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 1 (regular cab) or 2 (double cab) and terminal 7 (regular cab) or 1 (double cab) of the switch. When the unlock side of the switch is pressed, continuity is established between terminal 9 and terminal 7 (regular cab) or 1 (double cab). Terminals L1 and UL1 of 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 ECU. The main body ECU constantly applies voltage to terminal 1 (regular cab) or 2 (double cab) 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 1 (regular cab) or 2 (double cab). 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 of 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 of the switch. When the unlock side of the switch is pressed, continuity is established between terminal 2 and terminal 3. Terminals L1 and UL1 of 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 ECU. The main body ECU constantly applies voltage to terminal 4 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 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 of 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) Check the Data List to ensure proper functioning of the door control switch.

Main Body





OK:
The display is as specified in the normal condition column.

Result





C -- INSPECT DOOR CONTROL SWITCH
B -- INSPECT POWER WINDOW REGULATOR MASTER SWITCH
A -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH





(a) Remove the master switch (Removal).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPLACE POWER WINDOW REGULATOR MASTER SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (DOOR LOCK SWITCH - MAIN BODY ECU)





(a) Disconnect the N2 switch connector.
(b) Disconnect the DD 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
4. INSPECT DOOR CONTROL SWITCH





(a) Remove the door control switch (Removal).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPLACE DOOR CONTROL SWITCH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (FRONT DOOR CONTROL SWITCH RH - MAIN BODY ECU AND BODY GROUND)





(a) Disconnect the M5 switch connector.
(b) Disconnect the DD 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