Nissan Frontier D22. Manual - part 400

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

EC-703

[VG33E]

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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)