Door Control Switch Circuit

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Door Control Switch Circuit
- Door Control Switch Circuit

DESCRIPTION

for Driver Side:

* When the lock side of the door control switch is pressed, continuity is established between terminal 2 and terminal 1 on the switch. When the unlock side of the switch is pressed, continuity is established between terminal 9 and terminal 1. Terminals L1 and UL1 on the main body ECU are connected to the door control switch, and door lock/unlock request signals (by door control switch operation) are input to the main body ECU. The main body ECU constantly applies voltage to terminal 2 of the door control switch via terminal L1. When the door control switch is operated to lock all doors, current flows from terminal L1 to terminal 2. The main body ECU determines that this is a door lock request signal input. The main body ECU also applies constant voltage to terminal 9 on the door control switch via terminal UL1. When the door control switch is operated to unlock the doors, current flows from terminal UL1 to terminal 9. The main body ECU determines that this is a door unlock request signal input.

for Passenger Side:

* When the lock side of the door control switch is pressed, continuity is established between terminal 4 and terminal 3 on the switch. When the unlock side of the switch is pressed, continuity is established between terminal 2 and terminal 3. Terminals L1 and UL1 on the main body ECU are connected to the door control switch, and door lock/unlock request signals (by door control switch operation) are input to the main body ECU. The main body ECU constantly applies voltage to terminal 4 on the door control switch via terminal L1. When the door control switch is operated to lock all doors, current flows from terminal L1 to terminal 4. The main body ECU determines that this is a door lock request signal input. The main body ECU also applies constant voltage to terminal 2 on the door control switch via terminal UL1. When the door control switch is operated to unlock the doors, current flows from terminal UL1 to terminal 2. The main body ECU determines that this is a door unlock request signal input.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (DOOR CONTROL SWITCH)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch 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

Main Body:

OK:

The display is as specified in the normal condition column.

Result

Result:

C -- INSPECT DOOR CONTROL SWITCH (FOR PASSENGER SIDE)

B -- INSPECT POWER WINDOW REGULATOR MASTER SWITCH (FOR DRIVER SIDE)

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

2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH (FOR DRIVER SIDE)

(a) Remove the power window master switch Removal.





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

Standard resistance:





(c) Reinstall the power window master switch Installation.

NG -- REPLACE POWER WINDOW REGULATOR MASTER SWITCH Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (DOOR LOCK SWITCH - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the J1 power window master switch connector.





(b) Disconnect the 4H main body ECU (instrument panel junction block) connector.

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

Standard resistance:





(d) Reconnect the power window master switch connector.

(e) Reconnect the main body ECU (instrument panel junction block) connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU

4. INSPECT DOOR CONTROL SWITCH (FOR PASSENGER SIDE)

(a) Remove the door control switch Removal.





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

Standard resistance:





(c) Reinstall the door control switch Installation.

NG -- REPLACE DOOR CONTROL SWITCH Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (DOOR LOCK SWITCH - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the I6 front door lock control switch RH connector.





(b) Disconnect the 4C and 4E main body ECU (instrument panel junction block) connector.

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

Standard resistance:





(d) Reconnect the front door lock control switch RH connector.

(e) Reconnect the main body ECU (instrument panel junction block) connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU