Back Door Entry Lock Function Does Not Operate

DOOR LOCK: SMART KEY SYSTEM: Back Door Entry Lock Function does not Operate
- Back Door Entry Lock Function does not Operate

DESCRIPTION

When the lock switch built into the back door outside handle is turned on, a lock switch ON signal is transmitted to the certification ECU, and a request signal is then transmitted to both the indoor electrical key oscillator and door electrical key oscillator by the certification ECU. Upon receipt of the request signal, the electrical key transmitter transmits an ID code to the certification ECU. When the certification ECU recognizes that the key is not in the cabin and is outside the vehicle, a door lock signal is transmitted to the main body ECU, causing all the doors to be locked.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and turn the Techstream ON.

(c) By following the Techstream screen display, check whether any DTCs are output.

OK:

No DTC output.

Result





B -- Go to DIAGNOSTIC TROUBLE CODE CHART Smart Key System

C -- Go to DIAGNOSTIC TROUBLE CODE CHART Smart Key System
A -- Continue to next step.

2. CHECK MANUAL DOOR UNLOCK OPERATION

(a) Check that all the doors unlock when the door control switch (for manual operation) is turned to LOCK and UNLOCK.

OK:

All doors can be lock and unlocked with door control switch.

NG -- Go to POWER DOOR LOCK CONTROL SYSTEM Operation Check
OK -- Continue to next step.

3. CHECK WIRELESS DOOR LOCK CONTROL OPERATION

(a) Check that the wireless door lock and unlock functions operate normally Operation Check.

OK:

Wireless door lock and unlock functions operate normally.

NG -- Go to WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System) Operation Check
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (LOCK SWITCH)

(a) Check the Data List for proper functioning of the door lock switch.

Smart Key





OK:

On Techstream screen, item changes between ON and OFF according to above chart.

NG -- INSPECT BACK DOOR OUTSIDE HANDLE
OK -- Continue to next step.

5. CHECK ECU AGGREGATION BOX (OPERATION)

(a) Temporarily replace the ECU aggregation box (certification ECU) with a new or normally functioning one Removal.

(b) Check that the entry lock and unlock functions operate normally Operation Check.

OK:

Entry lock and unlock functions operate normally.

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

OK -- END (CERTIFICATION ECU IS DEFECTIVE)

6. INSPECT BACK DOOR OUTSIDE HANDLE





(a) Disconnect the back door outside handle connector.

(b) Measure the resistance between the terminal when the lock switch is operated.

Standard resistance:





NG -- REPLACE BACK DOOR OUTSIDE HANDLE Removal

OK -- REPAIR OR REPLACE HARNESS AND CONNECTOR