Nissan Frontier D22. Manual — part 400
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
EC-703
[VG33E]
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EC
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
PFP:22690
Description
UBS00DFM
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 1 heaters corresponding to the engine
speed.
OPERATION
CONSULT-II Reference Value in Data Monitor Mode
UBS00DFN
Specification data are reference values.
On Board Diagnosis Logic
UBS00DFO
DTC Confirmation Procedure
UBS00DFP
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Start engine and run it for at least 6 seconds at idle speed.
3.
If 1st trip DTC is detected, go to
EC-708, "Diagnostic Procedure"
.
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor
Engine speed
Heated oxygen sensor 1
heater control
Heated oxygen sensor 1 heaters
Engine speed
rpm
Heated oxygen sensor 1 heaters
Above 2,800
OFF
Below 2,800
ON
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 HTR (B1)
HO2S1 HTR (B2)
●
Engine speed: Below 2,800 rpm
ON
●
Engine speed: Above 2,800 rpm
OFF
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0031
(Bank 1)
Heated oxygen
sensor 1 heater
control circuit low
The current amperage in the heated oxygen
sensor 1 heater circuit is out of the normal
range.
(An excessively low voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)
●
Harness or connectors
(The heated oxygen sensor 1 heater circuit is
open or shorted.)
●
Heater oxygen sensor 1 heater
P0051
(Bank 2)
P0032
(Bank 1)
Heated oxygen
sensor 1 heater
control circuit high
The current amperage in the heated oxygen
sensor 1 heater circuit is out of the normal
range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 1
heater.)
●
Harness or connectors
(The heated oxygen sensor 1 heater circuit is
shorted.)
●
Heater oxygen sensor 1 heater
P0052
(Bank 2)
SEF058Y
EC-704
[VG33E]
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
WITH GST
1.
Start engine and run it for at least 6 seconds at idle speed.
2.
Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
3.
Start engine and run it for at 6 seconds at idle speed.
4.
Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
5.
Start engine and run it for at 6 seconds at idle speed.
6.
Select MODE 3 with GST.
7.
If DTC is detected, go to
EC-708, "Diagnostic Procedure"
●
When using GST, DTC Confirmation Procedure should be performed twice as much as when using
CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. There-
fore, using CONSULT-II is recommended.
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
EC-705
[VG33E]
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EC
Wiring Diagram
UBS00DFQ
BANK 1
BBWA1077E
EC-706
[VG33E]
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
Specification data are reference values and are measured between each terminal and ground.
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 the ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
119
BR/Y
Heated oxygen sensor 1
heater (bank 1)
[Engine is running]
●
Engine speed is below 2,800 rpm
Approximately 0.4V
[Engine is running]
●
Engine speed is above 2,800 rpm
BATTERY VOLTAGE
(11 - 14V)
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