Diesel Data: Automotive Repair

5. Door Lock Actuator Switch Input Circuit





OPERATION DESCRIPTION
When a door s locked by the lock knob or the key, the door lock actuator switch is switched OFF, and HIGH-level signals are sent to the electronic control unit.

These signal activate the timer circuit of the electronic control unit, thereby causing the activation circuit to function, thus activating the door lock actuator of all doors.





ELECTRONIC CONTROL UNIT TERMINAL VOLTAGE
Check connection status of the electronic control unit connector.





CHECKING THE DOOR LOCK ACTUATOR SWITCH CIRCUIT
Disconnect the connector of the electronic control unit and check at the wiring harness side.


NOTE: The "ECU" (electronic control unit) indicates the ETACS control unit.