2006 INFINITI M35 Motor

BRC-32
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
For Fast and Accurate DiagnosisNFS000QJ
PRECAUTIONS FOR DIAGNOSIS
Before performing diagnosis, always read General Information (GI) to confirm general precautions. Refer
to GI-4, "
General Precautions" .
If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit
(control unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neu-
tral position of steering angle sensor before driving. Refer to BRC-6, "
Adjustment of Steering Angle Sen-
sor Neutral Position" .
After diagnosis is finished, be sure to erase memory. Refer to BRC-23, "ERASE MEMORY" .
When checking continuity and voltage between unit, be sure to check for disconnection, looseness, bend,
or collapse of connector terminals. If any malfunction is found, repair or replace connector terminals.
For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.
If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
The following symptoms may be caused by normal operations.
Symptom Symptom description Result
Motor operation soundThis is sound of motor inside VDC actuator. Slight sound may occur
during VDC, TCS, and ABS operation.
Normal
Just after engine starts, the motor operating sound may be heard. This
is a normal condition of the system operation check.
System operation check
soundWhen engine starts, slight “click” sound may be heard from engine
room. This is normal and is part of system operation check.Normal
VDC/TCS operation
(SLIP indicator lamp ON)TCS may activate momentarily if wheel speed changes when driving
over location where friction varies, when downshifting, or when fully
depressing accelerator pedal.Normal
Cancel the VDC/TCS
function for the
inspection on a chas-
sis dynamometer. When checking speed meter etc. with a 2-wheel-drive chassis dyna-
mometer, vehicle speed is not increased by pressing down on the accel-
erator.
ABS operation (Longer stop-
ping distance)On roads with low friction, such as snowy roads or gravel roads, vehi-
cles with ABS may require a longer stopping distance. Therefore, when
driving on such roads, avoid overconfidence and keep speed sufficiently
low.Normal
Insufficient feeling of accel-
erationDepending on road conditions, driver may feel that feeling of accelera-
tion is insufficient. This is because traction control, which controls
engine and brakes to achieve optimal traction, has the highest priority
(for safety). As a result, there may be times when acceleration is slightly
less than usual for the same accelerator pedal operation.Normal

BRC-38
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
3. Turn ignition switch OFF and check continuity between ABS
actuator and electric unit (control unit) harness connector E30
terminal 1, 4 and ground.
OK or NG
OK >>Check battery for terminal looseness, low voltage, etc. If any malfunction is found, repair mal-
functioning parts.
Perform the self-diagnosis, and make sure that the result shows NO DTC IS DETECTED.
NG >>
Repair or replace malfunctioning components.
Perform the self-diagnosis, and make sure that the result shows NO DTC IS DETECTED.
Inspection 5: ABS Motor and Motor Relay CircuitNFS000QP
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30,
check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
2. Reconnect connector and perform self-diagnosis.
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
SFIA3033E
ABS actuator and electric unit (control unit) Ground Continuity
1, 4 — Yes
Self-diagnosis results
PUMP MOTOR

TROUBLE DIAGNOSIS
BRC-39
[VDC/TCS/ABS]
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BRC
Revision: 2006 January2006 M35/M45
3. CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E30.
2. Check voltage between the ABS actuator and electric unit (con-
trol unit) harness connector E30 terminal 2 and ground.
OK or NG
OK >> GO TO 4.
NG >>
Repair or replace malfunctioning components.
Perform the self-diagnosis, and make sure that the result shows NO DTC IS DETECTED.
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) harness connector E30 terminal 1, 4 and ground.
OK or NG
OK >>Replace ABS actuator and electric unit (control unit).
Perform the self-diagnosis, and make sure that the result shows NO DTC IS DETECTED.
NG >>
Repair or replace malfunctioning components.
Perform the self-diagnosis, and make sure that the result shows NO DTC IS DETECTED.
SFIA3034E
ABS actuator and electric unit (control unit) Ground Voltage
2 — Battery voltage (Approx. 12 V)
SFIA3033E
ABS actuator and electric unit (control unit) Ground Continuity
1, 4 — Yes

