Nissan Sentra manuals

Nissan Sentra Service Manual: Diagnosis description : permanent diagnostic trouble code (permanent DTC)

Nissan Sentra Service Manual / Engine / Engine control system / Operation / 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 judges that there is no presence of malfunction.

Permanent DTCs cannot be erased by using the erase function of CONSULT or Generic Scan Tool (GST) and by disconnecting the battery to shut off power to ECM. This prevents a vehicle from passing the in-use inspection without repairing a malfunctioning part.

When not passing the in-use inspection due to more than one permanent DTC, permanent DTCs should be erased, referring to this manual.

NOTE:

PERMANENT DTC SET TIMING

The setting timing of permanent DTC is stored in ECM with the lighting of MIL when a DTC is confirmed.

Diagnosis description : system readiness test (SRT) code
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979/ISO 15031-5. As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the s ...

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 infor ...

Other materials:

Wheel alignment
Inspection PRELIMINARY INSPECTION WARNING: Always adjust the wheel alignment with the vehicle on a flat surface. NOTE: If the wheel alignment is out of specification, inspect and replace any damaged or worn rear suspension parts before making any adjustments. Check and adjust the wheel ...

Vehicle Dynamic Control (VDC) system
The Vehicle Dynamic Control (VDC) system uses various sensors to monitor driver inputs and vehicle motion. Under certain driving conditions, the VDC System helps to perform the following functions: Controls brake pressure to reduce wheel slip on one slipping drive wheel so power is trans ...

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 memory. The MIL will not illuminate at this stage. <1st trip> If the same malfunction is dete ...

В© 2014-2025 Copyright www.nisentra.com