Infiniti F50. Manual - part 454

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

EC-457

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EC

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)

73

Y

Intake valve timing 
control position sensor 
(bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

0 - 1.0V

[Engine is running]

●

Engine speed is 2,000 rpm.

0 - 1.0V

PBIB0054E

PBIB0055E

EC-458

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

BANK 2

TBWM0162E

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

EC-459

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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 Procedure

EBS00MID

1. 

CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect intake valve timing control position sensor harness connector.

3.

Turn ignition switch “ON”.

4.

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 3.

NG

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

74

W

Intake valve timing 
control position sensor 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

0 - 1.0V

[Engine is running]

●

Engine speed is 2,000 rpm.

0 - 1.0V

PBIB0054E

PBIB0055E

Voltage: Battery voltage

PBIB1245E

SEF509Y

EC-460

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E32, F32

●

Fuse, fusible link and relay block (J/B) connector E3

●

10A fuse

●

Harness for open or short between intake valve timing control position sensor and fuse

>> Repair harness or connectors.

3. 

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 engine
ground. Refer to Wiring Diagram.

3.

Also check harness for short to power. 

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Joint connector-29

●

Harness for open or short between intake valve timing control position sensor and engine ground

>> Repair open circuit or short to power in harness or connectors.

5. 

CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN 

AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 73 (bank 1) and intake valve timing control position sen-
sor terminal 2, or ECM terminal 74 (bank 2) and intake valve timing control position sensor terminal 2.
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 INTAKE VALVE TIMING CONTROL POSITION SENSOR

Refer to 

EC-461, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace intake valve timing control position sensor.

Continuity should exist.

Continuity should exist.