Nissan Sentra Service Manual: Hvac branch line circuit
Diagnosis procedure
1.Check connector
- Turn the ignition switch off.
- Disconnect the battery cable from the negative terminal.
- Check the terminals and connectors of the a/c auto amp. For damage, bend and loose connection (unit side and connector side).
Is the inspection result normal? Yes >> go to 2.
No >> repair the terminal and connector.
2.Check harness for open circuit
- Disconnect the connector of A/C auto amp.
- Check the resistance between the a/c auto amp. Harness connector terminals.
Is the measurement value within the specification? Yes >> go to 3.
No >> repair the a/c auto amp. Branch line.
3.Check power supply and ground circuit
Check the power supply and the ground circuit of the a/c auto amp. Refer to hac-83, "a/c auto amp. : Diagnosis procedure".
Is the inspection result normal? Yes (present error)>>replace the a/c auto amp. Refer to hac-105, "removal and installation".
Yes (past error)>>error was detected in the a/c auto amp. Branch line.
No >> repair the power supply and the ground circuit.
Av branch line circuit
Diagnosis Procedure
1.Check connector
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the av control unit for dama ...
BCM branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the bcm for damage, bend and ...
Other materials:
P1148 Closed loop control
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC P1148 is displayed with DTC for A/F sensor 1.
When the DTC is detected, perform the trouble diagnosis of DTC corresponding to
A/F sensor 1.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible ca ...
Sport mode control
SPORT MODE CONTROL : System Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
SPORT mode that keeps high engine revolution and provides direct feel
and acceleration performance suitable
for driving on winding road.
ECM receives an SPORT mode signal from TCM via CAN communication and
...
Ecu diagnosis information
Abs actuator and electric unit
(control unit)
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The display shows the control unit calculation data, so a
normal value might be displayed even in the
event the output circuit (harness) is open or short-circuited.
...