CO-22
[VQ35DE]
COOLING FAN
Revision: 2006 January2006 M35/M45
COOLING FANPFP:21140
ComponentsNBS004QY
Removal and Installation NBS004QZ
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-14, "ENGINE ROOM COVER" .
2. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-17, "
AIR CLEANER AND AIR DUCT"
.
3. Drain engine coolant from radiator. Refer to CO-11, "
ENGINE COOLANT" .
4. Disconnect harness connector from cooling fan control module, and move harness to aside.
5. Remove radiator hose (upper). Refer to CO-14, "
RADIATOR" .
6. Remove cooling fan assembly.
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Only use genuine parts for radiator shroud and cooling fan mounting bolt and observe the specified
torque (to prevent radiator from being damaged).
INSPECTION AFTER INSTALLATION
Make sure that fan motors operate normally.
1. Sub-harness 2. Cooling fan control module 3. Sub-harness
4. Fan motor (LH) 5. Fan motor (RH) 6. Fan shroud
7. Cooling fan (RH) 8. Cooling fan (LH)
A. Apply on fan motor shaft.
Apply Genuine High Strength Lock-
ing Sealant or equivalent.
KBIA3567J

COOLING FAN
CO-23
[VQ35DE]
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Revision: 2006 January2006 M35/M45
NOTE:
Cooling fans are controlled by cooling fan control module. For details, refer to EC-512, "
DTC P1217 ENGINE
OVER TEMPERATURE" .
Disassembly and Assembly NBS004R0
DISASSEMBLY
1. Disconnect sub-harness from fan motor (RH and LH) and cooling fan control module.
2. Remove cooling fan control module from fan shroud.
CAUTION:
Handle carefully to avoid dropping and shocks.
3. Remove cooling fan mounting nuts, and then remove the cooling fan (RH and LH).
4. Remove fan motor (RH and LH).
INSPECTION AFTER DISASSEMBLY
Cooling Fan
Inspect cooling fan for crack or unusual bend.
If anything is found, replace cooling fan.
ASSEMBLY
Note the following, and assemble in the reverse order of disassembly.
CAUTION:
RH and LH cooling fans are different. Be careful not to misassemble them.
Install each fan in the following position.
Secure the sub-harness tightly to the fan shroud to prevent the fan rotation area from being loose. Right side : 4 fans
Left side : 5 fans

COOLING FAN
CO-51
[VK45DE]
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Revision: 2006 January2006 M35/M45
COOLING FANPFP:21140
ComponentsNBS004RM
Removal and InstallationNBS004RN
REMOVAL
1. Remove engine room cover (RH and LH). Refer to EM-173, "ENGINE ROOM COVER" .
2. Remove air duct (inlet) and air cleaner case assembly. Refer to EM-177, "
AIR CLEANER AND AIR
DUCT" .
3. Drain engine coolant from radiator. Refer to CO-40, "
ENGINE COOLANT" .
4. Disconnect harness connector from cooling fan control module, and move harness to aside.
5. Remove radiator hose (upper). Refer to CO-43, "
RADIATOR" .
6. Remove cooling fan assembly.
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
Note the following, and Install in the reverse order of removal.
CAUTION:
Only use genuine parts for radiator shroud and cooling fan mounting bolt and observe the specified
torque (to prevent radiator from being damaged).
INSPECTION AFTER INSTALLATION
Make sure that fan motors operate normally.
1. Sub-harness 2. Cooling fan control module 3. Sub-harness
4. Fan motor (LH) 5. Fan motor (RH) 6. Fan shroud
7. Cooling fan (RH) 8. Cooling fan (LH)
A. Apply on fan motor shaft.
Apply Genuine High Strength Lock-
ing Sealant or equivalent.
KBIA3567J

CO-52
[VK45DE]
COOLING FAN
Revision: 2006 January2006 M35/M45
NOTE:
Cooling fans are controlled by cooling fan control module. For details. Refer to EC-1239, "
DTC P1217
ENGINE OVER TEMPERATURE" .
Disassembly and Assembly NBS004RO
DISASSEMBLY
1. Disconnect sub-harness from fan motor (RH and LH) and cooling fan control module.
2. Remove cooling fan control module from fan shroud.
CAUTION:
Handle carefully to avoid dropping and shocks.
3. Remove cooling fan mounting nuts, and then remove the cooling fan (RH and LH).
4. Remove fan motor (RH and LH).
INSPECTION AFTER DISASSEMBLY
Cooling Fan
Inspect cooling fan for crack or unusual bend.
If anything is found, replace cooling fan.
ASSEMBLY
Note the following, and assemble in the reverse order of disassembly.
CAUTION:
RH and LH cooling fans are different. Be careful not to misassemble them.
Install each fan in the following position.
Secure the sub-harness tightly to the fan shroud to prevent the fan rotation area from being loose. Right side : 4 fans
Left side : 5 fans

