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

To prevent the key from being locked in the vehicle, the multiplex network body ECU prevents the doors from being locked by monitoring 2 switches: 1) the unlock warning switch, which turns ON when the key is inserted into the ignition key cylinder; and 2) the driver side courtesy light switch, which turns ON when the driver side door is opened.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK - BODY GROUND)

(a) Disconnect the 1K driver side J/B connector.





(b) Measure the resistance.

Standard:





(c) Reconnect the driver side J/B connector.

OK -- CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)
NG -- Continue to next step.

2. INSPECT UNLOCK WARNING SWITCH ASSEMBLY

(a) Remove the unlock warning switch.





(b) Measure the resistance.

Standard:





(c) Reinstall the unlock warning switch.

NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (SWITCH ASSEMBLY - DRIVER SIDE J/B ASSEMBLY AND BODY GROUND)

(a) Disconnect the U1 unlock warning switch connector.





(b) Disconnect the 1K driver side J/B connector.

(c) Measure the resistance of the wire harness side connectors.

Standard:





(d) Reconnect the unlock warning switch connector.

(e) Reconnect the driver side J/B connector.

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

4. CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)

(a) Move the room light switch to the DOOR position and open the driver side door. Check that the room light turns ON.

OK:

Room light turns ON.

OK -- REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY
NG -- Continue to next step.

5. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (DRIVER SIDE)

(a) Remove the front door courtesy light switch assembly.





(b) Measure the resistance of the switch.

Standard:





(c) Reinstall the front door courtesy light switch assembly.

NG -- REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY
OK -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (SWITCH ASSEMBLY (DRIVER SIDE) - DRIVER SIDE J/B ASSEMBLY)

(a) Disconnect the D11 front door courtesy light switch connector.





(b) Disconnect the 1F driver side J/B connector.

(c) Measure the resistance.

Standard:





(d) Reconnect the front door courtesy light switch connector.

(e) Reconnect the driver side J/B connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE DRIVER SIDE JUNCTION BLOCK