Infiniti QX56 (Z62). Manual - part 614

 

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Infiniti QX56 (Z62). Manual - part 614

 

 

EC-434

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1564 ICC STEERING SWITCH

P1564 ICC STEERING SWITCH

DTC Logic

INFOID:0000000006217938

DTC DETECTION LOGIC

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

EC-376, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 10 seconds.

2.

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

3.

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

4.

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

5.

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

6.

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

7.

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

8.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-434, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217939

1.

CHECK ICC STEERING SWITCH CIRCUIT

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector terminals under the following conditions.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1564

ASCD SW
(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

P1564 ICC STEERING SWITCH

EC-435

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

2.

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.

4.

Check the continuity between combination switch and ECM harness connector.

5.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

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

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

4.

CHECK ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between combination switch and ECM harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

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

ECM

Condition

Voltage (V)

Connector

+

–

Terminal

Terminal

E80

128

(ICC steering switch signal)

130

MAIN switch: Pressed

Approx. 0

DYNAMIC DRIVER ASSISTANCE switch: Pressed

Approx. 1.0

CANCEL switch: Pressed

Approx. 1.9

DISTANCE switch: Pressed

Approx. 2.6

SET/COAST switch: Pressed

Approx. 3.2

RESUME/ACCELERATE switch: Pressed

Approx. 3.7

All ICC steering switches: Released

Approx. 4.2

Combination switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

—

32

E80

130

Existed

Combination switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

—

25

E80

130

Existed

EC-436

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1564 ICC STEERING SWITCH

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

6.

CHECK ICC STEERING SWITCH

Refer to 

EC-436, "Component Inspection (ICC Steering Switch)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace ICC steering switch. Refer to 

ST-33, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ICC Steering Switch)

INFOID:0000000006217940

1.

CHECK ICC STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect combination switch (spiral cable) harness connector M302.

3.

Check resistance between combination switch harness connector terminals under the following condi-
tions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ICC steering switch. Refer to 

ST-33, "Removal and Installation"

.

Combination switch

Condition

Resistance (

Ω

)

Connector

Terminals

M302

13 and 16

MAIN switch: Pressed

Approx. 0

DYNAMIC DRIVER ASSISTANCE switch: Pressed

Approx. 270

CANCEL switch: Pressed

Approx. 620

DISTANCE switch: Pressed

Approx. 1,100

SET/COAST switch: Pressed

Approx. 1,810

RESUME/ACCELERATE switch: Pressed

Approx. 3,000

All ICC steering switches: Released

Approx. 5,420

P1568 ICC FUNCTION

EC-437

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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P1568 ICC FUNCTION

DTC Logic

INFOID:0000000006217941

DTC DETECTION LOGIC

NOTE:
• If DTC P1568 is displayed with DTC UXXXX, perform the trouble diagnosis for DTC UXXXX.
• If DTC P1568 is displayed with DTC P0605, perform the trouble diagnosis for DTC P0605. Refer to

EC-376, "DTC Logic"

.

• If DTC P1568 is displayed with DTC P0607, perform the trouble diagnosis for DTC P0607. Refer to

EC-378, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Step 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test
is expected to be easier, it is unnecessary to lift the vehicle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Press MAIN switch on ICC steering switch.

3.

Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION:

Always drive vehicle at a safe speed.

4.

Press SET/COAST switch.

5.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-437, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217942

1.

REPLACE ADAS CONTROL UNIT

1.

Replace ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

.

2.

Check DTC of  ADAS control unit. Refer to 

DAS-38, "DTC Index"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC Detecting Condition

Possible Cause

P1568

ICC COMMAND VALUE
(ICC function)

ECM detects a difference between signals 
from ADAS control unit is out of specified 
range.

• Harness or connectors

(The CAN communication line is open or 
shorted.)

• ADAS control unit
• ECM

 

 

 

 

 

 

 

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