EC-6Revision: 2006 January2006 M35/M45 On Board Diagnosis Logic ....................................533
DTC Confirmation Procedure ...............................533
Diagnostic Procedure ...........................................534
Removal and Installation ......................................534
DTC P1226 TP SENSOR ........................................535
Component Description ........................................535
On Board Diagnosis Logic ....................................535
DTC Confirmation Procedure ...............................535
Diagnostic Procedure ...........................................536
Removal and Installation ......................................536
DTC P1550 BATTERY CURRENT SENSOR ..........537
Component Description ........................................537
CONSULT-II Reference Value in Data Monitor Mode
.537
On Board Diagnosis Logic ....................................537
DTC Confirmation Procedure ...............................538
Wiring Diagram .....................................................539
Diagnostic Procedure ...........................................540
Component Inspection ..........................................542
D T C P 1 5 5 1 , P 1 5 5 2 B A T T E R Y C U R R E N T S E N S O R .543
Component Description ........................................543
CONSULT-II Reference Value in Data Monitor Mode
.543
On Board Diagnosis Logic ....................................543
DTC Confirmation Procedure ...............................544
Wiring Diagram .....................................................545
Diagnostic Procedure ...........................................546
Component Inspection ..........................................548
DTC P1553 BATTERY CURRENT SENSOR ..........549
Component Description ........................................549
CONSULT-II Reference Value in Data Monitor Mode
.549
On Board Diagnosis Logic ....................................549
DTC Confirmation Procedure ...............................550
Wiring Diagram .....................................................551
Diagnostic Procedure ...........................................552
Component Inspection ..........................................554
DTC P1554 BATTERY CURRENT SENSOR ..........555
Component Description ........................................555
CONSULT-II Reference Value in Data Monitor Mode
.555
On Board Diagnosis Logic ....................................555
Overall Function Check ........................................556
Wiring Diagram .....................................................557
Diagnostic Procedure ...........................................558
Component Inspection ..........................................560
DTC P1564 ICC STEERING SWITCH ....................561
Component Description ........................................561
CONSULT-II Reference Value in Data Monitor Mode
.561
On Board Diagnosis Logic ....................................561
DTC Confirmation Procedure ...............................562
Wiring Diagram ................................................
.....563
Diagnostic Procedure ...........................................564
Component Inspection ..........................................567
DTC P1564 ASCD STEERING SWITCH ................568
Component Description ........................................568
CONSULT-II Reference Value in Data Monitor Mode
.568On Board Diagnosis Logic ....................................568
DTC Confirmation Procedure ................................569
Wiring Diagram .....................................................570
Diagnostic Procedure ............................................571
Component Inspection ..........................................574
DTC P1568 ICC FUNCTION ...................................575
On Board Diagnosis Logic ....................................575
DTC Confirmation Procedure ................................575
Diagnostic Procedure ............................................575
DTC P1572 ICC BRAKE SWITCH ..........................576
Component Description ........................................576
CONSULT-II Reference Value in Data Monitor Mode
.576
On Board Diagnosis Logic ....................................576
DTC Confirmation Procedure ................................577
Wiring Diagram .....................................................578
Diagnostic Procedure ............................................579
Component Inspection ..........................................584
DTC P1572 ASCD BRAKE SWITCH ......................585
Component Description ........................................585
CONSULT-II Reference Value in Data Monitor Mode
.585
On Board Diagnosis Logic ....................................585
DTC Confirmation Procedure ................................586
Wiring Diagram .....................................................587
Diagnostic Procedure ............................................588
Component Inspection ..........................................592
DTC P1574 ICC VEHICLE SPEED SENSOR .........593
Component Description ........................................593
On Board Diagnosis Logic ....................................593
DTC Confirmation Procedure ................................593
Diagnostic Procedure ............................................594
DTC P1574 ASCD VEHICLE SPEED SENSOR .....595
Component Description ........................................595
On Board Diagnosis Logic ....................................595
DTC Confirmation Procedure ................................595
Diagnostic Procedure ............................................596
DTC P1715 INPUT SPEED SENSOR (TURBINE
REVOLUTION SENSOR) ........................................597
Description ............................................................597
CONSULT-II Reference Value in Data Monitor Mode
.597
On Board Diagnosis Logic ....................................597
Diagnostic Procedure ..........................................
..597
DTC P1805 BRAKE SWITCH .................................598
Component Description ........................................598
CONSULT-II Reference Value in Data Monitor Mode
.598
On Board Diagnosis Logic ....................................598
DTC Confirmation Procedure ................................599
Wiring Diagram .....................................................600
Diagnostic Procedure ............................................601
Component Inspection ..........................................606
DTC P2100, P2103 THROTTLE CONTROL MOTOR
RELAY .....................................................................607
Component Description ........................................607
CONSULT-II Reference Value in Data Monitor Mode
.607
On Board Diagnosis Logic ....................................607