Nissan Frontier D40. Manual — part 409
P1572 ASCD BRAKE SWITCH
EC-327
< COMPONENT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 10.
3.
CHECK ASCD BRAKE SWITCH CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ASCD clutch switch harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between ASCD clutch switch terminal 1 and
ground under the following conditions with CONSULT-III or
tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 4.
4.
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 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
BBIA0624E
CONDITION
VOLTAGE
Brake pedal: Fully released
Battery voltage
Brake pedal: Slightly depressed
Approx. 0V
PBIB0799E
BBIA0560E
Voltage: Battery voltage
PBIB0857E
EC-328
< COMPONENT DIAGNOSIS >
[QR25DE]
P1572 ASCD BRAKE SWITCH
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, short to ground or short to power in harness or connectors.
6.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between ASCD brake switch terminal 2 and ASCD clutch switch terminal 1.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
7.
CHECK ASCD BRAKE SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 14.
NG
>> Replace ASCD brake switch.
8.
CHECK ASCD CLUTCH 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 clutch switch terminal 2.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK ASCD CLUTCH SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 14.
NG
>> Replace ASCD clutch switch.
10.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
Continuity should exist.
Continuity should exist.
BBIA0560E
P1572 ASCD BRAKE SWITCH
EC-329
< COMPONENT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3.
Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-III or tester.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
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 fuse
>> Repair open circuit, short to ground or short to power in harness or connectors.
12.
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 13.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
13.
CHECK STOP LAMP SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 14.
NG
>> Replace stop lamp switch.
14.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005273353
ASCD BRAKE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
Voltage: Battery voltage
PBIB0117E
Continuity should exist.
EC-330
< COMPONENT DIAGNOSIS >
[QR25DE]
P1572 ASCD BRAKE SWITCH
3.
Check continuity between ASCD brake switch terminals 1 and 2
under the following conditions.
If NG, adjust ASCD brake switch installation, refer to
, and
perform step 3 again.
ASCD CLUTCH SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ASCD clutch switch harness connector.
3.
Check continuity between ASCD clutch switch terminals 1 and 2
under the following conditions.
If NG, adjust ASCD clutch switch installation, refer to
Vehicle Inspection and Adjustment"
, and perform step 3 again.
STOP LAMP SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check continuity between stop lamp switch terminals 1 and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to
, and perform step 3 again.
Condition
Continuity
Brake pedal: Fully released
Should exist
Brake pedal: Slightly depressed
Should not exist
SEC023D
Condition
Continuity
Clutch pedal: Fully released
Should exist
Clutch pedal: Slightly depressed
Should not exist
SEC024D
Condition
Continuity
Brake pedal: Fully released
Should not exist
Brake pedal: Slightly depressed
Should exist
PBIB2285E
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