Nissan Altima L32. Instruction — part 574
P1572 ASCD BRAKE SWITCH
EC-1417
< COMPONENT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
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
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
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
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]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
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