Nissan Sentra manuals

Nissan Sentra Service Manual: P1564 ASCD Steering switch

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P1564 ASCD Steering switch

DTC Logic

DTC DETECTION LOGIC

NOTE:

If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-348, "DTC Logic".

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P1564 ASCD SW (ASCD SW)
  • An excessively high voltage signal from the ASCD steering switch is sent to ECM.
  • ECM detects that input signal from the ASCD steering switch is out of the specified range
  • ECM detects that the ASCD steering switch is stuck ON.
  • Harness or connectors (ASCD steering switch circuit is open or shorted.)
  • ASCD steering switch
  • ECM

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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. Turn ignition switch ON.
  2. Wait at least 10 seconds.
  3. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
  4. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
  5. Press ACCEL/RES switch for at least 10 seconds, then release it and wait at least 10 seconds.
  6. Press COAST/SET switch for at least 10 seconds, then release it and wait at least 10 seconds.
  7. Check DTC.

Is DTC detected? YES >> Proceed to EC-388, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT


  1. Turn ignition switch ON.
  2. Select “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode of “ENGINE” using CONSULT.
  3. Check each item indication as per the following conditions.


Without CONSULT


Without CONSULT


  1. Turn ignition switch ON.
  2. Check the voltage between ECM harness connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> GO TO 2.

2.CHECK ASCD STEERING SWITCH GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect combination switch (spiral cable) harness connector
  4. Check the continuity between combination switch (spiral cable) and ECM harness connector.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace error-detected parts.

3.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

  1. Check the continuity between ECM harness connector and combination switch.


  1. Also check harness for short to ground and to power.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK ASCD STEERING SWITCH

Refer to EC-390, "Component Inspection".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Replace ASCD steering switch. Refer to EC-15, "ENGINE CONTROL SYSTEM : Component Parts Location".

Component Inspection

1.CHECK ASCD STEERING SW

  1. Disconnect combination switch (spiral cable) harness connector.
  2. Check the resistance between combination switch harness connector terminals as per the following conditions.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

>> Replace ASCD steering switch. Refer to EC-15, "ENGINE CONTROL SYSTEM : Component Parts Location".

P1556, P1557 Battery temperature sensor
DTC Logic DTC DETECTION LOGIC NOTE: If DTC P1556 or P1557 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to EC-353, "DTC Logic". DTC No ...

P1572 ASCD Brake switch
DTC Logic DTC DETECTION LOGIC NOTE: If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-348, "DTC Logic". This self-diagnosi ...

Other materials:

Variable voltage control system
CAUTION Do not ground accessories directly to the battery terminal. Doing so will bypass the variable voltage control system and the vehicle battery may not charge completely. Use electrical accessories with the engine running to avoid discharging the vehicle battery. Your v ...

Body sealing
Description The following figure shows the areas which are sealed at the factory. Sealant which has been applied to these areas should be smooth and free from cuts or gaps. Care should be taken not to apply an excess amount of sealant and not to allow other unaffected parts to come into conta ...

Battery
Keep the battery surface clean and dry. Clean the battery with a solution of baking soda and water. Make certain the terminal connections are clean and securely tightened. If the vehicle is not to be used for 30 days or longer, disconnect the negative (-) battery terminal cable to p ...

© 2014-2025 Copyright www.nisentra.com