Nissan Versa (N17): 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 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.
  • If DTC P1720 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC, "DTC Logic".
  • If DTC P1720 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to EC, "DTC Logic".
DTC No. Trouble diagnosis DTC detecting condition Possible cause
P1720 Vehicle speed sensor (TCM output) The difference between two vehicle speed signals is out of the specified range.
  • Harness or connectors (Secondary speed sensor circuit is open or shorted.) (Wheel sensor circuit is open or shorted.)
  • TCM
  • Secondary speed sensor
  • ABS actuator and electric unit (control unit)
  • Wheel sensor
  • Combination meter

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine.
  2. Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without depressing the brake pedal.
  3. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Go to EC, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK DTC WITH TCM

Check DTC with TCM. Refer to TM, "DTC Index" (A/T models) or TM, "DTC Index" (CVT models).

Is the inspection result normal?

YES >> GO TO 2.

NO >> Perform trouble shooting relevant to DTC indicated.

2.CHECK DTC WITH "ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)"

Check DTC with "ABS actuator and electric unit (control unit)". Refer to BRC, "DTC Index".

Is the inspection result normal?

YES >> GO TO 3.

NO >> Perform trouble shooting relevant to DTC indicated.

3.CHECK COMBINATION METER FUNCTION

Check combination meter function. Refer to MWI, "DTC Index" (TYPE A) or MWI, "DTC Index" (TYPE B).

>> INSPECTION END

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 is disp ...

Other materials:

Keys
Type A (if so equipped) 1. Master key 2. Valet key 3. Key number plate A key number plate is supplied with your keys. Record the key number and keep it in a safe place (such as your wallet), not in the vehicle. If you lose your keys, it is recommended that you visit a NISSAN dealer for ...

Starting the engine (models with NISSAN Intelligent Key system)
1. Apply the parking brake. 2. Move the shift lever to P (Park) or N (Neutral). P (Park) is recommended. The starter is designed not to operate if the shift lever is in any of the driving positions. 3. Push the ignition switch to the ON position. Depress the brake pedal and push the ...

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