Nissan Sentra manuals

Nissan Sentra Service Manual: C1729 Vehicle speed signal

DTC Logic

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

DTC DETECTION LOGIC

DTC

Display Item

Malfunction detected condition

Possible causes

C1729 VHCL SPEED SIG ERR Vehicle speed signal not detected
  • CAN communication malfunction
  • BCM
  • Combination meter

DTC CONFIRMATION PROCEDURE

1.PERFORM SELF DIAGNOSTIC RESULTWith CONSULT

With CONSULT


  1. Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more without stopping.
  2. Stop the vehicle.
  3. Perform “SELF DIAGNOSTIC RESULT”.

Is DTC “C1729” detected? YES >> Proceed to WT-32, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

1.PERFORM COMBINATION METER SELF DIAGNOSTIC RESULT

Perform “SELF DIAGNOSTIC RESULT” for “METER/M&A”. Refer to MWI-17, "CONSULT With CONSULT


Perform “SELF DIAGNOSTIC RESULT” for “METER/M&A”. Refer to MWI-17, "CONSULT Function (METER/ M&A)".

Are any DTCs detected? YES >> Refer to MWI-26, "DTC Index".

NO >> GO TO 2.

2.CHECK BCM INPUT/OUTPUT SIGNAL

Check the BCM input/output signal values. Refer to BCS-29, "Reference Value" (with Intelligent Key system) or BCS-97, "Reference Value" (without Intelligent Key system).

Is the inspection result normal? YES >> Check pin terminal and connection of each harness connector for malfunctioning conditions.

NO >> Replace the BCM. Refer to BCS-73, "Removal and Installation" (with Intelligent Key system) or BCS-126, "Removal and Installation" (without Intelligent Key system).

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