Nissan Sentra Service Manual: 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:
- The important items in in-use inspection are that MIL is not ON, SRT test items are set, and permanent DTCs are not included.
- Permanent DTCs do not apply for regions that permanent DTCs are not regulated by law.
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:
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 ...
1144 Incomplete steering angle sensor adjustment
DTC Logic
Dtc detection logic
Dtc
Display item
Malfunction detected condition
Possible causes
C1144
St ang sen signal
When neutral position adjustment of steering angle
sensor is not complete.
Harness or connector
Steering angle sensor
Abs actu ...
Cooler pipe and hose
Exploded view
High-pressure service port
High-pressure pipe
Expansion valve
Low-pressure service port
Low-pressure flexible hose
Compressor
Refrigerant pressure sensor
Condenser and liquid tank assembly
High-pressure flexible hose
Low-pressure flexible hose
Low-pressure f ...
