Nissan Altima L32. Manual - part 319

 

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Nissan Altima L32. Manual - part 319

 

 

P1572 ASCD BRAKE SWITCH

EC-397

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 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-399, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace ASCD brake switch.

7.

CHECK ASCD BRAKE SWITCH 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 con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 8.

8.

CHECK ASCD BRAKE SWITCH POWER SUPPLY 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 con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• Junction block connector E44, E46

• 10A fuse (No.3)

• 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.

ASCD brake switch

ECM

Continuity

Connector Terminal Connector Terminal

E37

2

E10

110

Existed

ASCD clutch switch

Ground

Condition

Voltage (V)

Connector

Terminal

E39

1

Ground

Brake 
pedal

Slightly de-
pressed

Approx. 0

Fully released

Battery voltage

PBIB0857E

ASCD brake switch

Ground

Voltage

Connector Terminal

E37

1

Ground Battery voltage

PBIB0857E

EC-398

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P1572 ASCD BRAKE SWITCH

10.

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 ASCD brake switch harness connector and ASCD clutch switch harness

connector.

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES 

>> GO TO 11.

NO

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

11.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-399, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace ASCD brake switch.

12.

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 clutch switch harness connector.

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES 

>> GO TO 13.

NO

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

13.

CHECK ASCD CLUTCH SWITCH

Refer to 

EC-400, "Component Inspection (ASCD Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace ASCD clutch switch.

14.

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.

ASCD brake switch

ASCD clutch switch

Continuity

Connector Terminal Connector Terminal

E37

2

E39

1

Existed

ECM

ASCD clutch switch

Continuity

Connector Terminal Connector Terminal

E10

110

E37

2

Existed

PBIB3443E

P1572 ASCD BRAKE SWITCH

EC-399

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> GO TO 15.

15.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 10A fuse (No.7)

• 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.

16.

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 18.

NO

>> GO TO 17.

17.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 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.

18.

CHECK STOP LAMP SWITCH

Refer to 

EC-401, "Component Inspection (Stop Lamp Switch)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace stop lamp switch.

19.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000004349446

1.

CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

Stop lamp switch

Ground

Voltage

Connector Terminal

E38

1

Ground Battery voltage

ECM

ASCD clutch switch

Continuity

Connector Terminal Connector Terminal

E10

106

E38

2

Existed

EC-400

< COMPONENT DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

P1572 ASCD BRAKE SWITCH

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-13, "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:0000000004349447

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 

BR-13, "Inspection and Adjustment"

.

2. Check the continuity between ASCD clutch switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD clutch switch.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed Not existed

SEC023D

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed Not existed

SEC023D

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed Not existed

SEC023D

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed Not existed

SEC023D

 

 

 

 

 

 

 

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