Nissan Qashqai (2007-2010). Manual - part 341
P1572 ASCD BRAKE SWITCH
EC-883
< COMPONENT DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
EC-888, "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 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 12.
NO
>> GO TO 8.
8.
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 10.
NO
>> GO TO 9.
9.
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.
10.
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?
ASCD Clutch switch
Ground
Condition
Voltage (V)
Connector
Terminal
E112
1
Ground
Clutch ped-
al
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