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Nissan Sentra Service Manual: C1609 Vehicle speed signal

Nissan Sentra Service Manual / Steering / Steering control system / DTC/circuit diagnosis / C1609 Vehicle speed signal

DTC Logic

Dtc detection logic

DTC

 Display item

 Malfunction detected condition

 Possible cause
C1609 CAN VHCL SPEED
  • Malfunction is detected in vehicle speed signal that is output from abs actuator and electric unit (control unit) via can communication.
  • ABS actuator and electric unit (control unit) input signal malfunction is detected.
  • Harness or connector (CAN communication line)
  • EPS control unit
  • Abs malfunction
  • Vehicle speed signal malfunction

Dtc confirmation procedure

1.PRECONDITIONING

If dtc confirmation procedure has been previously conducted, always turn ignition switch off and wait at least 10 seconds before conducting the next test.

>> Go to 2.

2.Dtc reproduction procedure

With consult


  1. Turn the ignition switch OFF to ON.

  2. Perform EPS self-diagnosis.

Is DTC c1609 detected? Yes >> proceed to diagnosis procedure. Refer to stc-29, "diagnosis procedure".

No >> inspection end.

Diagnosis Procedure

1.Perform abs actuator and electric unit (control unit) self-diagnosis

With consult


  1. Turn the ignition switch off to on.

  2. Perform ABS self-diagnosis.

Is any dtc detected? Yes >> check the dtc. Refer to stc-14, "dtc index".

No >> go to 2.

2.CHECK TERMINALS AND HARNESS CONNECTORS

Check eps control unit pin terminals for damage or loose connection with harness connector.

Is the inspection result normal? Yes >> go to 3.

No >> repair or replace the malfunctioning parts.

3.Perform self-diagnosis

Perform EPS self-diagnosis. With consult


Perform EPS self-diagnosis.

Is dtc c1609 detected? Yes >> replace eps control unit. Refer to stc-39, "removal and installation".

No >> check intermittent incident. Refer to gi-39, "intermittent incident".

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Precaution for Work
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