How to repair if check engine light on at the same time no acceleration

How to repair if check engine light on at the same time no acceleration.

Model: Tucson/Ix35(LM,EL)

Year Model:L 2010

Fuel: Gasoline

Displacement:2400cc

Subject: Check engine light on at the same time no acceleration

2010  G 2.4 DOHC  Engine  Unleaded GEN  P0121 Throttle/Pedal Position Sensor/Switch \'A\' Circuit Range/Performance
 

Study Component Location

 

Study General Description

Study The Electronic Throttle Control(ETC) system consists of the throttle body, Throttle Position Sensor(TPS) 1&2 and Accelerator Position Sensor(APS) 1&2. TPS1&2 are sharing the same source voltage and ground. Study The throttle valve opening is control by throttle motor which is controlled by Engine Control Module(PCM).Study The opposite position indicator shows inverted signal characteristics. TPS1 output voltage increases smoothly in proportion with the throttle valve opening angle after starting. TPS2 output voltage decreases in inverse proportion with the throttle valve opening angle after starting. StudyTPS provides feedback to the PCM to control the throttle motor in order to control the throttle valve opening angle properly in response to the driving condition.

Study DTC Description

Study The DTC P0121 is set when the intake manifold model filtered reduced area controller is out of range in low or high load.  

DTC Detecting Condition

Study Item
Detecting Condition
Possible Cause

Study DTC Strategy

• Plausibility check between TPS1 and TPS2

• Faulty TPS1

• Poor connection or damaged harness

Enable Conditions

• No engine stop and engine start

• No TPS adaptation request

• No relevant failure

Threshold Value

• An absolute value of TPS2 - TPS1 > 7.6%

Diagnostic Time

• 0.3 sec.

MIL On Condition

• 1 Driving Cycle

Limp-Home

• Study Forced limited power mode : When the DTC is set, the PCM reduces engine torque by 25% of normal value.

•Study The PCM uses TPS2 signal to monitor the controlled opening angle of the throttle valve.

 

Terminal and Connection Inspection

1.Many malfunctions in the electrical system are caused by poor harness(es) 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?

▶ Study Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Study Go to "Component Inspection" procedure.

 

Component Inspection

1.Study Select 'Actuation Test' mode and execute 'ETC motor' item.

▶Study During 'ETC Motor' test, TPS1 and TPS2 show symmetrical movements.

2.Is the waveform normal?

▶ Study Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

▶ Study Check ETC for contamination, deterioration, or damage. Substitute with a known-good ETC and check for proper operation. If the problem is corrected, replace TPS and then go to "Verification of Vehicle Repair" procedure.

It is necessary to perform the TPS adaptation procedure after the ETC assembly or PCM replacing.

■Study TPS adaptation procedure

Ignition "OFF" and then "ON" without cranking. Wait for 10 seconds under enable conditions.

→ Enable conditions : Battery >10V & Intake Air Temp. >5.3°C(41.5°F) & 5.3°C(41.5°F) <Engine CoolantTemp. <99.8°C(211.6°F)

 

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