Infiniti QX56 (JA60). Manual - part 419

EC-328

< COMPONENT DIAGNOSIS >

[VK56DE]

P1564 ICC STEERING SWITCH

P1564 ICC STEERING SWITCH

Component Description

INFOID:0000000005149386

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 

CCS-13, "System Description"

 for the ICC function.

On Board Diagnosis Logic

INFOID:0000000005149387

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-286, "On Board Diagnosis Logic"

.

DTC Confirmation Procedure

INFOID:0000000005149388

1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.

Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.
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 sec-

onds.

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. Check DTC.
10. If DTC is detected, go to 

EC-328, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005149389

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body.

PBIB2640E

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
• Combination switch (spiral cable)
• ECM

P1564 ICC STEERING SWITCH

EC-329

< COMPONENT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Refer to 

EC-85, "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.

 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

BBIA0354E

Switch

Monitor item

Condition

Indication

MAIN switch

MAIN SW

Pressed

ON

Released

OFF

CANCEL switch

CANCEL SW

Pressed

ON

Released

OFF

RESUME/ACCELERATE 
switch

RESUME/ACC SW

Pressed

ON

Released

OFF

SET/COAST switch

SET SW

Pressed

ON

Released

OFF

DISTANCE switch

DIST SW

Pressed

ON

Released

OFF

Switch

Condition

Voltage [V]

MAIN switch

Pressed

Approx. 0

Released

Approx. 4.3

CANCEL switch

Pressed

Approx. 1.3

Released

Approx. 4.3

RESUME/ACCELERATE 
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

EC-330

< COMPONENT DIAGNOSIS >

[VK56DE]

P1564 ICC STEERING SWITCH

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 M102.

4. Check harness continuity between combination switch terminal 15 and ECM terminal 67.

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.

• Harness connectors M31, E152

• Harness connectors E5, F14

• 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.
OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors M31, E152

• 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-330, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace ICC steering switch.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-35, "How to Check Terminal"

 and 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005149390

ICC STEERING SWITCH

Continuity should exist.

Continuity should exist.

P1564 ICC STEERING SWITCH

EC-331

< COMPONENT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1. Disconnect combination switch (spiral cable) harness connector M102.
2. Check continuity between combination switch terminals 1 and 2

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

JMBIA0603ZZ