Infiniti Q45. Manual - part 485

DTC P1564 ICC STEERING SWITCH

EC-579

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DTC P1564 ICC STEERING SWITCH

PFP:25551

Component Description

NBS0023V

ICC 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 

ACS-6, "DESCRIPTION"

  for the ICC function.

CONSULT-II Reference Value in Data Monitor Mode

NBS0023W

Specification data are reference values.

On Board Diagnosis Logic

NBS0023X

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

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

EC-489

 .

PBIB2434E

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

DIST SW

●

Ignition switch: ON

DISTANCE switch: Pressed

ON

DISTANCE switch: Released

OFF

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1564
1564

ICC steering switch

●

An excessively high voltage signal from the 
ICC steering switch is sent to ECM.

●

ECM detects that input signal from the ICC 
steering switch is out of the specified range.

●

ECM detects that the ICC steering switch is 
stuck ON.

●

Harness or connectors
(The switch circuit is open or shorted.)

●

ICC steering switch

●

ECM

EC-580

DTC P1564 ICC STEERING SWITCH

DTC Confirmation Procedure

NBS0023Y

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.

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

9.

If DTC is detected, go to 

EC-582, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y

DTC P1564 ICC STEERING SWITCH

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Wiring Diagram

NBS0023Z

TBWM1245E

EC-582

DTC P1564 ICC 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.

Diagnostic Procedure

NBS00240

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body.
Refer to 

EC-154, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

67

B

Sensor ground
(MAF sensor, IAT sensor, 
ECT sensor, FTT sensor, 
EVAP control system pres-
sure sensor, PSP sensor, 
ICC steering switch, Refrig-
erant pressure sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

99

G/OR

ICC steering switch

[Ignition switch: ON]

●

ICC steering switch: OFF

Approximately 4.3V

[Ignition switch: ON]

●

MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

●

CANCEL switch: Pressed

Approximately 1.3V

[Ignition switch: ON]

●

RESUME/ACCELERATE switch: Pressed

Approximately 3.7V

[Ignition switch: ON]

●

SET/COAST switch: Pressed

Approximately 3V

[Ignition switch: ON]

●

DISTANCE switch: Pressed

Approximately 2.2V

PBIB2417E