Entering Diagnostic Test Modes

Turn ignition off. Connect scan tool to DLC. See Fig 1 or Fig 2 . Turn ignition on. Press START on scan tool. Press ENGINE. Select one of the following diagnostic test modes:

• WORK SUPPORT
  
  This mode enables a technician to adjust some devices faster and more accurately by following indications on CONSULT-II unit. See WORK SUPPORT MODE  .
• SELF-DIAGNOSTIC RESULTS
  
  Self-diagnostic results such as 1st trip DTC, DTCs, 1st trip freeze frame data or freeze frame data can be read and erased quickly. See SELF-DIAGNOSTIC RESULTS MODE  .
• DATA MONITOR
  
  Input/output data in ECM can be read. See DATA MONITOR MODE  .
• DATA MONITOR (SPEC)
  
  Input/output specification of basic fuel schedule, AFM, A/F feedback control value and other data monitor items can be read. See DATA MONITOR (SPEC) MODE  .
• ACTIVE TEST
  
  Diagnostic test mode in which CONSULT-II drives some actuators apart from ECMs and also shifts some parameters in a specified range. See ACTIVE TEST MODE  .
• DTC & SRT CONFIRMATION
  
  The status of system monitoring tests and self-diagnosis status/result can be confirmed.
• ECM PART NUMBER
  
  ECM part number can be read.

Fig 1: Locating Data Link Connector (Frontier)

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

Fig 2: Locating Data Link Connector (Xterra)

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