Infiniti G37 Coupe. Manual — part 560

P1564 ASCD STEERING SWITCH

EC-421

< COMPONENT DIAGNOSIS >

[VQ37VHR]

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P1564 ASCD STEERING SWITCH

Description

INFOID:0000000001734243

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-62, "System Description"

for the ASCD function.

DTC Logic

INFOID:0000000001734244

DTC DETECTION LOGIC

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

EC-356, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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.

Check DTC.

Is DTC detected?

YES

>> Go to

EC-421, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001734245

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK ASCD STEERING SWITCH CIRCUIT

With CONSULT-III

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

P1564

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

EC-422

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1564 ASCD STEERING SWITCH

1.

Turn ignition switch ON.

2.

Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET 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 the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 3.

3.

CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect combination switch harness connector M303.

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 5.

NO

>> 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 ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between combination switch and ECM harness connector.

Monitor item

Condition

Indication

MAIN SW

MAIN switch

Pressed

ON

Released

OFF

CANCEL SW

CANCEL switch

Pressed

ON

Released

OFF

RESUME/ACC SW

RESUME/ACCEL-
ERATE switch

Pressed

ON

Released

OFF

SET SW

SET/COAST switch

Pressed

ON

Released

OFF

ECM

Ground

Condition

Voltage

Connector

Terminal

M107

101

(ASCD steering switch signal)

Ground

MAIN switch: Pressed

Approx. 0V

CANCEL switch: Pressed

Approx. 1V

SET/COAST switch: Pressed

Approx. 2V

RESUME/ACCELERATE switch: Pressed

Approx. 3V

All ASCD steering switches: Released

Approx. 4V

Combination switch

ECM

Continuity

Terminal

Connector

Terminal

16

M107

108

Existed

P1564 ASCD STEERING SWITCH

EC-423

< COMPONENT DIAGNOSIS >

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2.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> 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 ASCD STEERING SWITCH

Refer to

EC-423, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace ASCD steering switch.

8.

CHECK INTERMITTENT INCIDENT

Refer to

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001734246

1.

CHECK ASCD STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect combination switch (spiral cable) harness connector M303.

3.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD steering switch

Combination switch

ECM

Continuity

Terminal

Connector

Terminal

13

M107

101

Existed

Combination switch

Condition

Resistance

Connector

Terminals

M303

13 and 16

MAIN switch: Pressed

Approx. 0

Ω

CANCEL switch: Pressed

Approx. 250

Ω

SET/COAST switch: Pressed

Approx. 660

Ω

RESUME/ACCELERATE switch: Pressed

Approx. 1,480

Ω

All ASCD steering switches: Released

Approx. 4,000

Ω

EC-424

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1564 ICC STEERING SWITCH

P1564 ICC STEERING SWITCH

Description

INFOID:0000000001734247

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-15, "System Description"

for the ICC function.

DTC Logic

INFOID:0000000001734248

DTC DETECTION LOGIC

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

EC-356, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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.

Check DTC.

Is DTC detected?

YES

>> Go to

EC-424, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001734249

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK ICC STEERING SWITCH CIRCUIT

With CONSULT-III

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

P1564

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