2012 Infiniti M37 BaseFACTORY OEM SERVICE PROCEDURE

Counter System Chart

Items Fuel Injection System Misfire Other
MIL (turns OFF) 3 (pattern B) 3 (pattern B) 3 (pattern B)
DTC, Freeze Frame Data (no display) 80 (pattern C) 80 (pattern C) 40 (pattern A)
1st Trip DTC (clear) 1 (pattern C), (1) 1 (pattern C), (1) 1 (pattern B)
1st Trip Freeze Frame Data (clear) (1), (2) (1), (2) 1 (pattern B)
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" below.
For details about patterns A and B under Other, see "EXPLANATION FOR DRIVING PATTERNS FOR "MISFIRE < EXHAUST QUALITY DETERIORATION >", "FUEL INJECTION SYSTEM" below.
(1) Clear timing is at the moment OK is detected.
(2) Clear timing is when the same malfunction is detected in the 2nd trip.

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, 1st Trip DTC And Driving Patterns For Misfire And Fuel Injection System
G08649117Courtesy of NISSAN NORTH AMERICA, INC.

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

Driving Pattern B

Refer to "DIAGNOSIS DESCRIPTION: DRIVING PATTERN ".

Driving Pattern C

Refer to "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"

Fig 2: Relationship Diagram Between MIL, DTC, 1st Trip DTC And Driving Patterns Except For Misfire And Fuel Injection System
G08649118Courtesy of NISSAN NORTH AMERICA, INC.

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

Driving Pattern A

Refer to "DIAGNOSIS DESCRIPTION: DRIVING PATTERN ".

Driving Pattern B

Refer to "DIAGNOSIS DESCRIPTION: DRIVING PATTERN ".

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.