Front Door Lock Assembly LH (Door Unlock Sensor) Check

CHECK UNLOCK SENSOR POWER SUPPLY

Check voltage between Intelligent Key unit connector terminal 28 and ground.

CONNECTOR TERMINAL VOLTAGE SPECIFICATION

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M42	28	Ground	Driver side door lock is locked	5
M42	28	Ground	Driver side door lock is unlocked	0

OK or NG

OK: front door lock assembly LH (door unlock sensor) is OK.

NG: GO TO 2.

Fig 1: Checking Voltage Between Intelligent Key Unit Connector Terminal 28 And Ground

CHECK UNLOCK SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door lock assembly LH (door unlock sensor) connector.
3. Check continuity between Intelligent Key unit harness connector M42 (A) terminal 28 and front door lock assembly LH (door unlock sensor) harness connector D9 (B) terminal 3.
  28 - 3 : Continuity should exist.
  
  Fig 2: Checking Continuity Between Intelligent Key Unit Harness Connector M42 Terminal 28 And Ground
4. Check continuity between Intelligent Key unit harness connector M42 (A) terminal 28 and ground.
  28 - Ground : Continuity should not exist.
OK or NG

OK: GO TO 3.

NG: Repair or replace harness between Intelligent Key unit and front door lock assembly LH (door unlock sensor).

Fig 3: Checking Unlock Sensor Ground Circuit
CHECK UNLOCK SENSOR GROUND CIRCUIT
Check continuity between front door lock assembly LH (door unlock sensor) harness connector D9 terminal 4 and ground.

4 - Ground : Continuity should exist.

OK or NG

OK: GO TO 4.

NG: Repair or replace harness.

Fig 4: Checking Voltage Between Intelligent Key Unit Harness Connector M42 Terminal 28 And Ground
CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect Intelligent Key unit harness connector.
2. Check voltage between Intelligent Key unit harness connector M42 terminal 28 and ground.
  28 - Ground : Approx. 5V
OK or NG

OK: Replace front door lock assembly LH (door unlock sensor).

NG: Replace Intelligent Key unit. Refer to "REMOVAL AND INSTALLATION OF INTELLIGENT KEY UNIT ".