Door Unlock Sensor Check

Check Door Unlock Sensor Input Signal

Turn ignition off. Using DVOM, measure voltage (backprobe) between ground and terminals No. 36 (Yellow/Green wire) or No. 37 (Yellow 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 SPECIFICATIONS

Application (Terminal No.) & Condition		Voltage
LF Door (36)
Unlocked		Zero
Locked		About 5 Volts
RF Door (37)
Unlocked		Zero
Locked		About 5 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.