Nissan Pathfinder (2006 year). Instruction — part 210
DTC P1564 ASCD STEERING SWITCH
EC-539
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2006 Pathfinder
2.
CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with
CONSULT-II.
3.
Check each item indication under the following conditions.
Without CONSULT-II
1.
Turn ignition switch ON.
2.
Check voltage between ECM terminal 99 and ground with press-
ing each button.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 3.
3.
CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect combination switch harness connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between combination switch terminal 17 and ECM terminal 67. Refer to Wiring
Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
Switch Monitor
item
Condition
Indication
MAIN switch
MAIN SW
Pressed
ON
Released
OFF
CANCEL switch
CANCEL SW
Pressed
ON
Released
OFF
RESUME/ACCELER-
ATE switch
RESUME/ACC SW
Pressed
ON
Released
OFF
SET/COAST switch
SET SW
Pressed
ON
Released
OFF
SEC006D
Switch
Condition
Voltage [V]
MAIN switch
Pressed
Approx. 0
Released
Approx. 4
CANCEL switch
Pressed
Approx. 1
Released
Approx. 4
RESUME/ACCELERATE
switch
Pressed
Approx. 3
Released
Approx. 4
SET/COAST switch
Pressed
Approx. 2
Released
Approx. 4
PBIB0311E
Continuity should exist.
EC-540
DTC P1564 ASCD STEERING SWITCH
2006 Pathfinder
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M31, E152
●
Harness connectors E5, F14
●
Combination switch (spiral cable)
●
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 99 and combination switch terminal 18.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M31, E152
●
Combination switch (spiral cable)
●
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK ASCD STEERING SWITCH
EC-541, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace steering switch.
8.
CHECK INTERMITTENT INCIDENT
EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Continuity should exist.
DTC P1564 ASCD STEERING SWITCH
EC-541
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2006 Pathfinder
Component Inspection
UBS00KG1
ASCD STEERING SWITCH
1.
Disconnect combination switch (spiral cable).
2.
Check continuity between combination switch (spiral cable) ter-
minals 17 and 18 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
PBIB3176E
EC-542
DTC P1572 ASCD BRAKE SWITCH
2006 Pathfinder
DTC P1572 ASCD BRAKE SWITCH
PFP:25320
Component Description
UBS00KG2
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 this input of two kinds (ON/OFF signal).
Refer to
EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KG3
Specification data are reference values.
On Board Diagnosis Logic
UBS00KG4
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
●
If DTC P 1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to
.
●
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 OFF. And even when malfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
BBIA0560E
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW1
(ASCD brake switch)
●
Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly
depressed
OFF
BRAKE SW2
(Stop lamp switch)
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly
depressed
ON
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 vehi-
cle is driving
DTC P1572 ASCD BRAKE SWITCH
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2006 Pathfinder
DTC Confirmation Procedure
UBS00KG5
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
●
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
●
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.
TESTING CONDITION:
Steps 4 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.
WITH CONSULT-II
1.
Start engine (VDC switch OFF).
2.
Select “DATA MONITOR” mode with CONSULT-II.
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.
If DTC is detected, go to
EC-545, "Diagnostic Procedure"
If DTC is not detected, go to the following step.
5.
Drive the vehicle for at least 5 consecutive seconds under the
following condition.
6.
If DTC is detected, go to
EC-545, "Diagnostic Procedure"
WITH GST
Follow the procedure “WITH CONSULT-II” above.
VHCL SPEED SE
More than 30 km/h (19 MPH)
Selector 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.
PBIB2386E
EC-544
DTC P1572 ASCD BRAKE SWITCH
2006 Pathfinder
Wiring Diagram
UBS00KG6
BBWA2373E
DTC P1572 ASCD BRAKE SWITCH
EC-545
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2006 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
UBS00KG7
1.
CHECK OVERALL FUNCTION-I
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-II.
3.
Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-II
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.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
LG
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
108
LG
ASCD brake switch
[Ignition switch: ON]
●
Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
●
Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14V)
CONDITION
INDICATION
When brake pedal: Slightly depressed
OFF
When brake pedal: Fully released
ON
SEC011D
CONDITION
VOLTAGE
When brake pedal: Slightly depressed
Approximately 0V
When brake pedal: Fully released
Battery voltage
MBIB0061E
EC-546
DTC P1572 ASCD BRAKE SWITCH
2006 Pathfinder
2.
CHECK OVERALL FUNCTION-II
With CONSULT-II
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-II
Check voltage between ECM terminal 101 and ground under the following conditions.
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 7.
CONDITION
INDICATION
When brake pedal: Fully released
OFF
When brake pedal: Slightly depressed
ON
SEC013D
CONDITION
VOLTAGE
When brake pedal: Fully released
Approximately 0V
When brake pedal: Slightly depressed
Battery voltage
MBIB0060E
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