Nissan Maxima Service and Repair Manual: P1723 speed sensor

Description

The secondary speed sensor detects the revolution of parking gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.

The primary speed sensor detects the primary pulley revolution speed and sends a signal to the TCM.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.

Then wait at least 10 seconds before performing the next test.

1.CHECK DTC DETECTION

With CONSULT

  1.  Turn ignition switch ON.

  2.  Select "Data Monitor" in "TRANSMISSION".

  3.  Start engine and maintain the following conditions for at least 5 consecutive seconds.

VEHICLE SPEED : 10 km/h (6 MPH) or more

ACC PEDAL OPEN : More than 1.0/8

RANGE : "D" position

ENG SPEED : 450 rpm or more

Driving location : Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.

Diagnosis Procedure

1.CHECK STEP MOTOR FUNCTION

Perform "Self Diagnostic Results" in "TRANSMISSION".

2.CHECK SECONDARY SPEED SENSOR SYSTEM

Check secondary speed sensor system. Refer to TM-60, "DTC Logic".

3.CHECK PRIMARY SPEED SENSOR SYSTEM

Check primary speed sensor system. Refer to TM-57, "DTC Logic".

4.CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system. Refer to TM-64, "DTC Logic".

5.DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.

    P1722 vehicle speed

    P1726 throttle control signal