Counter System Chart

COUNTER SYSTEM CHART

Items

Fuel Injection System

Misfire

Other

MIL (turns OFF)

3 (pattern B)

DTC, Freeze Frame Data (no display)

80 (pattern C)

40 (pattern A)

1st Trip DTC (clear)

1 (pattern C), ⁽¹⁾

1 (pattern B)

1st Trip Freeze Frame Data (clear)

⁽¹⁾, ⁽²⁾

1 (pattern B)

⁽¹⁾	Clear timing is at the moment OK is detected.

⁽²⁾	Clear timing is when the same malfunction is detected in the 2nd trip.

For details about patterns B and C under "Fuel Injection System" and "Misfire", see EXPLANATION FOR DRIVING PATTERNS FOR MISFIRE & FUEL INJECTION SYSTEM.

For details about patterns A and B under Other, see EXPLANATION FOR DRIVING PATTERNS FOR MISFIRE & FUEL INJECTION SYSTEM..

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

Fig 1: Relationship Diagram Between MIL, DTC, Driving Pattern With Misfire

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

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

< Driving Pattern B >

Driving pattern B means the vehicle operation as per the following:

All components and systems should be monitored at least once by the OBD system.

The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
The B counter will be counted up when driving pattern B is satisfied without any malfunction.
The MIL will turn OFF when the B counter reaches 3. (*2 in "OBD SYSTEM OPERATION CHART")

< Driving Pattern C >

Driving pattern C means operating vehicle as per the following:

The following conditions should be satisfied at the same time:

Engine speed: (Engine speed in the freeze frame data) ±375 RPM

Calculated load value: (Calculated load value in the freeze frame data) x (1±0.1) [%]

Engine coolant temperature (T) condition:

When the freeze frame data shows lower than 70°C (158°F), T should be lower than 70°C (158°F).
When the freeze frame data shows higher than or equal to 70°C (158°F), T should be higher than or equal to 70°C (158°F).

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)

The C counter will be cleared when the malfunction is detected regardless of vehicle conditions above.
The C counter will be counted up when vehicle conditions above are satisfied without the same malfunction.
The DTC will not be displayed after C counter reaches 80.
The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC is stored in ECM.

Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns Except For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"

Fig 2: Relationship Diagram Between MIL, DTC, Driving Pattern Except Misfire

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

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

< Driving Pattern A >

Fig 3: Driving Pattern A

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

The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
The DTC will not be displayed after the A counter reaches 40.

< Driving Pattern B >

Driving pattern B means operating vehicle operation as per the following:

All components and systems should be monitored at least once by the OBD system.

The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
The MIL will turn OFF when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).