Nissan Frontier D40. Manual — part 408
P1572 ASCD BRAKE SWITCH
EC-323
< COMPONENT DIAGNOSIS >
[QR25DE]
C
D
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F
G
H
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J
K
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M
A
EC
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3.
Press MAIN switch and make sure that CRUISE indicator lights up.
4.
Drive the vehicle for at least 5 consecutive seconds under the following condition.
5.
Check DTC.
6.
If DTC is detected, go to
.
If DTC is not detected, go to the following steps.
7.
Drive the vehicle for at least 5 consecutive seconds under the following condition.
8.
Check DTC.
9.
If DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis Procedure
INFOID:0000000005273352
A/T MODELS
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 voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
VHCL SPEED SE
More than 30 km/h (19 MPH)
Shift lever
Suitable position
VHCL SPEED SE
More than 30 km/h (19 MPH)
Shift lever
Suitable position
Driving location
Depress the brake pedal for more than 5
seconds so as not to come off from the
above-mentioned vehicle speed.
CONDITION
INDICATION
Brake pedal: Slightly depressed
OFF
Brake pedal: Fully released
ON
CONDITION
VOLTAGE
Brake pedal: Slightly depressed
Approximately 0V
Brake pedal: Fully released
Battery voltage
MBIB0061E
EC-324
< COMPONENT DIAGNOSIS >
[QR25DE]
P1572 ASCD BRAKE SWITCH
Without CONSULT-III
Check voltage between ECM terminal 101 and ground under the following conditions.
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 7.
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 voltage between ASCD brake switch terminal 1 and
ground with CONSULT-III or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E160
• 10A fuse (No.12)
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.
Refer to Wiring Diagram.
CONDITION
INDICATION
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
CONDITION
VOLTAGE
Brake pedal: Fully released
Approximately 0V
Brake pedal: Slightly depressed
Battery voltage
MBIB0060E
BBIA0560E
Voltage: Battery voltage
PBIB0857E
P1572 ASCD BRAKE SWITCH
EC-325
< COMPONENT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK ASCD BRAKE SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace ASCD brake switch.
7.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-III or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E160
• 10A fuse (No.20)
• 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.
9.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 10.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
Continuity should exist.
BBIA0560E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
EC-326
< COMPONENT DIAGNOSIS >
[QR25DE]
P1572 ASCD BRAKE SWITCH
10.
CHECK STOP LAMP SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace stop lamp switch.
11.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
>> INSPECTION END
M/T MODELS
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 voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-III
Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.
CONDITION
INDICATION
Brake pedal and/or clutch pedal: Slightly depressed
OFF
Brake pedal and clutch pedal: Fully released
ON
CONDITION
VOLTAGE
Brake pedal and/or clutch pedal: Slightly depressed
Approximately 0V
Brake pedal and clutch pedal: Fully released
Battery voltage
MBIB0061E
CONDITION
INDICATION
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
CONDITION
VOLTAGE
Brake pedal: Fully released
Approximately 0V
Brake pedal: Slightly depressed
Battery voltage
PBIB1677E
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