Workshop Manuals Factory service & repair Fiat
Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Engine not feeling accelerator pedal pressure

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Engine › Engine not feeling accelerator pedal pressure
Fault diagnosisEngine not feeling accelerator pedal pressure

ENGINE NOT FEELING ACCELERATOR PEDAL PRESSURE

1.2 8v, 1.4 16v

The customer complains that: The engine does not react when the accelerator pedal is operated

Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation
Check that the air intake/vacuum circuit is working properlyMove on to Step 1Intake system not sealedRestore the correct seal
1ERROR CHECKAll OKProblems encounteredOperation
Check for the presence of any faults by connecting to the engine management control unit using the ExaminerMove on to Step 2Presence of errorsContinue as instructed by the diagnostic equipment
2IGNITION SYSTEM CHECKAll OKProblems encounteredOperation

Inspect the spark plugs and check they are working properly. Check the operation of the ignition coils by carrying out the

See Test 5510CI IGNITION COIL OPERATION CHECK

, the

See Test 5510CE IGNITION CONTROL SIGNAL CHECK

and the

See Test 5510OA IGNITION COIL RESISTANCE CHECK

Move on to Step 3

1. Spark plugs defective

2. Coil defective

1. Replace spark plugs

Op. 5510D10 SPARK PLUGS - R+R

2. Replace coils

Op. 5510C14 IGNITION COIL/S - R.R.

3ACCELERATOR PEDAL CHECKAll OKProblems encounteredOperation

Using the Examiner, check the correct voltage values of the accelerator pedal potentiometers.

Check that the accelerator pedal potentiometer is working properly

Move on to Step 4

Accelerator pedal potentiometer defective

Potentiometer wiring defective

Replace the accelerator pedal

Op. 1068A14

Restore correct wiring.

4MOTORIZED THROTTLE CHECKAll OKProblems encounteredOperation

Check that the motorized throttle is working properly, carrying out

See Test 1056BW THROTTLE BODY ACTUATOR OPERATION CHECK

End of diagnosis

1. Motorized throttle defective

2. Connections not correct

1. Replace the motorized throttle

Op. 1056B14

2. Restore the correct connections

See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

1.3 Multijet

The customer complains that: The engine does not react when the accelerator pedal is operated

Test results
0Preliminary checksAll OKProblems encounteredOperation
Check that the air intake/vacuum circuit is working properly.Move on to Step 1Intake system not sealedRestore the correct seal.
1Errors checkAll OKProblems encounteredOperation
Check that there are no errors by connecting to the engine management control unit using the ExaminerMove on to Step 2Presence of errorsContinue as instructed by the diagnostic equipment.
2ACCELERATOR PEDAL CHECKAll OKProblems encounteredOperation

Using the Examiner, check the voltage values for the accelerator pedal potentiometers are correct.

Check that the accelerator pedal potentiometer is working properly, carrying out

See Test 1068AC ACCELERATOR PEDAL CHECKS

End of diagnosis

1. Accelerator pedal potentiometer defective.

2. Potentiometer wiring defective

1. Replace the accelerator pedal

Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R

2. Restore the correct wiring.

Parts & tools for this job For 2007 Fiat 500

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