INFINITI FX35 2006 Service Manual

DTC P0850 PNP SWITCH EC-1157
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Revision: 2006 December 2006 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 ProcedureNBS004F2
1. CHECK DTC WITH TCM
Refer to AT- 4 0 , "
OBD-II Diagnostic Trouble Code (DTC)" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2. CHECK STARTING SYSTEM
Turn ignition switch OFF, then turn it to START.
Does starter motor operate?
Ye s o r N o
Ye s > > G O T O 3 .
No >> Refer to SC-8, "
STARTING SYSTEM" .
3. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Disconnect “unified meter and A/C amp.” harness connector.
4. Check harness continuity between A/T assembly terminal 9 and “unified meter and A/C amp.” terminal 32. 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.

Harness connectors F102, M82

Harness for open or short between A/T assembly and “unified meter and A/C amp.”
>> Repair open circuit or short to ground or short to power in harness or connectors.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
102 LG/B PNP switch [Ignition switch: ON]

Selector lever: P or N
Approximately 0V
[Ignition switch: ON]

Selector lever: Except above BATTERY VOLTAGE
(11 - 14V)
Continuity should exist.

EC-1158
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DTC P0850 PNP SWITCH
Revision: 2006 December 2006 FX35/FX45
5. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and “unified meter and A/C amp.” terminal 25. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1. Check harness continuity between A/T assembly terminal 9 and TCM terminal 8. Refer to AT- 1 0 7 , "
DTC P0615 START SIGNAL CIRCUIT" .
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
8. REPLACE “UNIFIED METER AND A/C AMP.”
Refer to DI-28, "
UNIFIED METER AND A/C AMP" .
>> INSPECTION END
Continuity should exist.
Continuity should exist.

DTC P1140, P1145 IVT CONTROL POSITION SENSOR EC-1159
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Revision: 2006 December 2006 FX35/FX45
DTC P1140, P1145 IVT CONTROL POSITION SENSORPFP:23731
Component DescriptionNBS004B9
Intake valve timing control position sensors are located in the front of
cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake camshaft sprocket con-
cave (in four places). The ECM provides feedback to the intake valve
timing control for appropriate target valve open-close timing accord-
ing to drive conditions based on detected cam position.
CONSULT-II Reference Value in Data Monitor ModeNBS004BA
Specification data are reference values.
On Board Diagnosis LogicNBS004BB
DTC Confirmation ProcedureNBS004BC
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. Maintain the following conditions for at least 10 seconds.
4. If 1st trip DTC is detected, go to EC-1164, "
Diagnostic Proce-
dure" .
SEF359Z
MONITOR ITEM CONDITION SPECIFICATION
INT/V TIM (B1)
INT/V TIM (B2)

Engine: After warming up

Selector lever: P or N

Air conditioner switch: OFF

No load Idle
−5° - 5 °CA
2,000 rpm Approx. 0 ° - 20 °CA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1140
11 4 0
(Bank 1)
Intake valve timing control
position sensor circuit An excessively high or low voltage from the
sensor is sent to ECM.

Harness or connectors
(Intake valve timing control position
sensor circuit is open or shorted)

Intake valve timing control position
sensor

Crankshaft position sensor (POS)

Camshaft position sensor (PHASE)

Accumulation of debris to the signal
pick-up portion of the camshaft
sprocket
P1145
11 4 5
(Bank 2)
ENG SPEED More than idle speed
Selector lever P or N position
SEF058Y

EC-1160
[VK45DE]
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 December 2006 FX35/FX45
WITH GST
Follow the procedure “WITH CONSULT-II” above.

DTC P1140, P1145 IVT CONTROL POSITION SENSOR EC-1161
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS004BD
BANK 1
TBWM1347E

EC-1162
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DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 December 2006 FX35/FX45
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.) TER-
MINAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
72 BR Intake valve timing control
position sensor (bank 1) [Engine is running]

Warm-up condition

Idle speed
0 - 1.0V
[Engine is running]

Engine speed: 2,000rpm 0 - 1.0V
111 W / B ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF 0 - 1.5V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFF BATTERY VOLTAGE
(11 - 14V)
11 9
120 R
R/B Power supply for ECM
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
PBIB2046E

DTC P1140, P1145 IVT CONTROL POSITION SENSOR EC-1163
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Revision: 2006 December 2006 FX35/FX45
BANK 2
TBWM1348E

EC-1164
[VK45DE]
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 December 2006 FX35/FX45
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 ProcedureNBS004BE
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-818, "
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)
53 R/L Intake valve timing control
position sensor (bank 2) [Engine is running]

Warm-up condition

Idle speed
0 - 1.0V
[Engine is running]

Engine speed: 2,000 rpm 0 - 1.0V
111 W / B ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition
switch OFF 0 - 1.5V
[Ignition switch: OFF]

More than a few seconds after turning igni-
tion switch OFF BATTERY VOLTAGE
(11 - 14V)
11 9
120 R
R/B Power supply for ECM
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
PBIB2046E
PBIB2195E

DTC P1140, P1145 IVT CONTROL POSITION SENSOR EC-1165
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Revision: 2006 December 2006 FX35/FX45
2. CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Disconnect intake valve timing control position sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between intake valve timing control position sen- sor terminal 3 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E211, M41

Harness connectors F102, M82

Harness for open or short between intake valve timing control position sensor and IPDM E/R

Harness for open or short between intake valve timing control position sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT 1. Turn ignition switch OFF.
2. Check harness continuity between intake valve timing control position sensor terminal 1 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5. Voltage: Battery voltage
PBIB1517E
SEF509Y
Continuity should exist.

EC-1166
[VK45DE]
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Revision: 2006 December 2006 FX35/FX45
5. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors F102, M82

Harness for open or short between intake valve timing control position sensor and ground
>> Repair open circuit or short to power in harness or connectors.
6. CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between the following; ECM terminal 72 and intake valve timing control position sensor (bank 1) terminal 2 or
ECM terminal 53 and intake valve timing control position sensor (bank 2) terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR
Refer to EC-1167, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace intake valve timing control position sensor.
8. CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to EC-1036, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace crankshaft position sensor (POS).
9. CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-1043, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace camshaft position sensor (PHASE).
10. CHECK CAMSHAFT SPROCKET
Check accumulation of debris to the signal pick-up portion of the camshaft sprocket. Refer to EM-203, "
TIM-
ING CHAIN" .
OK or NG
OK >> GO TO 11.
NG >> Remove debris and clean the signal pick-up cutout of camshaft sprocket.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.