Infiniti M35/M45 Y50. Manual — part 606
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-897
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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.
5.
CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to
EC-897, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace malfunctioning heated oxygen sensor 2.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
NBS005BV
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.
DTC
Terminals
Bank
ECM
Sensor
P0037, P0038
6
3
1
P0057, P0058
25
3
2
Continuity should exist.
Terminal No.
Resistance
2 and 3
5.0 - 7.0
Ω
[at 25
°
C (77
°
F)]
1 and 2, 3, 4
∞
Ω
(Continuity should not exist)
4 and 1, 2, 3
PBIB0970E
EC-898
[VK45DE]
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Removal and Installation
NBS005BW
HEATED OXYGEN SENSOR 2
Refer to
DTC P0075, P0081 IVT CONTROL SOLENOID VALVE
EC-899
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P0075, P0081 IVT CONTROL SOLENOID VALVE
PFP:23796
Component Description
NBS005BX
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
NBS005BY
Specification data are reference values.
On Board Diagnosis Logic
NBS005BZ
DTC Confirmation Procedure
NBS005C0
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-904, "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
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
0% - 2%
2,000 rpm
Approx. 25% - 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
(Intake valve timing control solenoid valve
circuit is open or shorted.)
●
Intake valve timing control solenoid valve
P0081
0081
(Bank 2)
SEF058Y
EC-900
[VK45DE]
DTC P0075, P0081 IVT CONTROL SOLENOID VALVE
Wiring Diagram
NBS005C1
BANK 1
TBWT1036E
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