Infiniti G35 (V35) Sedan. Manual - part 551

EC-350

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1078, P1084 EVT CONTROL POSITION SENSOR

Component Inspection

INFOID:0000000000956733

1.

EXHAUST VALVE TIMING CONTROL POSITION SENSOR-I

1.

Turn ignition switch OFF.

2.

Disconnect exhaust valve timing control position sensor harness connector.

3.

Loosen the fixing bolt of the sensor.

4.

Remove the sensor.

5.

Visually check the sensor for chipping.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning exhaust valve timing control

position sensor.

2.

EXHAUST VALVE TIMING CONTROL POSITION SENSOR-II

Check resistance exhaust valve timing control position sensor terminals as shown below.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning exhaust valve timing control position sensor.

JMBIA0065ZZ

Terminals

Resistance

1 (+) - 2 (-)

Except 0 or 

∞

 

Ω

 [at 25

°

C (77

°

F)]

1 (+) - 3 (-)

2 (+) - 3 (-)

P1148, P1168 CLOSED LOOP CONTROL

EC-351

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1148, P1168 CLOSED LOOP CONTROL

DTC Logic

INFOID:0000000000956734

DTC 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

Closed loop control 
function (bank 1)

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 short-
ed.)

• A/F sensor 1
• A/F sensor 1 heater

P1168

Closed loop control 
function (bank 2)

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

EC-352

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1211 TCS CONTROL UNIT

P1211 TCS CONTROL UNIT

Description

INFOID:0000000000956735

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.

DTC Logic

INFOID:0000000000956736

DTC DETECTION LOGIC

Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

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

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>>

EC-352, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000956737

Go to 

BRC-4, "Work Flow"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1211

TCS control unit

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

• ABS actuator and electric unit (control 

unit)

• TCS related parts

P1212 TCS COMMUNICATION LINE

EC-353

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000000956738

This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse
signals are exchanged between ECM and “ABS actuator and electric unit (control unit)”.
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.

DTC Logic

INFOID:0000000000956739

DTC DETECTION LOGIC

NOTE:
• If DTC P1212 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC

U1000, U1001. Refer to 

EC-137, "DTC Logic"

.

• If DTC P1212 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer

to 

EC-138, "DTC Logic"

.

Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for at least 10 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-353, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000956740

Go to 

BRC-4, "Work Flow"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1212

TCS communication line

ECM can not receive the information from 
“ABS actuator and electric unit (control 
unit)” continuously.

• Harness or connectors

(The CAN communication line is open or short-
ed.)

• ABS actuator and electric unit (control unit)
• Dead (Weak) battery