ECM Signal Check

CHECK THROTTLE POSITION SENSOR SIGNAL CIRCUIT
1. Disconnect ECM harness connector and ASCD control unit harness connector.
2. Check continuity between ECM terminal 113 and ASCD control unit terminal 3.
  1. Continuity should exist.
  Fig 1: Checking Continuity Between ECM Terminal 113 And ASCD Control Unit Terminal 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK >> Refer to INTERMITTENTS .
2. NG >> Repair harness.

CHECK ECM COMMUNICATION CIRCUIT
1. Check continuity between terminal 7 of ASCD control unit connector on vehicle and terminal 39 of ECM connector on vehicle.
  1. 7 to 39 : Continuity exists
  2. 7 to ground : No continuity
  Fig 2: Checking Continuity Between Terminal 7 And Terminal 39 Of ECM Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK >> GO TO 3.
2. NG >> Repair harness.
CHECK ECM
1. Check ECM.
  Refer to DTC P0605: ECM .
OK or NG
1. OK >> ECM is OK.
2. NG >> Replace ECM.