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EC-1256
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DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
Wiring DiagramABS007U9
TBWM0725E
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Specification data are reference values and are measured between each terminal and g INFINITI FX35 2005 Service Manual DTC P1564 ASCD STEERING SWITCH EC-1257
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Specification data are reference values and are measured between each terminal and g](/manual-img/42/57020/w960_57020-2649.png)
DTC P1564 ASCD STEERING SWITCH EC-1257
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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
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![INFINITI FX35 2005 Service Manual EC-1258
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DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
2. CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “CANCEL SW INFINITI FX35 2005 Service Manual EC-1258
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DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
2. CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “CANCEL SW](/manual-img/42/57020/w960_57020-2650.png)
EC-1258
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DTC P1564 ASCD STEERING SWITCH
Revision: 2005 July 2005 FX
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 ECM harness connector M203.
3. Disconnect combination switch harness connector.
4. Check harness continuity between combination switch terminal 15 and ECM terminal 82. 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/ACCEL-
ERATE 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.
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4. DETECT MALFUNCTIONING PART
Check the following.
Combination switch (spiral cabl INFINITI FX35 2005 Service Manual DTC P1564 ASCD STEERING SWITCH EC-1259
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4. DETECT MALFUNCTIONING PART
Check the following.
Combination switch (spiral cabl](/manual-img/42/57020/w960_57020-2651.png)
DTC P1564 ASCD STEERING SWITCH EC-1259
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4. DETECT MALFUNCTIONING PART
Check the following.
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 14. 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.
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
Refer to EC-1260, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ASCD steering switch.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-854, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.
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EC-1260
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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
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DTC P1568 ICC FUNCTIONPFP:18995
On Board Diagnosis LogicABS007UC
This self-diagnosis has the INFINITI FX35 2005 Service Manual DTC P1568 ICC FUNCTION EC-1261
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DTC P1568 ICC FUNCTIONPFP:18995
On Board Diagnosis LogicABS007UC
This self-diagnosis has the](/manual-img/42/57020/w960_57020-2653.png)
DTC P1568 ICC FUNCTION EC-1261
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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
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![INFINITI FX35 2005 Service Manual EC-1262
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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 INFINITI FX35 2005 Service Manual EC-1262
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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](/manual-img/42/57020/w960_57020-2654.png)
EC-1262
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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
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DTC Confirmation ProcedureABS00E5G
CAUTION:
Always drive vehicle at a safe speed.
NOTE INFINITI FX35 2005 Service Manual DTC P1572 ICC BRAKE SWITCH EC-1263
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DTC Confirmation ProcedureABS00E5G
CAUTION:
Always drive vehicle at a safe speed.
NOTE](/manual-img/42/57020/w960_57020-2655.png)
DTC P1572 ICC BRAKE SWITCH EC-1263
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DTC Confirmation ProcedureABS00E5G
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-1265, "
Diagnostic Proce-
dure" .
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-1265, "
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.