Infiniti G35 (V35). Manual - part 415

DTC P1564 ASCD STEERING SWITCH

EC-541

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DTC P1564 ASCD STEERING SWITCH

PFP:25551

Component Description

NBS000ZQ

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 

EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"

  for the ASCD function.

CONSULT-II Reference Value in Data Monitor Mode

NBS000ZR

Specification data are reference values.

PBIB2766E

MONITOR ITEM

CONDITION

SPECIFICATION

MAIN SW

●

Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

CANCEL SW

●

Ignition switch: ON

CANCEL switch: Pressed

ON

CANCEL switch: Released

OFF

RESUME/ACC SW

●

Ignition switch: ON

RESUME/ACCELERATE switch: 
Pressed

ON

RESUME/ACCELERATE switch: 
Released

OFF

SET SW

●

Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

EC-542

DTC P1564 ASCD STEERING SWITCH

On Board Diagnosis Logic

NBS000ZS

●

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.
Refer to 

EC-496, "DTC P0605 ECM"

.

DTC Confirmation Procedure

NBS000ZT

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 MAIN switch for at least 10 seconds, then release it and
wait at least 10 seconds.

5.

Press CANCEL switch for at least 10 seconds, then release it
and wait at least 10 seconds.

6.

Press RESUME/ACCELERATE switch for at least 10 seconds,
then release it and wait at least 10 seconds.

7.

Press SET/COAST switch for at least 10 seconds, then release
it and wait at least 10 seconds.

8.

If DTC is detected, go to 

EC-545, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC No.

Trouble Diagnosis 

Name

DTC Detecting Condition

Possible Cause

P1564
1564

ASCD steering 
switch

●

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
(The switch circuit is open or shorted.)

●

ASCD steering switch

●

ECM

SEF058Y

DTC P1564 ASCD STEERING SWITCH

EC-543

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Wiring Diagram

NBS000ZU

TBWM0825E

EC-544

DTC P1564 ASCD STEERING SWITCH

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

67

B/W

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

99

G/Y

ASCD steering switch

[Ignition switch: ON]

●

ASCD steering switch: OFF

Approximately 4V

[Ignition switch: ON]

●

MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

●

CANCEL switch: Pressed

Approximately 1V

[Ignition switch: ON]

●

RESUME/ACCELERATE switch: Pressed

Approximately 3V

[Ignition switch: ON]

●

SET/COAST switch: Pressed

Approximately 2V