No Answer-Back

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

DESCRIPTION

In some cases, the wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function does not operate. In such cases, hazard warning light and wireless door lock buzzer signal outputs from the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly) may be malfunctioning.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Start troubleshooting after confirming that the customization status of the answer-back function has been switched on.
* Before performing the inspection, check that there are no problems related to the CAN communication system.
* Before replacing the certification ECU (smart key ECU assembly), refer to the smart key system (for Entry Function) Smart Key System (for Entry Function).

PROCEDURE

1. READ VALUE USING TECHSTREAM (DOOR LOCK POSITION SWITCH)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body





OK:

On tester screen, each item changes between UNLOCK and LOCK according to above chart.

NG -- Go to LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) Interior Lighting System
OK -- Continue to next step.

2. CHECK WIRELESS ANSWER-BACK OPERATION

(a) Check the wireless answer-back operation by operating wireless door lock control function.

Result





B -- PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)
A -- Continue to next step.

3. CHECK HAZARD WARNING LIGHT OPERATION

(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 (Proceed to Hazard Warning Lights do not Operate [Turn Signal Lights are Normal]) Exterior Lighting System
OK -- Continue to next step.

4. PERFORM ACTIVE TEST USING TECHSTREAM (HAZARD WARNING LIGHT)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

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

Main Body





OK:

The hazard warning lights can be turned on and off using the Techstream.

NG -- CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MAIN BODY ECU)

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

5. CHECK HARNESS AND CONNECTOR (TURN SIGNAL FLASHER - MAIN BODY ECU)

(a) Disconnect the C19 turn signal flasher assembly connector.

(b) Disconnect the C56 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

6. PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

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

Main Body





OK:

The wireless door lock buzzer can be turned on and off using the Techstream.

NG -- CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK AND BODY GROUND)
OK -- Continue to next step.

7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Temporarily replace the main body ECU (multiplex network body ECU) with a new or normally functioning one Removal.

NEXT -- Continue to next step.

8. CHECK WIRELESS DOOR LOCK BUZZER OPERATION

(a) Check that the wireless door lock buzzer sounds by operating the wireless door lock function.

OK:

Wireless door lock buzzer sounds.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (MAIN BODY ECU IS DEFECTIVE)

9. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK AND BODY GROUND)

(a) Disconnect the A25 wireless door lock buzzer connector.

(b) Remove the instrument panel junction block assembly Removal.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





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

10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- Continue to next step.

11. REPLACE WIRELESS DOOR LOCK BUZZER

(a) Temporarily replace the wireless door lock buzzer with a new or normally functioning one Removal.

NEXT -- Continue to next step.

12. CHECK WIRELESS DOOR LOCK BUZZER OPERATION

(a) Check that the wireless door lock buzzer sounds by operating the wireless door lock function.

OK:

Wireless door lock buzzer sounds.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

OK -- END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE)