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  #1  
Old 12-12-2012, 02:50 PM
jp2code jp2code is offline
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Default Trouble Codes for Nissan 1988-1995

Posting here just in case the website is gone one day or no one else knows about it.
Nissan Trouble Code Info
ENTERING SELF-DIAGNOSTICS
Using (MIL)

88–94
  1. Turn ignition On.
  2. On all models except Pathfinder, Pickup and Van, proceed as follows:
    1. Turn diagnostic mode selector on ECU fully clockwise and wait until inspection lamps flash. Number of flashes displayed indicates corresponding mode.
    2. Note number of flashes, then immediately turn diagnostic mode selector fully counterclockwise.
  3. On Pathfinder, Pickup and Van models, proceed as follows:
    1. Turn diagnostic mode selector on ECU to On position and wait until inspection lamps flash.
    2. Note number of flashes, then immediately turn diagnostic mode selector to Off position.
  4. 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.
  5. For description of modes, proceed as follows:
    1. 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. During an open loop condition, the green inspection lamp stays off.
    2. 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 an open loop condition, the red inspection lamp stays off. The green inspection lamp function is the same as in Mode I.
    3. Mode III (Self diagnosis): in this mode the DTC is indicated by both the red and greed inspection lamp. The red inspection lamp corresponds to units of 10; the green inspection lamp corresponds to units of one.
    4. 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.
    5. Mode V (Real time diagnosis): if a malfunction is present during a driving test, the inspection lamps will display the malfunction condition immediately.

READING DIAGNOSTIC CODES


The Electronic Control Unit (ECU) monitors several engine sensors and actuators. If a problem occurs the information is stored in the ECU's memory for retrieval.
The codes are displayed by the red diode on the ECU. The codes are interpreted by the number of times and duration the diode flashes.
The red diode will flash for 0.6 of a second with 0.6 of a second delay between flashes "X" number of times, this will represent units of ten.
Then there will be a delay 0.9 of a second and the red diode will flash for 0.3 of a second with 0.3 of a second delay between flashes "X" number of times, this will represent units of one.
There will be a delay of 2.1 seconds between codes.
For example, if the red diode flashes once and then flashes twice rapidly this should be interpreted as code 12. The codes are displayed in numerical order starting with the lowest and ending with the highest.

95–99
  1. Turn ignition On.
  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 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.
  5. For description of modes, proceed as follows:
    • (Mode I): 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 O2S monitor state.

Using Consult

  1. Turn ignition Off.
  2. Connect ‘‘Consult’’ the data link connector (DLC), located behind fuse box cover.
  3. Turn ignition On.
  4. Touch [Start].
  5. Touch [Engine].
  6. Perform each diagnostic test mode according to each service procedure.

Using Generic Scan Tool

  1. Turn ignition Off.
  2. Connect scan tool’ to its 16-pin DLC, located at lower edge of instrument panel near steering column.
  3. Turn ignition On.
  4. Enter program according to screen instructions or in operation manual.
  5. Perform each diagnostic test mode according to each service procedure.

Clearing Trouble Codes

  1. On pre-95 models, MIL stored memory will be erased after selecting Mode III or Mode IV.
  2. On 95–99 models, MIL stored memory will be erased by switching from Mode II to Mode I.
  3. On all models, MIL stored memory will be erased if battery terminal is disconnected.
  4. On 95–97 models, to erase DTCs using Consult, select ERASE in the SELF DIAG RESULTS mode.
  5. On 98–99 models, to erase DTCs using Consult, turn Consult On, select A/T, SELF DIAG RESULTS and ERASE. Select BACK, ENGINE, SELF DIAG RESULTS and ERASE.
  6. On all models, to erase DTCs using generic scan tool (GST), select mode 4.

Nissan UD Diesel

ID-TICS System
  1. Place diagnostic switch in the Off position.
  2. Carry out diagnosis under the following three conditions:
    • Place ignition switch in the On position.
    • Crank engine.
    • Start and operate engine.
  3. The trouble codes will be displayed by the flashing Engine Control Lamp and the Overheat Warning Lamp and the Overheat Warning Buzzer.

