Nissan Qashqai (2007-2010). Manual — part 258

ASCD BRAKE SWITCH

EC-551

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ASCD BRAKE SWITCH

Description

INFOID:0000000001096955

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 this input of two kinds (ON/OFF signal).
Refer to

EC-399, "System Description"

for the ASCD function.

Component Function Check

INFOID:0000000001096956

1.

CHECK FOR ASCD BRAKE SWITCH FUNCTION

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

>> INSPECTION END.

NO

>> Go to

EC-553, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001096957

1.

CHECK ASCD BRAKE SWITCH CIRCUIT - I

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.

5.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT - II

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.

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

ASCD clutch switch

Ground

Voltage (V)

Connector

Terminal

E112

1

Ground

Battery voltage

EC-552

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

ASCD BRAKE SWITCH

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness or connectors 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.

4.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

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 5.

NO

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

5.

CHECK ASCD CLUTCH SWITCH

Refer to

EC-555, "Component Inspection (ASCD Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace ASCD clutch switch.

6.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector

3.

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

4.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK ASCD BRAKE SWITCH

Refer to

EC-555, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace ASCD brake switch.

ASCD clutch switch

Ground

Voltage (V)

Connector

Terminal

E111

1

Ground

Battery voltage

ASCD brake switch

ASCD clutch switch

Continuity

Connector

Terminal

Connector

Terminal

E112

1

E111

2

Existed

ASCD brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E112

2

E16

100

Existed

ASCD BRAKE SWITCH

EC-553

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

8.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000001096958

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-17, "Removal and Installation"

(LHD) or

BR-61,

"Removal and Installation"

(RHD).

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:0000000001096959

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.

2.

CHECK ASCD CLUTCH SWITCH-II

1.

Adjust ASCD clutch switch installation. Refer to

CL-8, "Removal and Installation"

.

2.

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

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

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed

EC-554

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

ASCD BRAKE SWITCH

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD clutch switch.