Nissan Maxima Service and Repair Manual: P1720 VSS
Description
ECM receives two vehicle speed signals via the CAN communication line. One is sent from "ABS actuator and electric unit (control unit)" via the combination meter, and the other is from TCM (Transmission control module).
ECM uses these signals for engine control.
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC P1720 is displayed with DTC UXXXX first perform the trouble diagnosis for DTC UXXXX. Refer to EC-161, "DTC Logic".
- If DTC P1720 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to EC-393, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine.
- Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without depressing the brake pedal.
- Check 1st trip DTC.
Diagnosis Procedure
1.CHECK DTC WITH TCM
Check DTC with TCM.
2.CHECK DTC WITH "ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)"
3.CHECK COMBINATION METER FUNCTION
P1715 input speed sensor
Description
ECM receives input speed sensor signal from TCM via the CAN communication
line. ECM uses this signal for
engine control.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P1715 ...
P1800 vias control solenoid valve 1
Description
The VIAS control solenoid valve 1 cuts the intake manifold vacuum signal for
power valve 1 control. It
responds to ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum
...
Other materials:
Wiring diagram
AIR CONDITIONER CONTROL
Wiring Diagram - With Color Display
...
Inspection and adjustment
Preliminary Check
1. FOREIGN OBJECTS
Check the following:
objects on or behind the seats that could cause binding
objects under the seats that may be interfering with the seat's
moving parts
objects under pedals that may interfere with movement
Are there any foreign objects that coul ...
Refrigeration system
Inspection
1.CHECK BLOWER MOTOR OPERATION
Check blower motor operation
2.CHECK COMPRESSOR OPERATION
Check compressor operatio
3.CHECK REFRIGERANT CYCLE PRESSURE
Connect recovery/recycling recharging equipment to the vehicle and perform
the diagnosis with the gauge pressure. Refer to HA ...
Nissan Maxima Owners Manual
- Illustrated table of contents
- Safety-Seats, seat belts and supplemental restraint system
- Instruments and controls
- Pre-driving checks and adjustments
- Monitor, climate, audio, phone and voice recognition systems
- Starting and driving
- In case of emergency
- Appearance and care
- Do-it-yourself
- Maintenance and schedules
- Technical and consumer information
Nissan Maxima Service and Repair Manual
0.0145