2007 INFINITI FX35 steering

EC-518
[VQ35DE]
DTC P1564 ICC STEERING SWITCH
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 ProcedureNBS003X1
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-153, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
82 B/W Sensor ground
(ICC steering switch) [Engine is running]

Warm-up condition

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

ICC steering switch: OFF
Approximately 4.3V
[Ignition switch: ON]

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

CANCEL switch: Pressed Approximately 1.3V
[Ignition switch: ON]

RESUME/ACCELERATE switch: Pressed Approximately 3.7V
[Ignition switch: ON]

SET/COAST switch: Pressed Approximately 3.0V
[Ignition switch: ON]

DISTANCE switch: Pressed Approximately 2.2V
PBIB2625E

DTC P1564 ICC STEERING SWITCH EC-519
[VQ35DE]
C
D E
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G H
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M A
EC
Revision: 2006 July 2007 FX35/FX45
2. CHECK ICC STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “RESUME/ACC SW”, “SET SW”, “DIST SW” and “CANCEL 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.
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
DISTANCE switch DIST SW Pressed ON
Released OFF
MBIB0064E
Switch Condition Voltage [V]
MAIN switch Pressed Approx. 0
Released Approx. 4.3
CANCEL switch Pressed Approx. 1.3
Released Approx. 4.3
RESUME/ACCELER-
ATE switch Pressed Approx. 3.7
Released Approx. 4.3
SET/COAST switch Pressed Approx. 3.0
Released Approx. 4.3
DISTANCE switch Pressed Approx. 2.2
Released Approx. 4.3
PBIB0311E

EC-520
[VQ35DE]
DTC P1564 ICC STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
3. CHECK ICC 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 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.
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 ICC 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 ICC STEERING SWITCH
Refer to EC-521, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ICC steering switch.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-147, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.
Continuity should exist.

DTC P1564 ICC STEERING SWITCH EC-521
[VQ35DE]
C
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EC
Revision: 2006 July 2007 FX35/FX45
Component InspectionNBS003X2
ICC STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M203.
2. Check continuity between combination switch (spiral cable) ter- minals 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
PBIB1621E

EC-522
[VQ35DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
DTC P1564 ASCD STEERING SWITCHPFP:25551
Component DescriptionNBS003X3
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-35, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeNBS003X4
Specification data are reference values.
On Board Diagnosis LogicNBS003X5

This self-diagnosis has the one trip detection logic.

The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-480, "
DTC P0605 ECM".
PBIB3255E
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
(ASCD steering switch circuit is open or
shorted.)

ASCD steering switch

ECM

DTC P1564 ASCD STEERING SWITCH EC-523
[VQ35DE]
C
D E
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EC
Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS003X6
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 RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
7. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
8. If DTC is detected, go to EC-525, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y

EC-524
[VQ35DE]
DTC P1564 ASCD STEERING SWITCH
Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS003X7
TBWM0733E

DTC P1564 ASCD STEERING SWITCH EC-525
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
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 ProcedureNBS003X8
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-153, "
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
(ASCD steering switch) [Engine is running]

Warm-up condition

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

ASCD steering switch: OFF
Approximately 4.0V
[Ignition switch: ON]

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

CANCEL switch: Pressed Approximately 1.0V
[Ignition switch: ON]

RESUME/ACCELERATE switch: Pressed Approximately 3.0V
[Ignition switch: ON]

SET/COAST switch: Pressed Approximately 2.0V
PBIB2625E