Infiniti I35 (A33). Manual — part 221
Diagnostic Procedure
NHEC1292
1
CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Remove engine coolant temperature sensor.
3. Check resistance between engine coolant temperature sensor terminals under the following conditions.
SEF304X
OK or NG
OK
©
INSPECTION END
NG
©
Replace engine coolant temperature sensor.
GI
MA
EM
LC
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AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0128 THERMOSTAT FUNCTION
Diagnostic Procedure
EC-225
SEF463R
SEF288D
Component Description
NHEC0873
The heated oxygen sensor 1 is placed into the front tube. It detects
the amount of oxygen in the exhaust gas compared to the outside
air. The heated oxygen sensor 1 has a closed-end tube made of
ceramic zirconia. The zirconia generates voltage from approxi-
mately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM
adjusts the injection pulse duration to achieve the ideal air-fuel
ratio. The ideal air-fuel ratio occurs near the radical change from
1V to 0V.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0874
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)
I
Engine: After warming up
Maintaining engine speed at 2,000
rpm
0 - 0.3V
+,
Approx. 0.6 - 1.0V
HO2S1 MNTR
(B1)
HO2S1 MNTR
(B2)
LEAN
+,
RICH
Changes more than 5 times during
10 seconds.
SEF301UA
On Board Diagnosis Logic
NHEC0876
To judge the malfunction, the diagnosis checks that the heated
oxygen sensor 1 output is not inordinately high.
DTC P0132, P0152 HO2S1
Component Description
EC-226
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0132
0132
(Bank 1)
P0152
0152
(Bank 2)
Heated oxygen sen-
sor 1 circuit high volt-
age
An excessively high voltage from the sensor is
sent to ECM.
I
Harness or connectors
(The sensor circuit is open or
shorted.)
I
Heated oxygen sensor 1
SEF174Y
DTC Confirmation Procedure
NHEC0877
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.
WITH CONSULT-II
NHEC0877S01
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch OFF and wait at least 10 seconds.
3)
Turn ignition switch ON.
4)
Select “DATA MONITOR” mode with CONSULT-II.
5)
Restart engine and let it idle for 25 seconds.
6)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-230.
WITH GST
NHEC0877S02
Follow the procedure “WITH CONSULT-II” above.
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IDX
DTC P0132, P0152 HO2S1
On Board Diagnosis Logic (Cont’d)
EC-227
Wiring Diagram
NHEC0878
BANK 1
NHEC0878S01
MEC537D
SEC107D
DTC P0132, P0152 HO2S1
Wiring Diagram
EC-228
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