Trouble Code Interpretation
MID-TICS System


The diagnostic trouble codes will be displayed by the check engine lamp. For example, a code 12 will be displayed by the check engine lamp flashing 1 time for approximately 1.2 seconds, followed by a 0.6 second pause, then 2 short flashes. Each trouble code will be displayed 3 times before the next trouble code is displayed.

Clearing Trouble Codes
88-94

  1. Turn the ignition key on.
  2. Turn the diagnostic mode selector on the ECU fully clockwise and wait more than two seconds then turn the selector fully counterclockwise. The ECCS system is now in mode 2.
  3. Turn the diagnostic mode selector on the ECU fully clockwise and wait more than two seconds then turn the selector fully counterclockwise. The ECCS system is now in mode 1. ECU memory is now erased.

MID-TICS System

  1. Release diagnostic switch.
  2. Place ignition switch in On position.
  3. Check that Overheat Warning Lamp is displaying Diagnostic Display Code.
  4. Connect memory clear connector 2400400Z09, or a suitable jumper wire to reset switch terminals. The reset switch is located behind the electrical unit board.
  5. Check that Overheat Warning Lamp and Buzzer display shows Diagnostic Display Code 0–1. The System memory will be cleared in approximately 10 seconds.
  6. Remove connector or jumper wire from reset switch electrical connector.
  7. Connect electrical connector to reset switch.
  8. Place ignition switch in Off position.
  9. Place ignition switch in On position, then check Overheat Warning Lamp and Buzzer. Diagnostic Display Code 0–1 should be indicated.

Reference: http://www.troublecodes.net/Nissan/
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~Joe (not a mechanic!)
1994 Heavy Duty D21, Long Bed, 2WD, V6, 5-speed
Free Hardbody Service Manuals: -
Trouble Codes for Nissan 1988-1995: http://nissanforum.org/nissan-forum/showthread.php?t=23202

Last edited by jp2code; 01-12-2013 at 04:18 PM.
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  #2  
Old 12-12-2012, 03:12 PM
jp2code jp2code is offline
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Default 8894 & 95 Pathfinder, Quest, Truck & 300ZX

Codes:


_MIL_|Consult|_Description
_11__|_P0340_|_Crank Angle Sensor/CMP Sensor
_12__|_P0100_|_Air Flow Meter/MAF Sensor
_13__|_P0115_|_ECT Sensor
_14__|_P0500_|_VSS
_21__|_P1320_|_Ignition Signal
_22__|_P0505_|_Fuel Pump
_23__|_P0605_|_Idle Switch (On/Off Diagnosis)
_24__|_P0400_|_Throttle Valve Switch
_25__|_P0150_|_ISC Valve
_28__|_P1900_|_Cooling Fan Circuit (Overheat)
_31__|_P0325_|_ECM
_32__|_P1401_|_EGR Function
_33__|_P0402_|_HO2S
34&37|_P0130_|_Knock Sensor
_35__|_P0150_|_Exhaust Gas Temperature Sensor
_36__|_P0402_|_EGRC-BPT Valve
_38__|_P0150_|_LH Bank Closed Loop (B2)
_41__|_P0110_|_IAT Sensor
_42__|_P0180_|_Fuel Temperature Sensor
_43__|_P0120_|_TP Sensor
_45__|__N/A__|_Injector Leak
_47__|_P1335_|_CKP Sensor
_51__|__N/A__|_Injector Circuit
_53__|_P0130_|_O2S
_54__|_P0600_|_A/T Control
_55__|_P0000_|_No Malfunction
_63__|_P0306_|_No. 6 Cylinder Misfire
_64__|_P0305_|_No. 5 Cylinder Misfire
_65__|_P0304_|_No. 4 Cylinder Misfire
_66__|_P0303_|_No. 3 Cylinder Misfire
_67__|_P0302_|_No. 2 Cylinder Misfire
_68__|_P0301_|_No. 1 Cylinder Misfire
_71__|_P0300_|_Random Misfire
_72__|_P0420_|_TWC Function RH Bank
_73__|_P0430_|_TWC Function LH Bank
_76__|_P0170_|_Fuel Injection System Function RH Bank
_77__|_P0136_|_Rear HO2S Circuit
_82__|_P0335_|_CKP Sensor
_84__|_P1605_|_A/T Diagnosis Communication Line
_85__|_P1110_|_VTC Solenoid Valve Circuit
_86__|_P0173_|_Fuel Injection System Function LH Bank
_87__|_P0443_|_Canister Control Solenoid Valve Circuit
_91__|_P0135_|_Front HO2S Heater Circuit RH Bank
_94__|_P1550_|_TCC Solenoid Valve
_95__|_P1336_|_CKP Sensor
_98__|_P0125_|_ECT Sensor
_101_|_P0155_|_Front HO2S Heater Circuit LH Bank
_103_|_P0705_|_PNP Switch Circuit
_105_|_P1400_|_EGR And EGR Canister Control Solenoid Valve Circuit
_108_|_P0443_|_Canister Purge Control Valve Circuit
_N/A_|_P0600_|_Continuous Improper A/T Control Unit Voltage To ECM

