Nissan Qashqai (2007-2010). Manual — part 187

P1572 ASCD BRAKE SWITCH

EC-267

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

5.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?

YES

>> Go to

EC-267, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

With CONSULT-III

1.

Drive the vehicle for at least 5 consecutive seconds under the following conditions.

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
This procedure 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.

2.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

YES

>> Go to

EC-267, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001116266

1.

CHECK OVERALL FUNCTION-I

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3.

Check “BRAKE SW1” 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 2.

VHCL SPEED SE

More than 30 km/h (19 mph)

Shift lever

Suitable position

VHCL SPEED SE

More than 30 km/h (19 mph)

Selector lever

Suitable position

Driving location

Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal and clutch pedal

Slightly depressed

OFF

Fully released

ON

ECM

Ground

Condition

Voltage

Connector

Terminal

E16

100

(ASCD brake switch signal)

Ground

Brake pedal and clutch pedal

Slightly depressed

Approx. 0V

Fully released

Battery voltage

EC-268

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

P1572 ASCD BRAKE SWITCH

NO

>> GO TO 3.

2.

CHECK ASCD BRAKE SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ASCD brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 3.

3.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ASCD clutch switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ASCD clutch switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Junction block connector E105, M77
• 10A fuse (No.4)
• Harness for open or short between ASCD brake switch and fuse

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

5.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between ASCD brake switch harness connector and ASCD clutch switch harness
connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK ASCD BRAKE SWITCH

Refer to

EC-270, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 14.

ASCD Clutch switch

Ground

Condition

Voltage (V)

Connector

Terminal

E112

1

Ground

Clutch pedal

Slightly depressed

Approx. 0

Fully released

Battery voltage

ASCD clutch switch

Ground

Voltage

Connector

Terminal

E111

1

Ground

Battery voltage

ASCD brake switch

ASCD clutch switch

Continuity

Connector

Terminal

Connector

Terminal

E112

1

E111

2

Existed

P1572 ASCD BRAKE SWITCH

EC-269

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> Replace ASCD brake switch.

7.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ECM harness connector and ASCD brake switch harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 8.

NO

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

8.

CHECK ASCD CLUTCH SWITCH

Refer to

EC-270, "Component Inspection (ASCD Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace ASCD clutch switch.

9.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check the voltage between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

Check the following.
• 10A fuse (No.11)
• Harness for open or short between stop lamp switch and battery

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

11.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between ECM harness connector and stop lamp switch harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 13.

NG

>> GO TO 12.

12.

DETECT MALFUNCTIONING PART

Check the following.

ECM

ASCD brake switch

Continuity

Connector

Terminal

Connector

Terminal

E16

100

E112

2

Existed

Stop lamp switch

Ground

Voltage

Connector

Terminal

E114 1

Ground

Battery

voltage

ECM

Stop lamp switch

Continuity

Connector

Terminal

Connector

Terminal

E10

106

E114

2

Existed

EC-270

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

P1572 ASCD BRAKE SWITCH

• Harness for open or short between ECM and stop lamp switch

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

13.

CHECK STOP LAMP SWITCH

Refer to

EC-271, "Component Inspection (Stop Lamp Switch)"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace stop lamp switch.

14.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000001116267

1.

CHECK ASCD BRAKE SWITCH-I

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH-II

1.

Adjust ASCD brake switch installation. Refer to

BR-18, "Inspection and Adjustment"

.

2.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD brake switch.

Component Inspection (ASCD Clutch Switch)

INFOID:0000000001116268

1.

CHECK ASCD CLUTCH SWITCH-I

1.

Turn ignition switch OFF.

2.

Disconnect ASCD clutch switch harness connector.

3.

Check the continuity between ASCD clutch switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed