Help with code P1564


I have a 2003 Maxima 3.5, 6 -speed.
I keep getting code P1564, it says it's the ASCD but my cruise control is working fine.


My question is do I have to replace the ASCD switch that's on the steering wheel ~OR~ the ASCD switch that's on the floor behind the clutch pedal?

Which switch am I supposed to replace?

 

does your cruise cancel when the clutch is pressed, or the brake pedal? do your brake light illuminate when the brake pedal is pressed?

most likely its cancel switch on the clutch, usually if its the steering wheel controls that dont work it wont pull a light because that it not an emergency cancel switch, if you can get ahold of a good scan tool, you can monitor the switch see if its turning on and off when the pedal is pressed and let off, or pull out the switch, and ohm it out both with and without the button pressed.

 

download section EC of the service manual and start reading on page 610. There is a trouble shooting guide that starts on page 613. You need to measure voltages, so I hope you have a voltmeter.

Section EC

 

Or you can view this



DTC P1564 ASCD STEERING SWITCH

Component Description



ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of switch, and determines which button is operated.

Refer to ASCD function.

Consult-II Reference Value In Data Monitor Mode

On Board Diagnosis Procedure
On Board Diagnosis Procedure
This self-diagnosis has the one trip detection logic. The MIL will not light up for this self-diagnosis.

NOTE: If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

With CONSULT-II

1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Wait at least 10 seconds .
4. Press "CRUISE" 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. Press "CANCEL" switch for at least 10 seconds , then release it and wait at least 10 seconds .
8. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
Follow the procedure "With CONSULT-II" above.

EC-ASC/SW-01

Wiring Diagram

Diagnostic Procedure Step 1
Diagnostic Procedure Step 2 - 5
Diagnostic Procedure Step 6 - 7
Diagnostic Procedure

Component Inspection

ASCD STEERING SWITCH

1. Disconnect ASCD steering switch.
2. Check continuity between terminals 1 and 2 by pushing each switch.

 

Thanks for the help guys....


I drove the car again today and now when I set the cruise control to On the SET light keeps flashing on and off so now I'm pretty sure it is the switch to the steering wheel and Cruise will not engage anymore. I'm going to order a new cruise control switch for the steering wheel. If that doesn't work I will follow the steps from above. One thing is I should probably disconnect the battery before replacing the switch on the steering wheel so the airbags don't go off huh..!? lol

 

anytime! Keep us posted if it solves the prob!

 

well I am incorrect then saying the steering wheel controls dont set a light, they dont on sentras or frontiers, interesting.

 

How can I get rid of this code if nothing on my steering wheel works at all. Even my horn isn't working

 

Its your speed sensor or cluster

 

but wouldn't it give me a different code if it was my speed sensor?

 

Maybe the problem is the clockspring in the steering wheel. The clockspring is the name of the wires that twist when you turn the steering wheel. You will have to check the wire continuity.