2006 INFINITI M35 check engine

EC-1208
[VK45DE]
DTC P0550 PSP SENSOR
Revision: 2006 January2006 M35/M45
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 ProcedureNBS005JM
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-885, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
12 R/GPower steering pressure
sensor[Engine is running]
Steering wheel: Being turned0.5 - 4.5V
[Engine is running]
Steering wheel: Not being turned0.4 - 0.8V
67 B/WSensor ground
(MAF sensor, IAT sensor,
ECT sensor, EVAP control
system pressure sensor,
PSP sensor, ASCD/ICC
steering switch, Battery cur-
rent sensor, Refrigerant
pressure sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
68 L/YSensor power supply
(Power steering pressure
sensor)[Ignition switch: ON]Approximately 5V
1. Body ground M70 2. Body ground M16
PBIB2782E

EC-1210
[VK45DE]
DTC P0550 PSP SENSOR
Revision: 2006 January2006 M35/M45
6. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, E72
Harness connectors E11, F2
Harness for open or short between power steering pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK PSP SENSOR
Refer to EC-1210, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace PSP sensor.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-878, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionNBS005JN
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the
following conditions.
Removal and InstallationNBS005JO
POWER STEERING PRESSURE SENSOR
Refer to PS-38, "HYDRAULIC LINE" . Continuity should exist.
Condition Voltage
Steering wheel is being turned. 0.5 - 4.5V
Steering wheel is not being turned. 0.4 - 0.8V
MBIB0126E

DTC P0850 PNP SWITCH
EC-1223
[VK45DE]
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EC
Revision: 2006 January2006 M35/M45
DTC P0850 PNP SWITCHPFP:23006
Component DescriptionNBS005K2
When the selector lever position is P or N, park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-II Reference Value in Data Monitor ModeNBS005K3
Specification data are reference values.
On Board Diagnosis LogicNBS005K4
DTC Confirmation ProcedureNBS005K5
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the follow-
ing conditions.
If NG, go to EC-1226, "
Diagnostic Procedure" .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 50 consecutive sec-
onds.
6. If 1st trip DTC is detected, go to EC-1226, "
Diagnostic Procedure" .
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW
Ignition switch: ONSelector lever: P or N ON
Selector lever: Except above OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850Park/neutral position
switchThe signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.
Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
Park/neutral position (PNP) switch
Unified meter and A/C amp.
TCM
Position (Selector lever) Known-good signal
N or P position ON
Except above position OFF
SEF212Y
ENG SPEED 1,300 - 6,375 rpm
COOLAN TEMP/S More than 70
C (158F)
B/FUEL SCHDL 3.0 - 31.8 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
SEF213Y

EC-1232
[VK45DE]
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureNBS005KE
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.
Refer to EC-885, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
53 L/GIntake valve timing control
position sensor (bank 2)[Engine is running]
Warm-up condition
Idle speed0 - 1.0V
[Engine is running]
Engine speed: 2,000 rpm0 - 1.0V
111 S BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
11 9
120R
RPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
PBIB2734E
PBIB2735E
1. Body ground M70 2. Body ground M16
PBIB2782E

EC-1240
[VK45DE]
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" .

DTC P1217 ENGINE OVER TEMPERATURE
EC-1241
[VK45DE]
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Revision: 2006 January2006 M35/M45
WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Turn ignition switch ON.
4. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
5. Make sure that cooling fan speed varies according to the per-
cent.
6. If the results are NG, go to EC-1244, "
Diagnostic Procedure" .
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-24, "
Auto Active Test" .
4. If NG, go to EC-1244, "
Diagnostic Procedure" .
SEF621W
PBIB2737E
SEF621W

EC-1244
[VK45DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNBS005KV
1. CHECK COOLING FAN OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that cooling fan speed varies according to the per-
cent.
Without CONSULT-II
1. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-24, "
Auto Active Test" .
2. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 2.
NG >> GO TO 6.
2. CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 3.
NG >> Check the following for leak. Refer to CO-40, "
LEAK
CHECK" .
Hose
Radiator
Water pump
3. CHECK RADIATOR CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 4.
NG >> Replace radiator cap.
PBIB2737E
Testing pressure: 157 kPa (1.6 kg/cm2 , 23 psi)
PBIC1528E
Radiator cap
relief pressure:59 - 98 kPa (0.6 - 1.0 kg/cm2 , 9 - 14 psi)
SLC755A

DTC P1217 ENGINE OVER TEMPERATURE
EC-1245
[VK45DE]
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Revision: 2006 January2006 M35/M45
4. CHECK THERMOSTAT
Check the following.
Thermostat. (Refer to CO-55, "THERMOSTAT AND WATER CONTROL VALVE" .)
Water control valve. (Refer to CO-55, "THERMOSTAT AND WATER CONTROL VALVE" .)
Engine coolant temperature sensor. (Refer to EC-953, "Component Inspection" .)
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning component.
5. CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to EC-1249, "
Main 13 Causes of Overheating" .
>>INSPECTION END
6. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module (1) harness connector
E42.
–: Vehicle front
–Cooling fan motor-1 harness connector (2)
–Cooling fan motor-2 harness connector (3)
3. Turn ignition switch ON.
4. Check voltage between cooling fan control module terminal 3
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 15.
7. CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between cooling fan control module terminal 1 and ground.
Refer to wiring diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to power in harness or connectors.
PBIB2691E
Voltage: Battery voltage
PBIA9509J
Continuity should exist.