Nissan Sentra Service Manual: On board diagnostic (OBD) system
Diagnosis Description
This system is an on board diagnostic system that records exhaust emission-related diagnostic information and detects a sensors/actuator-related malfunction. A malfunction is indicated by the malfunction indicator lamp (MIL) and stored in ECU memory as a DTC. The diagnostic information can be obtained with the diagnostic tool (GST: Generic Scan Tool).
GST (Generic Scan Tool)
When GST is connected with a data link connector equipped on the vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various kinds of diagnostic tests. Refer to GI-47, "Description".
NOTE:
Service $0A is not applied for regions where it is not mandated.
Automatic speed control device (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : Switch Name and Function
SWITCHES AND INDICATORS
CRUISE indicator
SET indicator*
CANCEL switch
ACCEL/RES switch
COAST/SET switch
ASCD MAIN sw ...
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 ...
Other materials:
Front suspension assembly
Inspection
COMPONENT PART
Check the mounting conditions (looseness, backlash) of each component. Verify
the component conditions
(wear, damage) are normal.
Ball Joint Axial End Play
Set the front wheels in a straight-ahead position.
Hold the axle side of the transverse link, and check th ...
P0850 PNP Switch
Description
For CVT models, transmission range switch is turn ON when the selector lever
is P or N.
For M/T models, park/neutral position (PNP) range switch is ON when the selector
lever is Neutral position.
ECM detects the position because the continuity of the line (the ON) exists.
DTC ...
U0155 Lost communication (IPC)
DTC Logic
DTC DETECTION LOGIC
DTC
CONSULT screen terms
[Trouble diagnosis content]
DTC detection condition
Possible causes
U0155
LOST COMM (IPC)
[Lost Communication With Instrument
Panel Cluster (IPC)
Control Module]
When the ignition switch is ON, TCM is ...
