Nissan Frontier D22. Manual - part 402

 

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Nissan Frontier D22. Manual - part 402

 

 

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-711

[VG33E]

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EC

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

PFP:226A0

Description

UBS00DFU

SYSTEM DESCRIPTION

The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters corresponding to the engine
speed.

OPERATION

CONSULT-II Reference Value in Data Monitor Mode

UBS00DFV

Specification data are reference values.

On Board Diagnosis Logic

UBS00DFW

DTC Confirmation Procedure

UBS00DFX

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.

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

Heated oxygen sensor 2 
heater control

Heated oxygen sensor 2 heaters

Engine coolant temperature sensor

Engine coolant temperature

Mass air flow sensor

Amount of intake air

Engine speed rpm

Heated oxygen sensor 2 heater

Above 3,600

OFF

Below 3,600 rpm after the following conditions are met.

 Engine: After warning up

Keeping the engine speed between 3,500 and 4,000 rpm for 1 
minute and at idle for 1 minute under no load.

ON

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S2 HTR (B1)
HO2S2 HTR (B2)

Engine speed: Below 3,600 rpm after the following conditions are met.

Engine: After warning up

Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and 
at idle for 1 minute under no load.

ON

Engine speed: Above 3,600 rpm

OFF

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0037
(Bank 1)

Heated oxygen 
sensor 2 heater 
control circuit low

The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM 
through the heated oxygen sensor 2 heater.)

Harness or connectors
(The heated oxygen sensor 2 heater circuit is 
open or shorted.)

Heater oxygen sensor 2 heater

P0057
(Bank 2)

P0038
(Bank 1)

Heated oxygen 
sensor 2 heater 
control circuit high

The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to 
ECM through the heated oxygen sensor 2 
heater.)

Harness or connectors
(The heated oxygen sensor 2 heater circuit is 
shorted.)

Heater oxygen sensor 2 heater

P0058
(Bank 2)

EC-712

[VG33E]

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

 WITH CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

2.

Start engine and warm it up to the normal operating tempera-
ture.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Start engine and keep the engine speed at between 3,500 and
4,000 rpm for at least 1 minute under no load.

5.

Let engine idle for 1 minute.

6.

If 1st trip DTC is detected, go to 

EC-717, "Diagnostic Procedure"

.

 WITH GST

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

3.

Let engine idle for 1 minute.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

6.

Let engine idle for 1 minute.

7.

Select MODE 3 with GST.

8.

If DTC is detected, go to 

EC-717, "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.

SEF174Y

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-713

[VG33E]

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EC

Wiring Diagram

UBS00DFY

BANK 1

BBWA1116E

EC-714

[VG33E]

DTC P0037, P0038, P0057, P0058 HO2S2 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)

122

R/B

Heated oxygen sensor 2 
heater (bank 1)

[Engine is running]

Engine speed is below 3,600 rpm after the following 
conditions are met

Warm-up condition

Keeping the engine speed between 3,500 and 4,000 
rpm for 1 minute and at idle for 1 minute under no 
load

0 - 1.0V

[Ignition switch: ON] 

Engine stopped

[Engine is running]

Engine speed is above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

 

 

 

 

 

 

 

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