Driver Side Door Key Lock and Unlock Switch Circuit

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Driver Side Door Key Lock and Unlock Switch Circuit
- Driver Side Door Key Lock and Unlock Switch Circuit

DESCRIPTION

The driver's door key lock and unlock switch is built into the driver's door lock assembly.

When the driver's door key cylinder is turned to lock all the doors by key, there is continuity between terminals L and E of the key lock and unlock switch. When the cylinder is turned to unlock the door(s), there is continuity between terminals UL and E.

Terminals L2 and UL3 of the main body ECU are connected to the door lock assembly, and door lock/unlock request signals (by key) are input to the main body ECU.

The main body ECU constantly applies voltage to terminal L of the driver's door lock assembly via terminal L2. When the driver's door key cylinder is turned to lock all the doors by key, current flows from terminal L2 to terminal L.

The main body ECU also applies constant voltage to terminal UL of the door lock assembly via terminal UL3. When the door key cylinder is turned in the direction to unlock the door(s) by key, current flows from terminal UL3 to terminal UL.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

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

(c) Turn the tester on.

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

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

Main Body:





OK:

The display is as specified in the normal condition column.

NG -- INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR KEY LOCK AND UNLOCK SWITCH)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR KEY LOCK AND UNLOCK SWITCH)

(a) Remove the front door lock assembly LH.





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

Standard resistance:





NG -- REPLACE FRONT DOOR LOCK ASSEMBLY
OK -- Continue to next step.

3. CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the front door lock assembly LH connector.





(b) Disconnect the main 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