Nissan March K13. Manual — part 246
P1128 THROTTLE CONTROL MOTOR
EC-445
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
C
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EC
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P1128 THROTTLE CONTROL MOTOR
DTC Logic
INFOID:0000000005886568
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 2 seconds.
2.
Start engine and let it idle for 5 seconds.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005886569
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect electric throttle control actuator harness connector.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK THROTTLE CONTROL MOTOR
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1128
Throttle control motor
circuit short
ECM detects short in both circuits between
ECM and throttle control motor.
• Harness or connectors
(Throttle control motor circuit is shorted.)
• Electric throttle control actuator
(Throttle control motor)
Electric throttle control actuator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F29
5
F7
1
Not existed
4
Existed
F29
6
F7
1
Existed
4
Not existed
EC-446
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
P1128 THROTTLE CONTROL MOTOR
Refer to
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
CHECK INTERMITTENT INCIDENT
Refer to
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness or connectors.
5.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator.
2.
Perform
XX-XX, "*****"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005888562
1.
CHECK THROTTLE CONTROL MOTOR
1.
Disconnect electric throttle control actuator harness connector.
2.
Check resistance between electric throttle control actuator terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator.
2.
Perform
XX-XX, "*****"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000006037448
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform throttle valve closed position learning. Refer to
.
>> GO TO 2
2.
PERFORM IDLE AIR VOLUME LEARNING
Perform idle air volume learning. Refer to
.
>> END
Terminals
Resistance [at 25
°
C (77
°
F)]
5 and 6
Approx. 1 - 15
Ω
P1171 INTAKE ERROR
EC-447
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
C
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P1171 INTAKE ERROR
DTC Logic
INFOID:0000000006044874
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait atle-
ast 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine and wait at least 5 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006044875
1.
CHECK INTAKE AIR LEAK
1.
Start engine and run it at idle.
2.
Listen for an intake air leak after the air cleaner element.
Is intake air leak detected?
YES
>> GO TO 2.
NO
>> Repair or replace.
2.
CHECK VACUUM HOSE
Check intake manifold vacuum hoses for clogging or disconnection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK MAP SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect manifold absolute pressure sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between MAP sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1171
Intake error
A high voltage from the sensor is sent to ECM
under light load driving condition.
• Harness or connectors
(The manifold absolute pressure
sensor circuit is open or shorted.)
• Manifold absolute pressure
• Intake air leaks
• Vacuum hoses
MAP sensor
Ground
Voltage (V)
Connector
Terminal
F50
2
Ground
Approx. 5
EC-448
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 2)]
P1171 INTAKE ERROR
4.
CHECK MAP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between MAP sensor harness connector and ECM harness connector.
4.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK MAP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between MAP sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK MAP SENSOR
Check map sensor. Refer to
EC-402, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace MAP sensor.
7.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-33, "Intermittent Incident"
.
>> INSPECTION END
MAP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F50
4
F46
56
Existed
MAP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F50
1
F46
51
Existed
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