Infiniti M35/M45 Y50. Manual - part 684

DTC P1140, P1145 IVT CONTROL POSITION SENSOR

EC-1209

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5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F102, M72

●

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-1210, "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-1081, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace crankshaft position sensor (POS).

9. 

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-1088, "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-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-1210

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DTC P1140, P1145 IVT CONTROL POSITION SENSOR

Component Inspection

NBS005KF

INTAKE VALVE TIMING CONTROL POSITION SENSOR

1.

Disconnect intake valve timing control position sensor harness connector.

2.

Loosen the fixing bolt of the sensor.

3.

Remove the sensor.

4.

Visually check the sensor for chipping.

5.

Check resistance as shown below.

6.

If NG, replace intake valve timing control position sensor.

Removal and Installation

NBS005KG

INTAKE VALVE TIMING CONTROL POSITION SENSOR

Refer to 

EM-203, "TIMING CHAIN"

 .

SEF362Z

Terminal No. (Polarity)

Resistance 

Ω

 [at 25

°

C (77

°

F)]

3 (+) - 1 (-)

Except 0 or 

∞

2 (+) - 1 (-)

3 (+) - 2 (-)

PBIB0194E

DTC P1148, P1168 CLOSED LOOP CONTROL

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DTC P1148, P1168 CLOSED LOOP CONTROL

PFP:22690

On Board Diagnosis Logic

NBS005KH

These self-diagnoses have the one trip detection logic.

NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1148
1148
(Bank 1)

Closed loop control 
function

The closed loop control function for bank 1 
does not operate even when vehicle is driving 
in the specified condition.

●

Harness or connectors
(The A/F sensor 1 circuit is open or 
shorted.)

●

A/F sensor 1

●

A/F sensor 1 heater

P1168
1168
(Bank 2)

The closed loop control function for bank 2 
does not operate even when vehicle is driving 
in the specified condition.

EC-1212

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DTC P1211 TCS CONTROL UNIT

DTC P1211 TCS CONTROL UNIT

PFP:47850

Description

NBS005KI

The malfunction information related to TCS is transferred through the CAN communication line from “ABS
actuator and electric unit (control unit)” to ECM.
Be sure to erase the malfunction information such as DTC not only for “ABS actuator and electric unit
(control unit)” but also for ECM after TCS related repair.

On Board Diagnosis Logic

NBS005KJ

Freeze frame data is not stored in the ECM for this self-diagnosis. The MIL will not light up for this self-
diagnosis.

DTC Confirmation Procedure

NBS005KK

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for at least 60 seconds.

4.

If 1st trip DTC is detected, go to 

EC-1212, "Diagnostic Proce-

dure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

NBS005KL

Go to 

BRC-10, "TROUBLE DIAGNOSIS"

 .

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1211
1211

TCS control unit

ECM receives a malfunction information from
“ABS actuator electric unit (control unit)”

●

ABS actuator and electric unit (control unit)

●

TCS related parts

SEF058Y