2009 NISSAN LATIO Service Repair Manual

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NISSAN LATIO 2009 Service Repair Manual EC
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DTC Confirmation Procedure
INFOID:0000000004537209
Perform PROCEDURE FOR MALFUNCION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Proce

EC
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DTC Confirmation Procedure
INFOID:0000000004537209
Perform PROCEDURE FOR MALFUNCION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, 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-728, " 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 “COOLAN 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. Start engine and 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-728, " Diagnosis Procedure " .
If “CAN NOT BE DIAGNOSED” is displayed, perform the following.
a. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
b. Return to step 1.
Overall Function Check INFOID:0000000004537210
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 condition Possible 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

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NISSAN LATIO 2009 Service Repair Manual EC-726< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0138 HO2S2
With GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Star

Page 2083 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0138 HO2S2
EC-727
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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Wiring Diagram
INFOID:0000000004537211
Specification data are reference values and are measured between each

Page 2084 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-728< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0138 HO2S2
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground ot

Page 2085 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0138 HO2S2
EC-729
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
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CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 2 harness connector (2).
-

Page 2086 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-730< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0138 HO2S2
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CLEAR THE SELF-LEARNING DATA
With CONSULT-III
1. Start engine and warm

Page 2087 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0138 HO2S2
EC-731
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
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2. Disconnect heated oxygen sensor 2 harness connector (2).
- : Vehicle front
- Heated oxygen sensor 2 (1)
3.

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NISSAN LATIO 2009 Service Repair Manual EC-732< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0138 HO2S2
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68V at least once wh

EC-732< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0138 HO2S2
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.18V at least once when the “FUEL INJECTION” is −25%.
CAUTION:
• Discard any heated oxygen senso r which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface 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.
Without CONSULT-III
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 1 minute.
5. Set voltmeter probes between ECM terminal 50 (HO2S2 signal) and ground.
6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V and below 0.18V at least
once during this procedure.
If the voltage can be confirmed at step 6, step 7 is not nec-
essary.
7. Keep vehicle idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position
with OD OFF (A/T), D position (CVT) or 3rd gear position (M/T).
The voltage should be above 0.68 and below 0.18V at least
once during this procedure.
8. If NG, replace heated oxygen sensor 2. CAUTION:
• Discard any heated oxygen senso r which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface 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.
Removal and Installation INFOID:0000000004537214
HEATED OXYGEN SENSOR 2
Refer to EM-144 . PBIB3458E
PBIB2996E

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