2007 INFINITI FX35 steering

DTC P1564 ICC STEERING SWITCH EC-1197
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Revision: 2006 July 2007 FX35/FX45
Component InspectionNBS004DZ
ICC STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M203.
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-1198
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
DTC P1564 ASCD STEERING SWITCHPFP:25551
Component DescriptionNBS004E0
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-697, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeNBS004E1
Specification data are reference values.
On Board Diagnosis LogicNBS004E2
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-1148
.
1. ASCD steering switch 2. MAIN switch 3. DISTANCE switch
(ICC models only)
4. CANCEL switch 5. SET/COAST switch 6. RESUME/ACCELERATE switch
PBIB3241E
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-1199
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Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004E3
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 seconds.
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-1201, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y

EC-1200
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS004E4
TBWM0725E

DTC P1564 ASCD STEERING SWITCH EC-1201
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Revision: 2006 July 2007 FX35/FX45
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 ProcedureNBS004E5
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-819, "
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-1202
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
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.
3. Disconnect combination switch harness connector M203.
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.

DTC P1564 ASCD STEERING SWITCH EC-1203
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Revision: 2006 July 2007 FX35/FX45
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-1204, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ASCD steering switch.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-812, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.

EC-1204
[VK45DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
Component InspectionNBS004E6
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M203.
2. Check continuity between combination switch terminals 14 and 15 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
PBIB0967E