2005 INFINITI FX35 ABS

DTC P1564 ICC STEERING SWITCH EC-1253
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Revision: 2005 July 2005 FX
Component InspectionABS007U4
ICC STEERING SWITCH
1. Disconnect combination switch (spiral cable).
2. Check continuity between combination switch terminals 14 and 15 with pushing each switch.
If NG, replace ICC steering switch.
Switch Condition Resistance [ Ω]
MAIN switch Pressed Approx. 0
Released Approx. 5,500
CANCEL switch Pressed Approx. 310
Released Approx. 5,500
RESUME/ACCELERATE
switch Pressed Approx. 2,600
Released Approx. 5,500
SET/COAST switch Pressed Approx. 1,400
Released Approx. 5,500
DISTANCE switch Pressed Approx. 740
Released Approx. 5,500
PBIB0967E

EC-1254
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
DTC P1564 ASCD STEERING SWITCHPFP:25551
Component DescriptionABS007U5
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-727, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeABS007U6
Specification data are reference values.
On Board Diagnosis LogicABS007U7
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis .
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-1134
.
PBIB2557E
MONITOR ITEM CONDITION SPECIFICATION
MAIN SW

Ignition switch: ON MAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW

Ignition switch: ON CANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW

Ignition switch: ON RESUME/ACCELERATE switch:
Pressed ON
RESUME/ACCELERATE switch:
Released OFF
SET SW

Ignition switch: ON SET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
DTC No. Trouble diagnosis
name DTC detecting condition Possible cause
P1564
1564 ASCD steering
switch

An excessively high voltage signal from the ASCD
steering switch is sent to ECM.

ECM detects that input signal from the ASCD
steering switch is out of the specified range.

ECM detects that the ASCD steering switch is
stuck ON.

Harness or connectors
(The switch circuit is open or shorted.)

ASCD steering switch

ECM

DTC P1564 ASCD STEERING SWITCH EC-1255
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Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS007U8
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 10 seconds.
4. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
5. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec- onds.
7. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
8. If DTC is detected, go to EC-1257, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.

EC-1256
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
Wiring DiagramABS007U9
TBWM0725E

DTC P1564 ASCD STEERING SWITCH EC-1257
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Revision: 2005 July 2005 FX
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 ProcedureABS007UA
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-861, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
82 B/W Sensor ground [Engine is running]

Warm-up condition

Idle speed Approximately 0V
99 G/Y ASCD steering switch [Ignition switch: ON]

ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]

MAIN switch: Pressed Approximately 0V
[Ignition switch: ON]

CANCEL switch: Pressed Approximately 1V
[Ignition switch: ON]

RESUME/ACCELERATE switch: Pressed Approximately 3V
[Ignition switch: ON]

SET/COAST switch: Pressed Approximately 2V
PBIB2195E

EC-1260
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
Component InspectionABS007UB
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable).
2. Check continuity between combination switch terminals 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

DTC P1568 ICC FUNCTION EC-1261
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Revision: 2005 July 2005 FX
DTC P1568 ICC FUNCTIONPFP:18995
On Board Diagnosis LogicABS007UC
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-862, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC P1568 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-1134, "
DTC P0605 ECM"
DTC Confirmation ProcedureABS007UD
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-1261, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureABS007UE
1. REPLACE ICC UNIT
1. Replace ICC unit.
2. Perform ACS-9, "
ACTION TEST" .
3. Check DTC of ICC unit. Refer to ACS-41, "
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS" .
>> INSPECTION END
DTC No. Trouble Diagnosis
Name DTC Detecting Condition Possible Cause
P1568
1568 ICC function ECM detects a difference between signals
from ICC unit is out of specified range.

Harness or connectors
(The CAN communication line is open or
shorted.)

ICC unit

ECM
SEF058Y

EC-1262
[VK45DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2005 July 2005 FX
DTC P1572 ICC BRAKE SWITCHPFP:25320
Component DescriptionABS00DCB
When the brake pedal is depressed, ICC 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 ACS-6, "
DESCRIPTION" for the ICC function.
CONSULT-II Reference Value in Data Monitor ModeABS00DCC
Specification data are reference values.
On Board Diagnosis LogicABS00E5F
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 EC-1134, "
DTC P0605 ECM" .

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.
PBIB2558E
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)

When the vehicle speed is above 30 km/
h (19 MPH), 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