Door Unlock Sensor Check
- Check Door Unlock Sensor Input Signal
Turn ignition off. Using DVOM, measure voltage (backprobe) between ground and terminals No. 37 (Gray/Yellow wire), No. 40 (Purple wire), No. 46 (Red/Yellow wire) or No. 48 (Red/Blue wire) at Smart Entrance Control Unit (SECU) harness connector. See Figure . See WIRING DIAGRAMS . Ensure voltage is as specified. See DOOR UNLOCK SENSOR VOLTAGE SPECIFICATIONS table. If voltage is as specified, door unlock sensor is okay. If voltage is not as specified, go to next step.DOOR UNLOCK SENSOR VOLTAGE SPECIFICATIONSApplication (Terminal No. ) & Condition Voltage LF Door (46) Unlocked Zero Locked About 12 Volts RF Door (37) Unlocked Zero Locked About 12 Volts Sliding Doors (40) Unlocked Zero Locked About 12 Volts Back Door (48) Unlocked Zero Locked About 12 Volts - Check Door Unlock Sensor
Disconnect door unlock sensor harness connectors. Using DVOM, check for continuity between door unlock sensor terminals. See WIRING DIAGRAMS . Continuity should be present only when sensor is in UNLOCKED position. If continuity is not as specified, replace door unlock sensor. If continuity is as specified, check for open or short in circuit between appropriate door unlock sensor and SECU. Check door unlock sensor ground circuit. Repair as necessary.