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Nissan Code Retrieval

Accessing Diagnostic Trouble Codes

Using Malfunction Indicator Lamp

Up To 1994

Place ignition switch in On position. On all models except Pathfinder, Pickup and Van proceed as follows:

Turn diagnostic mode selector on ECU fully clockwise and wait until inspection lamps flash. Number of flashes displayed indicates corresponding Mode.

Note number of flashes, then immediately turn diagnostic mode selector fully counterclockwise. On Pathfinder, Pickup & Van, proceed as follows:

Turn diagnostic mode selector on ECU to the On position and wait until inspection lamps flash.

Note number of flashes, then immediately turn diagnostic mode selector to the Off position.

On all models, when ignition switch is turned Off during diagnosis, in each mode, and then turned back on again after power to the ECU has dropped off completely, diagnosis will automatically return to Mode 1. For description of modes, proceed as follows:

Mode I (Mixture ratio feedback control monitorA): During a closed loop condition, the green inspection lamp turns On when lean condition is present and goes Off when a rich condition is present.

During a open loop condition, the green inspection lamp stays Off.

Mode II (Mixture ratio feedback control monitor B): During a closed loop condition, the red inspection lamp turns On and Off simultaneously with the green inspection lamp when mixture ratio is controlled within a predetermined value.

During a open loop condition, the red inspection lamp stays Off. The green inspection lamp function is the same as Mode 1. Mode III (Self-diagnosis): In this mode the diagnostic trouble code is indicated by both the red and greed inspection lamp. The red inspection lamp corresponds to units of ten and the green inspection lamp corresponds to units of one. Mode IV (Switches On/Off diagnosis): During this mode, the inspection lamps monitor switch On/Off condition of the throttle valve switch, starter switch and vehicle speed sensor. Mode V (Real time diagnosis): If a malfunction is present during a driving test, the inspection lamps will display the malfunction condition immediately.

From 1995

  1. Place ignition switch in On position.
  2. Turn diagnostic mode selector on ECU fully clockwise and wait until inspection lamps flash. Number of flashes displayed indicates corresponding mode.
  3. Note number of flashes, then immediately turn diagnostic mode selector fully counterclockwise.
  4. If ignition switch is turned Off during diagnosis, in each Mode, and then turned back on again after power to the ECU has dropped off completely, diagnosis will automatically return to mode.
  5. For description of modes, proceed as follows:

(Mode 1) With engine stopped, system in bulb check state. With engine running system in malfunction warning state.

(Mode II) With engine stopped, system in self-diagnostic results state. With engine running, system in front 02S monitor state.

Using Consult

  1. Place ignition switch in Off position.
  2. Connect "Consult" to data link connector for Consult, located behind the fuse box cover.
  3. Place ignition switch in On position.
  4. Touch "Start".
  5. Touch "Engine".
  6. Perform each diagnostic test mode according to each service procedure.

Using Generic Scan Tool (GST)

  1. Place ignition switch in Off position.
  2. Connect "GST" to data link connector for GST, located near the center console right hand side cover.
  3. Place ignition switch in On position.
  4. Enter the program according to instruction on the screen or in operation manual.
  5. Perform each diagnostic test mode according to each service procedure.

Clearing Diagnostic Trouble Codes

  1. Malfunction indicator lamp (MIL) stored memory will be erased if battery terminal is disconnected or after selecting Mode  III or Mode IV on pre-1995 models, or switching from Mode II to Mode I on 1995-96 models.
  2. To erase DTC's using Consult, select "Erase" in the "Self Diag Results" mode.
  3. To erase DTC's, using generic scan tool (GST) select mode 4.

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