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Nissan Sentra Service Manual: Diagnosis description : counter system

Nissan Sentra Service Manual / Engine / Engine control system / Operation / Diagnosis description : counter system

RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS

Counter system chart

For details about patterns B and C under “Fuel Injection System” and


For details about patterns B and C under “Fuel Injection System” and “Misfire”, see “EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”.

For details about patterns A and B under Other, see “EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”.

Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns for “Misfire <Exhaust Quality Deterioration>”, “Fuel Injection System”


  1. When the same malfunction is detected in two consecutive trips, MIL will light up.
  2. MIL will turn OFF after vehicle is driven 3 times (pattern B) without any malfunctions.
  3. When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data will be stored in ECM.
  4. The DTC and the freeze frame data will not be displayed any longer after vehicle is driven 80 times (pattern C) without the same malfunction. (The DTC and the freeze frame data still remain in ECM.)
  5. When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data will be stored in ECM.
  6. The 1st trip DTC and the 1st trip freeze frame data will be cleared at the moment OK is detected.
  7. When the same malfunction is detected in the 2nd trip, the 1st trip freeze frame data will be cleared.
  8. 1st trip DTC will be cleared when vehicle is driven once (pattern C) without the same malfunction after DTC is stored in ECM.

Explanation for Driving Patterns for “Misfire <Exhaust Quality Deterioration>”, “Fuel Injection System”

Driving Pattern B

Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".

Driving Pattern C

Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".

Example: If the stored freeze frame data is as per the following: Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F) To be satisfied with driving pattern C, the vehicle should run under the following conditions: Engine speed: 475 – 1,225 rpm, Calculated load value: 27 – 33%, Engine coolant temperature: more than 70°C (158°F) Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns Except For “Misfire <Exhaust Quality Deterioration>”, “Fuel Injection System”


  1. When the same malfunction is detected in two consecutive trips, MIL will light up.
  2. MIL will turn OFF after vehicle is driven 3 times (pattern B) without any malfunctions.
  3. When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data will be stored in ECM.
  4. The DTC and the freeze frame data will not be displayed any longer after vehicle is driven 40 times (pattern A) without the same malfunction.

    (The DTC and the freeze frame data still remain in ECM.)

  5. When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data will be stored in ECM.
  6. 1st trip DTC will be cleared after vehicle is driven once (pattern B) without the same malfunction.
  7. When the same malfunction is detected in the 2nd trip, the 1st trip freeze frame data will be cleared.

Explanation for Driving Patterns Except for “Misfire <Exhaust Quality Deterioration>”, “Fuel Injection System”

Driving Pattern A

Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".

Driving Pattern B

Refer to EC-60, "DIAGNOSIS DESCRIPTION : Driving Pattern".

Diagnosis system (ECM)
Diagnosis description : 1st trip detection logic and two trip detection logic When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the ECM ...

Diagnosis description : driving pattern
DRIVING PATTERN A Driving pattern A means a trip satisfying the following conditions. Engine speed reaches 400 rpm or more. Engine coolant temperature rises by 20В°C (36В°F) or more after s ...

Other materials:

Environmental factors influence the rate of corrosion
Moisture Accumulation of sand, dirt and water on the vehicle body underside can accelerate corrosion. Wet floor coverings will not dry completely inside the vehicle and should be removed for drying to avoid floor panel corrosion. Relative humidity Corrosion will be accelerated in areas of h ...

P0101, P0102, P0103 MAF Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0101 MAF SEN/CIRCUIT-B1 (Mass or volume air flow “A” circuit range/performance) An excessively high voltage from the mass ...

Washer nozzle & tube
Exploded view Check valve Washer tube Washer tank Washer pump Washer nozzle Clip Washer nozzle Washer nozzle : removal and installation REMOVAL Disconnect the washer nozzle from the hood by pushing on the nozzle in the order and direction shown. Disconnect the ...

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