Vehicle Security Horn Alarm Check

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK VEHICLE SECURITY HORN
With CONSULT-II
1. Select "ACTIVE TEST" in "THEFT WAR ALM" with CONSULT-II.
2. Select "HORN" and touch "ON".
  
  Fig 1: Checking Vehicle Security Horn - With CONSULT-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II
1. Disconnect smart entrance control unit harness connector.
2. Apply ground to smart entrance control unit harness connector M122 terminal 42 (LG/B).
  
  Fig 2: Checking Vehicle Security Horn - Without CONSULT-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
Refer to wiring diagram in WIRING DIAGRAM - VEHSEC .

OK or NG
1. OK: Horn alarm is OK.
2. NG: GO TO 2 .
CHECK HORN RELAY
Check horn relay.

OK or NG
1. OK: GO TO 3 .
2. NG: Replace horn relay.
CHECK POWER SUPPLY FOR HORN RELAY
1. Disconnect horn relay connector.
2. Check voltage between horn relay connector E118 terminal 1 (G/B) and ground.
  
  Fig 3: Checking Power Supply For Horn Relay
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4 .
2. NG: Check the following.
  - 7.5A fuse (No. 52, located in the fuse and fusible link box)
  - Harness for open or short between horn relay and fuse
CHECK HORN RELAY CIRCUIT
1. Disconnect horn relay connector.
2. Check voltage between terminals 3 and 5.
3. Check voltage between terminals 6 and 7.
  
  Fig 4: Checking Horn Relay Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Check harness for open or short between horn relay and smart entrance control unit.
2. NG: Check the following.
  - Harness for open or short between horn relay and fuse
  - 7.5A fuse (No. 52, located in the fuse and fusible link box)
  - 10A fuse (No. 54, located in the fuse and fusible link box)