Key Lock-In Prevention Function Does Not Work Properly

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Key Lock-in Prevention Function does not Work Properly

Key Lock-in Prevention Function does not Work Properly

DESCRIPTION

When the key is in the ignition key cylinder or the door courtesy light ON signal is output to the main body ECU, performing the door lock operation with the lock switch does not lock the doors.
HINT: Since the key reminder warning system has functions that use CAN communication, firstly confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with How to Proceed with Troubleshooting. Then, conduct the following troubleshooting procedure.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect a Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on tester, read on the "Data List".
Main Body:






OK:
The display is as specified in the normal condition.
NG -- INSPECT FRONT DOOR COURTESY SWITCH ASSEMBLY (DRIVER SIDE)
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM
(a) Connect a Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on tester, read on the "Data List".
Main Body:






OK:
The display is as specified in the normal condition.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
3. INSPECT UNLOCK WARNING SWITCH ASSEMBLY




(a) Remove the unlock warning switch assembly.
(b) Measure the resistance.
Standard resistance:






NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU)




(a) Disconnect the D19 unlock warning switch connector.
(b) Disconnect the 4D main body ECU connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the unlock warning switch connector.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
5. INSPECT FRONT DOOR COURTESY SWITCH ASSEMBLY (DRIVER SIDE)




(a) Remove the door courtesy switch.
(b) Measure the resistance.
Standard resistance:





(c) Reinstall the courtesy switch.
NG -- REPLACE FRONT DOOR COURTESY SWITCH ASSEMBLY (DRIVER SIDE)
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY SWITCH - MAIN BODY ECU)




(a) Disconnect the J2 door courtesy switch connector.
(b) Disconnect the 4A main body ECU connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the door courtesy switch connector.
(e) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU