Nissan Pathfinder (2011 year). Instruction — part 351
EC-862
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P1564 ASCD STEERING SWITCH
2. Check continuity between combination switch (spiral cable) ter-
minals 14 and 15 with pushing each switch.
Switch
Condition
Resistance [
Ω
]
MAIN switch
Pressed
Approx. 0
Released
Approx. 4,000
CANCEL switch
Pressed
Approx. 250
Released
Approx. 4,000
RESUME/ACCELERATE
switch
Pressed
Approx. 1,480
Released
Approx. 4,000
SET/COAST switch
Pressed
Approx. 660
Released
Approx. 4,000
PBIB0967E
2011 Pathfinder
P1572 ASCD BRAKE SWITCH
EC-863
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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P1572 ASCD BRAKE SWITCH
Component Description
INFOID:0000000006244547
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by two kinds of input (ON/OFF signal).
On Board Diagnosis Logic
INFOID:0000000006244548
•
This self-diagnosis has the one trip detection logic.
•
The MIL will not illuminate for this self-diagnosis.
NOTE:
•
If DTC P 1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
EC-817, "DTC Confirmation Procedure"
.
•
This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch is turned OFF. And even when malfunction A is detected
in two consecutive trips, DTC is not stored in ECM memory.
DTC Confirmation Procedure
INFOID:0000000006244549
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
• Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for
malfunction B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Steps 3 and 5 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.
1. Start engine (VDC switch OFF).
2. Press MAIN switch and check that CRUISE indicator illuminates.
3. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
BBIA0560E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1572
1572
ASCD brake switch
A)
When the vehicle speed is above 30km/
h (19 MPH), ON signals from the stop
lamp switch and the ASCD brake switch
are sent to ECM at the same time.
• Harness or connectors
(The stop lamp switch circuit is shorted.)
• Harness or connectors
(The ASCD brake switch circuit is shorted.)
• Stop lamp switch
• ASCD brake switch
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• ECM
B)
ASCD brake switch signal is not sent to
ECM for extremely long time while the
vehicle is being driven.
2011 Pathfinder
EC-864
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P1572 ASCD BRAKE SWITCH
4. Check 1st trip DTC.
If 1st trip DTC is detected, go to
If 1st trip DTC is not detected, go to the following step.
5. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000006244550
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 following conditions.
Vehicle speed
More than 30 km/h (19 MPH)
Selector lever
Suitable position
Vehicle speed
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 condition.
CONDITION
INDICATION
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
CONDITION
VOLTAGE
Brake pedal: Fully released
Battery voltage
Brake pedal: Slightly depressed
Approximately 0V
MBIB0061E
CONDITION
INDICATION
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
2011 Pathfinder
P1572 ASCD BRAKE SWITCH
EC-865
< DTC/CIRCUIT DIAGNOSIS >
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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
• 10 A fuse (No. 12)
• 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 harness connector.
3. Check harness continuity between ECM terminal 108 and ASCD brake 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 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
CONDITION
VOLTAGE
Brake pedal: Fully released
Approximately 0V
Brake pedal: Slightly depressed
Battery voltage
PBIB1537E
BBIA0560E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
2011 Pathfinder
EC-866
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P1572 ASCD BRAKE SWITCH
6.
CHECK ASCD BRAKE SWITCH
EC-867, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace ASCD brake switch. Refer to
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
• 10 A fuse (No.20)
• Harness for open or short between stop lamp switch and battery
>> Repair open circuit or 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 or short to ground or short to power in harness or connectors.
10.
CHECK STOP LAMP SWITCH
EC-867, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace stop lamp switch. Refer to
BBIA0560E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
2011 Pathfinder
P1572 ASCD BRAKE SWITCH
EC-867
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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11.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000006244551
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check harness 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.
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness 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
Brake pedal: Fully released
Should not exist.
Brake pedal: Slightly depressed
Should exist.
PBIB1185E
2011 Pathfinder
EC-868
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P1805 BRAKE SWITCH
P1805 BRAKE SWITCH
Description
INFOID:0000000006244552
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is being driven.
On Board Diagnosis Logic
INFOID:0000000006244553
The MIL will not illuminate for this self-diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
INFOID:0000000006244554
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000006244555
1.
CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1805
1805
Brake switch
A brake switch signal is not sent to ECM
for extremely long time while the vehicle is
being driven.
• Harness or connectors
(Stop lamp switch circuit is open or shorted.)
• Stop lamp switch
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
Brake pedal
Stop lamp
Fully released
Not illuminated
Depressed
Illuminated
2011 Pathfinder
P1805 BRAKE SWITCH
EC-869
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-III or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E160
• 10 A fuse (No. 20)
• Harness for open and short between stop lamp switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK STOP LAMP 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 101 and stop lamp 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 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK STOP LAMP SWITCH
EC-870, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace stop lamp switch. Refer to
6.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
BBIA0560E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
2011 Pathfinder
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