Reference: http://www.troublecodes.net/Nissan/88-9495pthqust.shtml
__________________
~Joe (not a mechanic!)
1994 Heavy Duty D21, Long Bed, 2WD, V6, 5-speed
Free Hardbody Service Manuals: -
Trouble Codes for Nissan 1988-1995: http://nissanforum.org/nissan-forum/showthread.php?t=23202
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  #3  
Old 12-13-2012, 01:15 PM
cadillacdude1975 cadillacdude1975 is offline
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Default

if you have access to alldata pro, these steps are listed there as well. but thanks for a useful post. not everyone has access to the pro version of alldata.

the earlier hardbody (87 and older) trucks are a bit different. you have to remove the passenger seat. not that big of a deal, its 4 bolts. the ECM is bolted to the floor under the seat. when i was troubleshooting mine, i had to unbolt it from the floor so i could read the flashing lights. on my 87, i had to remove a plug that covered the insides, where the flashing light is located. i put it in diag mode, which is setting 3 i think, with a screwdriver. then you power the ignition and watch and count the flashes.

Last edited by cadillacdude1975; 12-13-2012 at 01:17 PM.
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  #4  
Old 12-13-2012, 01:29 PM
jp2code jp2code is offline
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Default

There's a guy on IN with an 87 that is throwing a code, and no one can figure it out: code 43 help. Would that still be TP Sensor?

I've been trying to help the guy, but I just don't know what else to tell him to try.
__________________
~Joe (not a mechanic!)
1994 Heavy Duty D21, Long Bed, 2WD, V6, 5-speed
Free Hardbody Service Manuals: -
Trouble Codes for Nissan 1988-1995: http://nissanforum.org/nissan-forum/showthread.php?t=23202
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  #5  
Old 12-15-2012, 02:22 AM
cadillacdude1975 cadillacdude1975 is offline
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according to alldata for the 87 with the 4 banger, it shows as :
Code 43 -- Pathfinder, Pickup & Van. Injector circuit malfunction.

put your email here, and i have the screen grabs from alldata pro telling exactly how to diagnose and repair that problem. you can forward it to him.
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  #6  
Old 12-18-2012, 02:53 PM
YEPEE YEPEE is offline
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Default

can this be made a sticky?
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  #7  
Old 12-22-2012, 10:21 AM
cadillacdude1975 cadillacdude1975 is offline
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images attached to show test points
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  #8  
Old 07-20-2013, 01:06 AM
rslsund rslsund is offline
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Default

very good and general obd2 error code table: http://www.spobd2.com/service/diagno...wnload-38.html
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  #9  
Old 07-05-2019, 05:41 PM
Jacksonjim Jacksonjim is offline
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Posts: 4
Default 89 d21

I show a code for a Mass air flow.
Do you just clean them?
Or replace them?

Thanx for your time!
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  #10  
Old 07-05-2019, 05:49 PM
Jacksonjim Jacksonjim is offline
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Posts: 4
Default D21 Leaky injector

I have a code for leaky injector.
How do I figure out which one?
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