Throttle Actuator Control Module Performance // Improper Motor Current-ETS
DTC P2118 THROTTLE ACTUATOR CONTROL MODULE PERFORMANCE // IMPROPER MOTOR CURRENT-ETSComponent Location:
COMPONENT LOCATION
GENERAL DESCRIPTION
The ETSCM(Electronic Throttle System Control Module) is integrated with PCM(Powertrain Control Module). Therefore, Make sure that location of ETS Module is changed. The ETS(Electronic Throttle System) is the throttle body whose throttle angle is controlled by control module. It consists of ETS-motor, Accelerator Position Sensor(APS),Throttle Position Sensor(TPS) and Limp home valve. After calculating throttle valve target opening value from signals such as APS and other input values, the PCM controls ETS motor to meet the throttle valve target opening value. TPS is mounted on throttle body assembly and detects the opening angle of the throttle valve. The TPS is a variable resistor(potentiometer) whose characteristic is that the resistance changes according to throttle position angle. TPS 1 and TPS 2 signals are used to monitor PCM's throttle valve target opening value's activation. TPS1's output signal is the main signal to calculate the target value for opening throttle valve and to decide whether TPS2 is normal or not. TPS2's output signal is the sub signal to decide whether TPS1 is normal or not. And if TPS1's signal is abnormal, TPS2's output signal is used as the main signal.
DTC DESCRIPTION
DTC P2110/P2118 is set if the difference between actual ETS motor current and target ETS motor current is higher than 3A.
DTC Detecting Condition:
DTC DETECTING CONDITION
Specification:
SPECIFICATION
Schematic Diagram:
SCHEMATIC DIAGRAM
Signal Waveform & Data:
SIGNAL WAVEFORM & DATA
ACTUATOR TEST MODE
1. Connect scantool to Data Link Connector(DLC).
2. Ignition "ON" & Engine "OFF".
3. Select "ACTUATION TEST" on scantool.
4. Using the scantool, operate ETS motor by force
5. Does the ETS motor operate well?
YES: Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
NO: Go to "W/Harness Inspection" procedure
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES: Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO: Go to "Control Circuit Inspection" procedure
CONTROL CIRCUIT INSPECTION
1. Check for open in harness
1. Ignition "OFF"
2. Disconnect ETS motor and PCM connectors
3. Measure resistance between terminals "1" of ETS motor harness connector and "Aid" of PCM harness connector.
4. Measure resistance between terminals "2" of ETS motor harness connector and "A9" of PCM harness connector.
5. Measure resistance between terminals "3" of ETS motor harness connector and "A2" of PCM harness connector.
Specification : Approx. below 1 Ohm
6. Is the measured resistance within specifications?
YES: Go to "Component Inspection" procedure
NO: Check for open in control harness. Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
COMPONENT INSPECTION
1. Check ETS motor
1. Ignition "OFF"
2. Disconnect ETS motor connector
3. Measure resistance between terminals "1" and "2" of the ETS motor harness connector.
4. Measure resistance between terminals "1" and "3" of the ETS motor harness connector.
5. Measure resistance between terminals "2" and "3" of the ETS motor harness connector.
Specification: Approx. 0.6 - 1.5 Ohm ("1" --> "2")
Approx. 0.6 - 1.5 Ohm ("1" --> "3")
Approx. 0.6 - 1.5 Ohm ("2" --> "3")
NOTE: Difference between each phase resistance should be less than 0.5 Ohm
6. Is the ETS motor resistance within specifications?
YES: Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle Repair" procedure.
NOTE: If PCM needs to be replaced, do "ETS Initialization" after it is replaced.
NO: Check ETS motor for contamination,deterioration, or damage. Substitute with a known-good ETS motor and check for proper operation. If the problem is corrected, replace ETS motor and then do "ETS Initialization". And go to "Verification of Vehicle Repair" procedure.
NOTE:
Procedure of ETS Initialization
1. Erase the trouble codes on PCM
2. Turn the ignition key on less than 1 second and turn it off(Do not start the engine)
3. Turn the ignition key off and keep this condition until the main relay is turned off.(It will takes 10 seconds)
4. Turn ignition key on more than 1 second to record the throttle motor position on the EEPROM.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Monitor and record the Freeze Frame Data for the Diagnostic Trouble Code(DTC) which has been diagnosed.
2. Using a Scantool, Clear the DTCs.
3. Operate the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Monitor that all readiness test have been verified as "Complete"
5. Are any DTCs present ?
YES: Go to the applicable troubleshooting procedure.
NO: System is performing to specification at this time.