Nissan Altima L32. Manual - part 574

P1572 ASCD BRAKE SWITCH

EC-1417

< COMPONENT DIAGNOSIS >

[VQ35DE]

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1. Turn ignition switch OFF.

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

connector.

Is the inspection result normal?

YES

>> GO TO 11.

NO

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

11.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-1418, "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 ASCD clutch 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 14.

NO

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connectors E45, E46

• Joint connector-E06 E27

• Harness for open or short between ASCD clutch switch and ECM

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

14.

CHECK ASCD CLUTCH SWITCH

Refer to 

EC-1419, "Component Inspection (ASCD Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace ASCD clutch switch.

15.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

ASCD brake switch

ASCD clutch switch

Continuity

Connector

Terminal

Connector

Terminal

E37

2

E39

1

Existed

ASCD clutch switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E39

2

E10

110

Existed

EC-1418

< COMPONENT DIAGNOSIS >

[VQ35DE]

P1572 ASCD BRAKE SWITCH

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

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> GO TO 16.

16.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 10 A fuse (No. 7)

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

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

17.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.

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

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

YES

>> GO TO 18.

NO

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

18.

CHECK STOP LAMP SWITCH

Refer to 

EC-1420, "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:0000000004362280

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

PBIB3443E

Stop lamp switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E38

2

E10

106

Existed

P1572 ASCD BRAKE SWITCH

EC-1419

< COMPONENT DIAGNOSIS >

[VQ35DE]

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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:0000000004455896

1.

CHECK ASCD CLUTCH SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect ASCD clutch switch harness connector.

3. Check harness continuity between ASCD clutch switch termi-

nals 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 harness continuity between ASCD clutch switch termi-

nals 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

EC-1420

< COMPONENT DIAGNOSIS >

[VQ35DE]

P1572 ASCD BRAKE SWITCH

Component Inspection (Stop Lamp Switch)

INFOID:0000000004362281

1.

CHECK STOP LAMP SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check harness continuity between stop lamp switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK STOP LAMP SWITCH-II

1. Adjust stop lamp switch installation. Refer to 

BR-13, "Inspection and Adjustment"

.

2. Check harness continuity between stop lamp switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

PBIB3444E

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

PBIB3444E