Door Switch Check

CHECK DOOR SWITCH INPUT SIGNAL
Check voltage between smart entrance control unit connector M110 terminals 1 (G/R), 2 (R/B) or 3 (R/B) (Crew Cab with vehicle security system) and ground.

Fig 1: Checking Voltage Between Smart Entrance Control Unit Connector M110 Terminals 1 (G/R), 2 (R/B) Or 3 (R/B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to WIRING DIAGRAM - KEYLES - .

OK or NG
1. OK: Door switch is OK.
2. NG: GO TO 2.
CHECK DOOR SWITCH
1. Disconnect door switch harness connector.
2. Check continuity between door switch terminals.
  
  Fig 2: Checking Continuity Between Door Switch Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Door switch is pressed : Continuity should not exist.
  
  Door switch is released : Continuity should exist.
OK or NG
1. OK: Check the following.
  - Front door switch LH ground circuit or door switch ground condition
  - Harness for open or short between smart entrance control unit and door switch
2. NG: Replace door switch.