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Select BACK, ENGINE, SELF DIAG RESULTS and ERASE. On 98–99 models, to erase DTCs using Consult, turn Consult On, select A/T, SELF DIAG RESULTS and ERASE. On 95–97 models, to erase DTCs using Consult, select ERASE in the SELF DIAG RESULTS mode. On all models, MIL stored memory will be erased if battery terminal is disconnected. On 95–99 models, MIL stored memory will be erased by switching from Mode II to Mode I. On pre-95 models, MIL stored memory will be erased after selecting Mode III or Mode IV. Perform each diagnostic test mode according to each service procedure.Ĭonnect scan tool' to its 16-pin DLC, located at lower edge of instrument panel near steering column.Įnter program according to screen instructions or in operation manual. Using Consult (Nissan's Diagnostic machine)Ĭonnect ˜˜Consult'' the data link connector (DLC), located behind fuse box cover. with engine running, system in front O2S monitor state. (Mode II): with engine stopped, system in self diagnostic results state. with engine running, system in malfunction warning state. (Mode I): with engine stopped, system in bulb check state. If ignition 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 I. If it helps ,its an Aus spec 1990 model,auto.Thanks. Mode V (Real time diagnosis): if a malfunction is present during a driving test, the inspection lamps will display the malfunction condition immediately. Just wondering if any one knows why ,after starting my zed there is a orange light with no icon on it on the right hand side that will flash about 5-6 times and then goes off until the next start. 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. The red inspection lamp corresponds to units of 10 the green inspection lamp corresponds to units of one. Mode III (Self diagnosis): in this mode the DTC is indicated by both the red and greed inspection lamp. The green inspection lamp function is the same as in Mode I. During an open loop condition, the red 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. The Check Engine light should now be off and the ECU reset. Start the engine and examine the instrument panel. Turn off the ignition and wait about three minutes. During an open loop condition, the green inspection lamp stays off. Press the accelerator to the floor and hold it for 10 seconds, or until the 'Check Engine' light turns on and off. Mode I (Mixture ratio feedback control monitor A): 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. On all models, when ignition 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 I.įor description of modes, proceed as follows: Note number of flashes, then immediately turn diagnostic mode selector to Off position. Turn diagnostic mode selector on ECU to On position and wait until inspection lamps flash. On Pathfinder, Pickup and Van models, proceed as follows: Note number of flashes, then immediately turn diagnostic mode selector fully counterclockwise.ģ. Number of flashes displayed indicates corresponding mode. Turn diagnostic mode selector on ECU fully clockwise and wait until inspection lamps flash. (Not sure if the 87 ECU switch works with the turbo models, I know it works with the NAs) Just make sure you get a ECU for. Error Low setting incorrect.On all models except Pathfinder, Pickup and Van, proceed as follows: A 87 ECU in a 84-85 would probably be the best choice, because it eliminates the cold start/lean surge issue found in the 84-85 300zx, but some people will argue that it is better to use the proper ECU for that year of car. Sensor voltage is going to 0V as part of normal operation but low voltage fault detection is not disabled (Error Low). The voltage at the analog input pin has been below the Error Low voltage for longer than one second. Sensor voltage is going to 5V as part of normal operation but high voltage fault detection is not disabled (Error High). The voltage at the analog input pin has been above the Error High voltage for longer than one second.