Infiniti G35 (V35). Manual - part 327

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-189

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EC

2. 

CHECK HO2S2 POWER SUPPLY CIRCUIT

1.

Disconnect heated oxygen sensor 2 harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between HO2S2 terminal 2 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 M72, F102

●

Harness connectors E108, M15

●

IPDM E/R harness connector E7

●

15A fuse

●

Harness for open or short between heated oxygen sensor 2 and fuse

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

4. 

CHECK HO2S2 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5.

NG

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

PBIB1908E

Voltage: Battery voltage

PBIA9576J

DTC

Terminals

Bank

ECM

Sensor

P0037, P0038

25

3

1

P0057, P0058

6

3

2

Continuity should exist.

EC-190

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

5. 

CHECK HEATED OXYGEN SENSOR 2 HEATER

Refer to 

EC-190, "Component Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning heated oxygen sensor 2.

6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS000OM

HEATED OXYGEN SENSOR 2 HEATER

1.

Check resistance between HO2S2 terminals as follows.

2.

If NG, replace heated oxygen sensor 2.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped
from a height of more than 0.5 m (19.7 in) onto a hard sur-
face such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system
threads using Oxygen Sensor Thread Cleaner tool J-43897-
18 or J-43897-12 and approved anti-seize lubricant.

Removal and Installation

NBS000ON

HEATED OXYGEN SENSOR 2

Refer to 

EM-25, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

 .

Terminal No.

Resistance

2 and 3

3.4 - 4.4 

Ω

 [at 25

°

C (77

°

F)]

1 and 2, 3, 4

∞

 

Ω

(Continuity should not exist)

4 and 1, 2, 3

PBIB3344E

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

EC-191

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EC

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

PFP:23796

Component Description

NBS000VO

Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.

CONSULT-II Reference Value in Data Monitor Mode

NBS000VP

Specification data are reference values.

On Board Diagnosis Logic

NBS000VQ

DTC Confirmation Procedure

NBS000VR

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.

Start engine and let it idle for 5 seconds.

4.

If 1st trip DTC is detected, go to 

EC-196, "Diagnostic Procedure"

.

 WITH GST

Following the procedure “WITH CONSULT-II” above.

PBIB1842E

MONITOR ITEM

CONDITION

SPECIFICATION

INT/V SOL(B1)
INT/V SOL(B2)

●

Engine: After warming up

●

Shift lever: P or N (A/T), Neutral 
(M/T)

●

Air conditioner switch: OFF

●

No load

Idle

0% - 2%

When revving engine up to 2,000 rpm 
quickly

Approx. 0% - 50%

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0075
0075
(Bank 1)

Intake valve timing control 
solenoid valve circuit

An improper voltage is sent to the ECM 
through intake valve timing control solenoid 
valve.

●

Harness or connectors
(The intake valve timing control solenoid 
valve circuit is open or shorted.)

●

Intake valve timing control solenoid valve

P0081
0081
(Bank 2)

SEF058Y

EC-192

DTC P0075, P0081 IVT CONTROL SOLENOID VALVE

Wiring Diagram

NBS000VS

BANK 1

TBWM0348E