Nissan Maxima Service and Repair Manual: P1722 vehicle speed

Description

The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to TCM via CAN communication line.

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.

ACC PEDAL OPEN : 1.0/8 or less

VEHICLE SPEED : 30 km/h (19 MPH) or more

Diagnosis Procedure

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

With CONSULT

Perform "Self Diagnostic Results" in "ABS".

2.CHECK DTC WITH TCM

With CONSULT

Perform "Self Diagnostic Results" in "TRANSMISSION".

3.DETECT MALFUNCTIONING ITEMS

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

    P1709 incompleted data writing
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    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 prima ...

    Other materials:

    System description
    CAN COMMUNICATION SYSTEM CAN System Specification Chart Determine CAN system type from the following specification chart. NOTE: Refer to LAN-15, "Trouble Diagnosis Procedure" for how to use CAN system specification chart. VEHICLE EQUIPMENT IDENTIFICATION INFORMATION NOTE: Check CAN system ...

    ASCD indicator
    Description ASCD indicator lamp illuminates to indicate ASCD operation status. CRUISE is integrated in combination meter. CRUISE illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD system is ready for operation. Refer to EC-68, "System Diagram ...

    A/C switch assembly signal circuit
    Diagnosis Procedure 1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC. Check if any DTC No. is displayed in the self-diagnosis results. NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. ...

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