Nissan Frontier D22. Instruction — 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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