Infiniti I35 (A33). Manual — part 210
Description
NHEC0833
SYSTEM DESCRIPTION
NHEC0833S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
Heated
oxygen
sensor
heater 2
control
Heated oxygen sensor 2 heater
Engine coolant temperature sensor
Engine coolant temperature
Main air flow sensor
Amount of intake air
The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
NHEC0833S02
Engine speed rpm
Heated oxygen sensor 2 heater
Above 3,600
OFF
Below 3,600 (After the following conditions are met.)
I
After warming up
I
After keeping the engine speed between 3,500 and 4,000
rpm for 1 minute and at idle for 1 minute under no load
ON
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0834
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 HTR (B1)
HO2S2 HTR (B2)
I
Engine is running above 3,600 rpm.
OFF
I
Engine is running below 3,600 rpm after the following conditions are
met.
I
After warming up
I
After keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load
ON
On Board Diagnosis Logic
NHEC0836
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0037
0037
(Bank 1)
P0057
0057
(Bank 2)
Heated oxygen sen-
sor 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.)
I
Harness or connectors
(The heated oxygen sensor 2 heater
circuit is open or shorted.)
I
Heated oxygen sensor 2 heater
P0038
0038
(Bank 1)
P0058
0058
(Bank 2)
Heated oxygen sen-
sor 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.)
I
Harness or connectors
(The heated oxygen sensor 2 heater
circuit is shorted.)
I
Heated oxygen sensor 2 heater
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Description
EC-181
SEF174Y
DTC Confirmation Procedure
NHEC0837
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.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is between 11.0V and 16V at idle.
WITH CONSULT-II
NHEC0837S01
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 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 “Diagnostic Procedure”,
EC-185.
WITH GST
NHEC0837S02
Follow the procedure “WITH CONSULT-II” above.
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
DTC Confirmation Procedure
EC-182
Wiring Diagram
=NHEC0838
BANK 1
NHEC0838S01
MEC543D
SEC659DC
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Wiring Diagram
EC-183
BANK 2
NHEC0838S02
MEC544D
SEC660DC
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Wiring Diagram (Cont’d)
EC-184
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