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Nissan Sentra Service Manual: Diagnosis description : malfunction indicator lamp (MIL)

Nissan Sentra Service Manual / Engine / Engine control system / Operation / Diagnosis description : malfunction indicator lamp (MIL)

When emission-related ECU detects a malfunction in the emission control systems components and/or the powertrain control components (which affect vehicle emissions), it turns on/blinks MIL to inform the driver that a malfunction has been detected.

  1. The MIL illuminates when ignition switch is turned ON (engine is not running).

NOTE:

Check the MIL circuit if MIL does not illuminate. Refer to EC- 467, "Component Function Check".

  1. When the engine is started, the MIL should go off.

NOTE:


NOTE:

If MIL continues to illuminate/blink, perform self-diagnoses and inspect/repair accordingly because an emission-related ECU has detected a malfunction in the emission control systems components and/or the powertrain control components (which affect vehicle emissions).

Diagnosis description : permanent diagnostic trouble code (permanent DTC)
Permanent DTC is defined in SAE J1979/ISO 15031-5 Service $0A. ECM stores a DTC issuing a command of turning on MIL as a permanent DTC and keeps storing the DTC as a permanent DTC until ECM judg ...

On board diagnosis function
ON BOARD DIAGNOSIS ITEM The on board diagnostic system has the following functions. Diagnostic test mode Function Bulb check MIL can be checked. SRT status ECM can ...

Other materials:

P2096, P2097 A/F Sensor 1
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible Cause P2096 POST CAT FUEL TRIM SYS B1 (Post catalyst fuel trim system too lean bank 1) The output voltage computed by ECM from the A/F ...

Rear window defogger feedback signal
Description Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger. Component function check 1.Check rear window defogger feedback signal Check that the indicator lamp of rear window defogger switch is illuminated when turning the rear window ...

System description
Component parts CVT CONTROL SYSTEM CVT CONTROL SYSTEM : Component Parts Location No. Component Function 1 ECM Mainly transmits the following signal to TCM via CAN communication. Engine and CVT integrated control signal NOTE: General term for the c ...

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