Infiniti FX35 / FX45. Manual - part 572

DTC P1564 ICC STEERING SWITCH

EC-1049

< SERVICE INFORMATION >

[VK45DE]

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Wiring Diagram

INFOID:0000000001326922

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.

TBWM0724E

EC-1050

< SERVICE INFORMATION >

[VK45DE]

DTC P1564 ICC STEERING SWITCH

Diagnosis Procedure

INFOID:0000000001326923

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-723, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK ICC STEERING SWITCH CIRCUIT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW”, “SET SW” and “DIST SW” in “DATA MONITOR”
mode with CONSULT-III.

3.

Check each item indication under the following conditions.

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

82

B/W

Sensor ground

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

99

G/Y

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

PBIB2195E

Switch

Monitor item

Condition

Indication

MAIN switch

MAIN SW

Pressed

ON

Released

OFF

CANCEL switch

CANCEL SW

Pressed

ON

Released

OFF

RESUME/ACCEL-
ERATE switch

RESUME/ACC SW

Pressed

ON

Released

OFF

DTC P1564 ICC STEERING SWITCH

EC-1051

< SERVICE INFORMATION >

[VK45DE]

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 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check voltage between ECM terminal 99 and ground with press-
ing each button.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 3.

3.

CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect combination switch harness connector M203.

4.

Check harness continuity between combination switch terminal 15 and ECM terminal 82.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 99 and combination switch terminal 14.
Refer to Wiring Diagram.

2.

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

SET/COAST switch

SET SW

Pressed

ON

Released

OFF

DISTANCE switch

DIST SW

Pressed

ON

Released

OFF

Switch

Monitor item

Condition

Indication

Switch

Condition

Voltage [V]

MAIN switch

Pressed

Approx. 0

Released

Approx. 4.3

CANCEL switch

Pressed

Approx. 1.3

Released

Approx. 4.3

RESUME/ACCELER-
ATE switch

Pressed

Approx. 3.7

Released

Approx. 4.3

SET/COAST switch

Pressed

Approx. 3.0

Released

Approx. 4.3

DISTANCE switch

Pressed

Approx. 2.2

Released

Approx. 4.3

PBIB0311E

Continuity should exist.

Continuity should exist.

EC-1052

< SERVICE INFORMATION >

[VK45DE]

DTC P1564 ICC STEERING SWITCH

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK ICC STEERING SWITCH

Refer to 

EC-1052, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace ICC steering switch.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

Component Inspection

INFOID:0000000001326924

ICC STEERING SWITCH

1.

Disconnect combination switch (spiral cable) harness connector M203.

2.

Check continuity between combination switch terminals 14 and
15 with pushing each switch.

If NG, replace ICC steering switch.

Switch

Condition

Resistance [

Ω

]

MAIN switch

Pressed

Approx. 0

Released

Approx. 5,500

CANCEL switch

Pressed

Approx. 310

Released

Approx. 5,500

RESUME/ACCELERATE 
switch

Pressed

Approx. 2,600

Released

Approx. 5,500

SET/COAST switch

Pressed

Approx. 1,400

Released

Approx. 5,500

DISTANCE switch

Pressed

Approx. 740

Released

Approx. 5,500

PBIB0967E