Infiniti M35/M45 Y50. Manual — part 523
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DTC P1564 ASCD STEERING SWITCH
EC-565
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Component Inspection
NBS0054W
ASCD STEERING SWITCH
1.
Disconnect combination switch (spiral cable) harness connector M303.
2.
Check continuity between combination switch terminals 18 and
21 with pushing each switch.
If NG, replace ASCD steering 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
PBIB2739E
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EC-566
[VQ35DE]
DTC P1568 ICC FUNCTION
DTC P1568 ICC FUNCTION
PFP:18995
On Board Diagnosis Logic
NBS0054X
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
●
If DTC P1568 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to
EC-161, "DTC U1000, U1001 CAN COMMUNICATION LINE"
.
●
If DTC P1568 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to
EC-164, "DTC U1010 CAN COMMUNICATION"
.
●
If DTC P1568 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to
DTC Confirmation Procedure
NBS0054Y
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.
TESTING CONDITION:
Step 4 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.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Press MAIN switch on ICC steering switch.
4.
Drive the vehicle at more than 40 km/h (25 MPH).
5.
Press SET/COAST switch.
6.
If DTC is detected, go to
EC-566, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
NBS0054Z
1.
REPLACE ICC SENSOR INTEGRATED UNIT
1.
Replace ICC sensor integrated unit.
2.
Perform
3.
Check DTC of ICC sensor integrated unit. Refer to
ACS-40, "TROUBLE DIAGNOSIS FOR SELF-DIAG-
>> INSPECTION END
DTC No.
Trouble Diagnosis
Name
DTC Detecting Condition
Possible Cause
P1568
1568
ICC function
ECM detects a difference between signals
from ICC sensor integrated unit is out of spec-
ified range.
●
Harness or connectors
(The CAN communication line is open or
shorted.)
●
ICC sensor integrated unit
●
ECM
PBIB2673E
![](/vehicles/zatt/cen/houeebante/joff.png)
DTC P1572 ICC BRAKE SWITCH
EC-567
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P1572 ICC BRAKE SWITCH
PFP:25320
Component Description
NBS00550
When the brake pedal is depressed, ICC brake switch (2) is turned
OFF and stop lamp switch (1) is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to
for the ICC function.
CONSULT-II Reference Value in Data Monitor Mode
NBS00551
Specification data are reference values.
On Board Diagnosis Logic
NBS00552
This diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
●
If DTC P1572 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.
PBIB2705E
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW1
(ICC 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
ICC brake switch
A)
ON signals from the stop lamp switch and
the ICC brake switch are sent to ECM at
the same time.
●
Harness or connectors
(The stop lamp switch circuit is shorted.)
●
Harness or connectors
(The ICC brake switch circuit is shorted.)
●
Stop lamp switch
●
ICC brake switch
●
ICC brake hold relay
●
Incorrect stop lamp switch installation
●
Incorrect ICC brake switch installation
●
ECM
B)
ICC brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving
![](/vehicles/zatt/cen/houeebante/kun.png)
EC-568
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
DTC Confirmation Procedure
NBS00553
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 lamp lights up.
4.
Drive the vehicle for at least 5 consecutive seconds under the
following conditions.
If 1st trip DTC is detected, go to
EC-570, "Diagnostic Procedure"
.
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.
If 1st trip DTC is detected, go to
EC-570, "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
PBIB2386E
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.
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