Nissan Qashqai (2007-2010). Manual — part 405
P1572 ASCD BRAKE SWITCH
EC-1139
< COMPONENT DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
5.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1144, "Diagnosis Procedure"
.
NO
>> GO TO 4.
4.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
With CONSULT-III
1.
Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1144, "Diagnosis Procedure"
.
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform component check. Refer to
EC-1143, "Component Function Check"
Use component function check to check the overall function of the ASCD brake circuit. During this check, a 1st
trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1144, "Diagnosis Procedure"
.
Component Function Check
INFOID:0000000001116275
1.
PERFORM COMPONENT FUNCTION CHECK-I
Without CONSSULT-III
1.
Turn ignition switch ON.
2.
Check voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
VHCL SPEED SE
More than 30 km/h (19 mph)
Shift lever
Suitable position
VHCL SPEED SE
More than 30 km/h (19 mph)
Selector lever
Suitable position
Driving location
Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.
ECM
Ground
Condition
Voltage
Connector
Terminal
E16
100
(ASCD brake switch signal)
Ground
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
Approx. 0V
Fully released
Battery voltage
EC-1140
< COMPONENT DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
P1572 ASCD BRAKE SWITCH
2.
PERFORM COMPONENT FUNCTION CHECK-II
Without CONSSULT-III
Check voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000001116083
1.
CHECK OVERALL FUNCTION-I
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
>> GO TO 2.
NO-1
>> CVT models: GO TO 3.
NO-1
>> M/T models: GO TO 7.
2.
CHECK OVERALL FUNCTION-II
With CONSULT-III
Select “BRAKE SW2” and check indication in “DATA MONITOR” mode.
Without CONSULT-III
Check the voltage between ECM harness connector and ground.
ECM
Ground
Condition
Voltage
Connector
Terminal
E16
99
(Stop lamp switch signal)
Ground
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
Approx. 0V
Fully released
Battery voltage
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
OFF
Fully released
ON
ECM
Ground
Condition
Voltage
Connector
Terminal
E16
100
(ASCD brake switch signal)
Ground
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
Approx. 0V
Fully released
Battery voltage
Monitor item
Condition
Indication
BRAKE SW2
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
ON
Fully released
OFF
P1572 ASCD BRAKE SWITCH
EC-1141
< COMPONENT DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 19.
NO
>> GO TO 14.
3.
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 connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
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.
5.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM ASCD 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 6.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK ASCD BRAKE SWITCH
EC-1148, "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.
ECM
Ground
Condition
Voltage
Connector
Terminal
E16
99
(Stop lamp switch signal)
Ground
Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)
Slightly depressed
Approx. 0V
Fully released
Battery voltage
ASCD brake switch
Ground
Voltage
Connector
Terminal
E112
1
Ground
Battery voltage
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E112
2
E16
100
Existed
EC-1142
< COMPONENT DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
P1572 ASCD BRAKE SWITCH
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?
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
EC-888, "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 brake switch harness connector.
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
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