2. Check IPDM E/R Harness

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
3. Check continuity between IPDM E/R connector E9 terminal 51 and horn relay connector E10 terminal 1.
   1. 51 (SB) - 1 (SB) : Continuity should exist. 
      Fig 1: Checking Continuity Between IPDM E/R Connector E9 Terminal 51 And Horn Relay Connector E10 Terminal 1

      Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : Check harness connection.

NG : Repair or replace harness.