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Nissan Sentra Service Manual: On Board Diagnostic (OBD) System of Engine and CVT

Nissan Sentra Service Manual / Engine / Engine control system / Precaution / On Board Diagnostic (OBD) System of Engine and CVT

The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the driver of a malfunction causing emission deterioration.

CAUTION:

Precaution for Procedure without Cowl Top Cove.r.
When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc to prevent damage to windshield. ...

General Precautions
Always use a 12 volt battery as power source. Do not attempt to disconnect battery cables while engine is running. Before connecting or disconnecting the ECM harness connector, turn ignitio ...

Other materials:

P1225 TP Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P1225 CTP LEARNING-B1 (Closed throttle position learning bank 1) Closed throttle position learning value is excessively low. E ...

Ambient sensor signal circuit
Description It detects outside air temperature and converts it into a resistance value which is then input into the combination meter. Diagnosis Procedure Regarding wiring diagram information, refer to mwi-28, "wiring diagram". 1.Check ambient sensor signal circuit Turn igniti ...

Symptom diagnosis
CVT CONTROL SYSTEM Symptom Table The diagnosis item number indicates the order of check. Start checking in the order from 1. ...

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