Nissan Altima 2007-2012 Service Manual: P2118 throttle control motor
Description
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle control motor to make the throttle valve opening angle properly in response to driving condition.
DTC Logic
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 EC-920, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in GI-45, "Circuit Inspection".
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 connector.
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.
3.CHECK THROTTLE CONTROL MOTOR
Refer to EC-921, "Component Inspection".
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 5.
4.CHECK INTERMITTENT INCIDENT
Refer to GI-42, "Intermittent Incident".
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. Go to EC-921, "Special Repair Requirement".
>> INSPECTION END
Component Inspection
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. Go to EC-921, "Special Repair Requirement".
>> INSPECTION END
Special Repair Requirement
1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to EC-565, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement" >> GO TO 2.
2.PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-566, "IDLE AIR VOLUME LEARNING : Special Repair Requirement" >> END
P2101 electric throttle control
function
Description
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the
...
P2119 electric throttle control
actuator
Description
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the
...
Other materials:
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the
condition and the environment when
the incident/malfunction occurred).
>> GO TO 2
2.CHECK DTC WITH BCM AND IPDM E/R
1. Check “Self Diagn ...
Function diagnosis
EPS SYSTEM
System Diagram
CONTROL DIAGRAM
System Description
• The EPS system controls the power steering solenoid valve through the power
steering control unit.
• The valve driving voltage to control the power steering solenoid
valve varies according to the vehicle speed.
OPERATI ...
CVT fluid
RE0F09B
Inspection
CHECKING CVT FLUID
Fluid level should be checked with the fluid warmed up to 50 to 80°C (122 to
176°F). The fluid level check procedure
is as follows:
1. Check for fluid leakage.
2. With the engine warmed up, drive the vehicle in an urban area.
When ambient t ...