2005 NISSAN X-TRAIL check

DTC P1128 THROTTLE CONTROL MOTOR
EC-319
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Diagnostic ProcedureEBS010S0
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer to EC-132, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2021E

EC-320
[QR (WITH EURO-OBD)]
DTC P1128 THROTTLE CONTROL MOTOR

2. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Disconnect electric throttle control actuator harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following terminals.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace.
3. CHECK THROTTLE CONTROL MOTOR
Refer to EC-320, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4. CHECK INTERMITTENT INCIDENT
Refer to EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness or connectors.
5. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-47, "
Throttle Valve Closed Position Learning" .
3. Perform EC-47, "
Idle Air Volume Learning" .
>>INSPECTION END
Component InspectionEBS010S1
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
Electric throttle control
actuator terminalECM terminal Continuity
34 Should exist
5 Should not exist
64 Should not exist
5 Should exist
PBIB1992E
PBIB1971E

DTC P1128 THROTTLE CONTROL MOTOR
EC-321
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2. Check resistance between terminals 3 and 6.
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-47, "
Throttle Valve Closed Position Learning" .
5. Perform EC-47, "
Idle Air Volume Learning" .
Removal and InstallationEBS010S2
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-18, "INTAKE MANIFOLD" . Resistance: Approximately 1 - 15 Ω [at 25 °C (77°F)]
PBIB0095E

DTC P1143 HO2S1
EC-323
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DTC Confirmation ProcedureEBS010S6
CAUTION:
Always drive vehicle at a safe speed.
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:

Always perform at a temperature above −10°C (14°F).

Before performing following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Turn ignition switch ON and select “HO2S1 (B1) P1143” of “HO2S1” in “DTC WORK SUPPORT” mode
with CONSULT-II.
4. Touch “START”.
5. Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6. When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 50 seconds or more.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.
7. Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to EC-324, "
Diagnostic
Procedure" .
Overall Function CheckEBS010S7
Use this procedure to check the overall function of the heated oxygen sensor 1 circuit. During this check, a 1st
trip DTC might not be confirmed.
PBIB0546E
ENG SPEED QR20DE: 1,400 - 3,200 rpm
QR25DE: 1,200 - 2,800 rpm
VHCL SPEED SE Less than 100 km/h (62 MPH)
B/FUEL SCHDL QR20DE: 2.9 - 14.5 msec
QR25DE: 1.9 - 14.5 msec
Shift lever Suitable position
PBIB0547E
SEC769C

EC-324
[QR (WITH EURO-OBD)]
DTC P1143 HO2S1

WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and ground.
3. Check one of the following with engine speed held at 2,000 rpm
constant under no load.

The maximum voltage is over 0.6V at least 1 time.

The minimum voltage is over 0.1V at least 1 time.
4. If NG, go to EC-324, "
Diagnostic Procedure" .
Diagnostic ProcedureEBS010S8
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Refer to EC-132, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
MBIB0018E
PBIB2021E

DTC P1143 HO2S1
EC-325
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2. RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
>> GO TO 3.
3. 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 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 con-
nector.
5. Make sure that DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-63, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION" .
7. Make sure that DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171. Refer to EC-219, "DTC P0171 FUEL INJECTION SYS-
TEM FUNCTION" .
No >> GO TO 4.
4. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-144, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.Tightening torque: 40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
PBIB0499E
SEF215Z
PBIB0495E

EC-326
[QR (WITH EURO-OBD)]
DTC P1143 HO2S1

5. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-326, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-124, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For circuit, refer to EC-181, "
Wiring Diagram" .
>>INSPECTION END
Component InspectionEBS010S9
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.
3. Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.
4. Hold engine speed at 2,000 rpm under no load during the follow-
ing steps.
5. Touch “RECORD” on CONSULT-II screen.
6. Check the following.

“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” more than 5 times in 10 sec-
onds.
5 times (cycles) are counted as shown in the figure.

“HO2S1 (B1)” voltage goes above 0.6V at least once.

“HO2S1 (B1)” voltage goes below 0.3V at least once.

“HO2S1 (B1)” voltage never exceeds 1.0V.
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 surface such as a concrete floor; use a new one.
SEF646Y
SEF217YA
SEF648Y

DTC P1143 HO2S1
EC-327
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Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool and approved anti-seize lubricant.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and ground.
3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.

The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.

The maximum voltage is over 0.6V at least 1 time.

The minimum voltage is below 0.3V at least 1 time.

The voltage never exceeds 1.0V.
1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V
→ 0 - 0.3V
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 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 and approved anti-seize lubricant.
Removal and InstallationEBS010SA
HEATED OXYGEN SENSOR 1
Refer to EM-25, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .
MBIB0018E