2006 INFINITI M35 Factory Service Manual

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Page 2777 of 5621

INFINITI M35 2006 Factory Service Manual EC-1234
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DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 January2006 M35/M45
5. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors F102, M72
Harness for open or sho

Page 2778 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-1235
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Revision: 2006 January2006 M35/M45
Component InspectionNBS005KF
INTAKE VALVE TIMING CONTROL POSITION SENSOR
1. D

Page 2779 of 5621

INFINITI M35 2006 Factory Service Manual EC-1236
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DTC P1148, P1168 CLOSED LOOP CONTROL
Revision: 2006 January2006 M35/M45
DTC P1148, P1168 CLOSED LOOP CONTROLPFP:22690
On Board Diagnosis LogicNBS005KH
These self-diagnoses have the on

Page 2780 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1211 TCS CONTROL UNIT
EC-1237
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Revision: 2006 January2006 M35/M45
DTC P1211 TCS CONTROL UNITPFP:47850
DescriptionNBS005KI
The malfunction information related

Page 2781 of 5621

INFINITI M35 2006 Factory Service Manual EC-1238
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DTC P1212 TCS COMMUNICATION LINE
Revision: 2006 January2006 M35/M45
DTC P1212 TCS COMMUNICATION LINEPFP:47850
DescriptionNBS005KM
NOTE:
If DTC P1212 is displayed with DTC U1000

Page 2782 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1217 ENGINE OVER TEMPERATURE
EC-1239
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Revision: 2006 January2006 M35/M45
DTC P1217 ENGINE OVER TEMPERATUREPFP:00000
DescriptionNBS005KQ
SYSTEM DESCRIPTION
NOTE:

DTC P1217 ENGINE OVER TEMPERATURE
EC-1239
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Revision: 2006 January2006 M35/M45
DTC P1217 ENGINE OVER TEMPERATUREPFP:00000
DescriptionNBS005KQ
SYSTEM DESCRIPTION
NOTE:
If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-886, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
If DTC P1217 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to EC-889, "
DTC U1010 CAN COMMUNICATION" .
Cooling Fan Control
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, air conditioner
ON signal, refrigerant pressure, target A/C evaporator temperature and A/C evaporator temperature.
Cooling fan control signal is sent to IPDM E/R from ECM by CAN communication line. Then, IPDM E/R sends
ON/OFF pulse duty signal to cooling fan control module. Corresponding to this ON/OFF pulse duty signal,
cooling fan control module gives cooling fan motor operating voltage to cooling fan motors. Cooling fan speed
is controlled by duty cycle of cooling fan motor operating voltage sent from cooling fan control module.
COMPONENT DESCRIPTION
Cooling Fan Control Module
Cooling fan control module (1) receives ON/OFF pulse duty signal
from IPDM E/R. Corresponding to this ON/OFF pulse duty signal,
cooling fan control module sends cooling fan motor operating volt-
age to cooling fan motor. The revolution speed of cooling fan motor
is controlled by duty cycle of the voltage.
: Vehicle front
Cooling fan motor-1 harness connector (2)
Cooling fan motor-2 harness connector (3)
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
Cooling fan
control
IPDM E/R
Cooling fan relay
Cooling fan control
module Battery
Battery voltage*
1
Wheel sensor
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch
Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure
Unified meter and A/C amp.
Target A/C evaporator temperature*
2
Intake sensor
A/C evaporator temperature*2
PBIB2691E

Page 2783 of 5621

INFINITI M35 2006 Factory Service Manual EC-1240
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
Cooling Fan Motor
Cooling fan motor receives cooling fan motor operating voltage from
cooling fan control modul

EC-1240
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
Cooling Fan Motor
Cooling fan motor receives cooling fan motor operating voltage from
cooling fan control module (1). The revolution speed of cooling fan
motor is controlled by duty cycle of the voltage.
: Vehicle front
Cooling fan motor-1 harness connector (2)
Cooling fan motor-2 harness connector (3)
CONSULT-II Reference Value in Data Monitor ModeNBS005KR
Specification data are reference values.
On Board Diagnosis LogicNBS005KS
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
This self-diagnosis has the one trip detection logic.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to CO-40, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-28, "Changing Engine Oil" .
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA-13, "
Anti-Freeze Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckNBS005KT
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WAR NING :
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
PBIB2691E
MONITOR ITEM CONDITION SPECIFICATION
FA N DU T Y
Engine: Running 0 - 100%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217Engine over tempera-
ture (Overheat)
Cooling fan does not operate properly (Over-
heat).
Cooling fan system does not operate prop-
erly (Overheat).
Engine coolant was not added to the system
using the proper filling method.
Engine coolant is not within the specified
range.
Harness or connectors
(The cooling fan circuit is open or
shorted.)
IPDM E/R
Cooling fan control module
Cooling fan motor
Radiator hose
Radiator
Radiator cap
Water pump
Thermostat
For more information, refer to EC-1249,
"Main 13 Causes of Overheating" .

Page 2784 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1217 ENGINE OVER TEMPERATURE
EC-1241
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Revision: 2006 January2006 M35/M45
WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator.
Allow en

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