2011 NISSAN LATIO Service Repair Manual

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NISSAN LATIO 2011 Service Repair Manual DTC P0138 HO2S2EC-731
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DTC P0138 HO2S2
Component DescriptionINFOID:0000000006341890
The heated oxygen sensor 2, after three way catalyst

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NISSAN LATIO 2011 Service Repair Manual EC-732
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DTC P0138 HO2S2
DTC Confirmation Procedure
INFOID:0000000006341893
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR M

EC-732
< SERVICE INFORMATION >[MR18DE]
DTC P0138 HO2S2
DTC Confirmation Procedure
INFOID:0000000006341893
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
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.
PROCEDURE FOR MALFUNCTION A
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 2 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-735, "
Diagnosis Procedure".
PROCEDURE FOR MALFUNCTION B
With CONSULT-III
TESTING CONDITION:
For the best results, perform DTC WORK SUPPORT at a temperature of 0 to 30°C (32 to 86 °F).
1. Turn ignition switch ON and select “DATA MONITOR ” mode with CONSULT-III
2. Start engine and warm it up to the normal operating temperature.
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. Make sure that “COOLAN TEMP/S” indicates more than 70 °C (158° F).
If not, warm up engine and go to next step when “C OOLAN TEMP/S” indication reaches to 70°C (158° F).
7. Open engine hood.
8. Select “HO2S2 (B1) P1146” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-III.
9. Following the instruction of CONSULT-III. NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.
10. Make sure that “OK” is display ed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, refer to EC-735, "
Diagnosis Procedure".
If “CAN NOT BE DIAG NOSED” is displayed, perform the following.
a. Turn ignition switch OFF and leave the vehi cle in a cool place (soak the vehicle).
b. Return to step 1.
Overall Function CheckINFOID:0000000006341894
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st
trip DTC might not be confirmed.
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0138
0138 Heated oxygen sensor 2
circuit high voltage A)
An excessively high voltage from the
sensor is sent to ECM. • Harness or connectors
(Heated oxygen sensor 2 circuit is open
or shorted.)
• Heated oxygen sensor 2
B) The minimum voltage from the sensor
is not reached to the specified voltage. • Harness or connectors
(Heated oxygen sensor circuit is open or
shorted.)
• Heated oxygen sensor 2
• Fuel pressure
• Fuel injector
Revision: May 2010 2011 Versa

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NISSAN LATIO 2011 Service Repair Manual DTC P0138 HO2S2EC-733
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With GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wai

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NISSAN LATIO 2011 Service Repair Manual EC-734
< SERVICE INFORMATION >[MR18DE]
DTC P0138 HO2S2
Wiring Diagram
INFOID:0000000006341895
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is

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NISSAN LATIO 2011 Service Repair Manual DTC P0138 HO2S2EC-735
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM

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NISSAN LATIO 2011 Service Repair Manual EC-736
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DTC P0138 HO2S2
2.CHECK HO2S2 GROUND CIRCUI
T FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2 harness connector (2).
- : Vehicle front
- Heated oxygen se

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NISSAN LATIO 2011 Service Repair Manual DTC P0138 HO2S2EC-737
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OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CLEAR THE SELF-LEARNING DATA
With CONSULT

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NISSAN LATIO 2011 Service Repair Manual EC-738
< SERVICE INFORMATION >[MR18DE]
DTC P0138 HO2S2
2. Disconnect heated oxygen sensor 2 harness connector (2).
- : Vehicle front
- Heated oxygen sensor 2 (1)
3. Disconnect ECM harness connector.
4

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