Nissan Frontier D22. Instruction — part 273
DTC P0133 HO2S1
EC-195
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
UBS00D46
BBWA0440E
EC-196
[KA24DE]
DTC P0133 HO2S1
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 ECM terminals, such as the ground.
Diagnostic Procedure
UBS00D47
1.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch OFF.
2.
Loosen and retighten engine ground screws.
>> GO TO 2.
2.
RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten corresponding heated oxygen sensor 1.
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
50
B
Heated oxygen sensor 1
[Engine is running]
●
After warming up to normal operating temperature
and engine speed is 2,000 rpm
0 - Approximately 1.0V
(Periodically change)
BBIA0431E
Tightening torque
: 40 - 60 N·m
(4.1 - 6.1 kg-m, 30 - 44 ft-lb)
BBIA0429E
DTC P0133 HO2S1
EC-197
[KA24DE]
C
D
E
F
G
H
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M
A
EC
3.
CHECK FOR EXHAUST GAS LEAK
1.
Start engine and run it at idle.
2.
Listen for an exhaust gas leak before three way catalyst.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
4.
CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace.
5.
CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode
with CONSULT-II.
3.
Clear the self-learning control coefficient by touching “CLEAR”.
4.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF.
3.
Disconnect mass air flow sensor harness connector, and restart
and run engine for at least 5 seconds at idle speed.
4.
Stop engine and reconnect mass air flow sensor harness connector.
5.
Make sure DTC P0102 is displayed.
6.
Erase the DTC memory. Refer to
EC-61, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFOR-
7.
Make sure DTC P0000 is displayed.
8.
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0172 detected?
Is it difficult to start engine?
Yes or No
Yes
>> Perform trouble diagnosis for DTC P0171 or P0172. Refer to
No
>> GO TO 6.
SEC502D
SEF968Y
EC-198
[KA24DE]
DTC P0133 HO2S1
6.
CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect heated oxygen sensor 1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between ECM terminal 50 and HO2S1
terminal 2.
Refer to Wiring Diagram.
5.
Check harness continuity between ECM terminal 50 or HO2S1
terminal 2 and ground.
Refer to Wiring Diagram.
6.
Also check harness for short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK HEATED OXYGEN SENSOR 1 HEATER
Check resistance between HO2S1 terminals 3 and 1.
Check continuity between HO2S1 terminals 2 and 1, 3 and 2.
CAUTION:
●
Discard any heated oxygen sensor which has been dropped
from a height of more than 0.5 m (19.7 in) onto a hard sur-
face such as a concrete floor; use a new one.
●
Before installing new oxygen sensor, clean exhaust system
threads using Oxygen Sensor Thread Cleaner tool J-43897-
18 or J-43897-12 and approved anti-seize lubricant.
OK or NG
OK
>> GO TO 8.
NG
>> Replace heated oxygen sensor 1.
8.
CHECK MASS AIR FLOW SENSOR
EC-199, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace mass air flow sensor.
9.
CHECK PCV VALVE
EC-199, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace PCV valve.
Continuity should exist.
Continuity should not exist.
BBIA0430E
Resistance
: 3.3 - 4.0
Ω [at 25°C (77°F)]
Continuity should not exist.
AEC158A
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