctioning.
NOTE: Troubleshooting should be started after confirming that the customize status of the answer-back function has been switched ON.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION
(a) Check the wireless door lock control functions by operating the transmitter switch.
Result:






C -- GO TO FLOWCHART
B -- PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.
2. CHECK HAZARD WARNING LIGHT
(a) Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.
OK:
Hazard warning lights flash continuously.
NG -- GO TO LIGHTING SYSTEM
OK -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (TURN SIGNAL FLASHER)
(a) Select an Active Test, use Techstream to generate a control command, and then check that the hazard warning lights flash.

Smart Key (Certification ECU (Smart Key ECU Assembly))





OK:
Hazard warning lights are turned ON/OFF.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. REPLACE MAIN BODY ECU
(a) Replace the main body ECU.
NEXT -- Continue to next step.
5. CHECK HAZARD WARNING LIGHTS
(a) Check that the hazard warning lights flash continuously when the door control transmitter LOCK or UNLOCK switch is pressed.
OK:
Hazard warning lights flash continuously.
NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU)
OK -- REPLACE MAIN BODY ECU
6. PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
(a) Select the Active Test, use Techstream to generate a control command, and then check that the wireless buzzer operate normally.

Main Body





OK:
Wireless buzzer turns ON/OFF.
NG -- INSPECT WIRELESS DOOR LOCK BUZZER
OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU)
7. INSPECT WIRELESS DOOR LOCK BUZZER




(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NOTICE:
- The buzzer circuit is built into the certification ECU (smart key ECU assembly), not into the buzzer itself.
- When battery voltage is directly applied to the buzzer, the buzzer does not sound.

NG -- REPLACE WIRELESS DOOR LOCK BUZZER
OK -- Continue to next step.
8. CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER - CERTIFICATION ECU AND BODY GROUND)
(a) Disconnect the A13 buzzer connector.




(b) Disconnect the D40 certification ECU (smart key ECU assembly) connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU)