Nissan Frontier D40. Manual - part 407

 

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Nissan Frontier D40. Manual - part 407

 

 

P1564 ASCD STEERING SWITCH

EC-319

< COMPONENT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Refer to 

EC-90, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK ASCD STEERING SWITCH CIRCUIT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SW”, “RESUME/ACC SW”, “SET SW and “CANCEL 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

OK

>> GO TO 8.

NG

>> GO TO 3.

3.

CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect combination switch harness connector M102.

BBIA0614E

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

Switch

Condition

Voltage [V]

MAIN switch

Pressed

Approx. 0

Released

Approx. 4.0

CANCEL switch

Pressed

Approx. 1.0

Released

Approx. 4.0

RESUME/ACCELERATE 
switch

Pressed

Approx. 3.0

Released

Approx. 4.0

SET/COAST switch

Pressed

Approx. 2.0

Released

Approx. 4.0

PBIB0311E

EC-320

< COMPONENT DIAGNOSIS >

[QR25DE]

P1564 ASCD STEERING SWITCH

3.

Disconnect ECM harness connector.

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
• 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.

5.

CHECK ASCD 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.
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch
• Harness connectors M31, E152

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

7.

CHECK ASCD STEERING SWITCH

Refer to 

EC-320, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace ASCD steering switch.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-46, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005273348

ASCD STEERING SWITCH

1.

Disconnect combination switch (spiral cable) harness connector M102.

Continuity should exist.

Continuity should exist.

P1564 ASCD STEERING SWITCH

EC-321

< COMPONENT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

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

If NG, replace ASCD steering switch.

Switch

Condition

Resistance [

]

MAIN switch

Pressed

Approx. 0

Released

Approx. 4,000

CANCEL switch

Pressed

Approx. 250

Released

Approx. 4,000

RESUME/ACCELERATE 
switch

Pressed

Approx. 1,480

Released

Approx. 4,000

SET SW/COAST switch

Pressed

Approx. 660

Released

Approx. 4,000

JMBIA1066GB

EC-322

< COMPONENT DIAGNOSIS >

[QR25DE]

P1572 ASCD BRAKE SWITCH

P1572 ASCD BRAKE SWITCH

Component Description

INFOID:0000000005273349

When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by those two types of input (ON/OFF signal).
Refer to 

CCS-2

 for the ASCD function.

On Board Diagnosis Logic

INFOID:0000000005273350

This self-diagnosis has the one trip detection logic.
The MIL will not light up for this self-diagnosis.
NOTE:
• If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

to 

EC-281

.

• This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not

stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch OFF. And even when malfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.

DTC Confirmation Procedure

INFOID:0000000005273351

CAUTION:

Always drive vehicle at a safe speed.
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.

• The procedure for malfunction B is not described. It takes an extremely long time to complete the procedure

for malfunction B. By performing the procedure for malfunction A, the condition that causes malfunction B
can be detected. 

TESTING CONDITION:
Steps 4 and 7 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.

 WITH CONSULT-III

1.

Start engine.

2.

Select “DATA MONITOR” mode with CONSULT-III.

BBIA0560E

DTC No.

Trouble diagnosis name

DTC Detecting Condition

Possible Cause

P1572
1572

ASCD brake switch

A)

• When the vehicle speed is above 

30km/h (19 MPH), ON signals from 
the stop lamp switch and the ASCD 
brake switch are sent to ECM at the 
same time.

• Harness or connectors

(The stop lamp switch circuit is shorted.)

• Harness or connectors

(The ASCD brake switch circuit is shorted.)

• Harness or connectors

(The ASCD clutch switch circuit is shorted.) 
(M/T models)

• Stop lamp switch
• ASCD brake switch
• ASCD clutch switch (M/T models)
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• Incorrect ASCD clutch switch installation

(M/T models)

• ECM

B)

• ASCD brake switch signal is not sent 

to ECM for extremely long time while 
the vehicle is driving

 

 

 

 

 

 

 

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