145 - MiTo   1.4 16v TJet   ENGINE IDLING TOO LOW   D012   


 

 

 

Test results

 

1

 

MODE PARAMETERS CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Connect using the Examiner in the engine management control unit and check the value of the following parameters:

Battery voltage

Accelerator pedal

Accelerator position 1 AD/C

Accelerator position 2 AD/C

 

Go to Step 2

 

Battery voltage low

 

Recharge/replace battery

 

Accelerator pedal potentiometers defective

 

Replace the accelerator pedal

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

 

2

 

MOTORISED THROTTLE CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the motorized throttle is working properly, carrying out

 See Test 1056BW Check on the throttle body actuator operation

Check the continuity of the wiring between the engine control unit and the motorised throttle

 

Go to Step 3

 

Motorized throttle defective

 

Replace the motorized throttle

 Op. 1056B14 THROTTLE BODY - R + R

 

Wiring defective

 

Restore correct wiring.

 

3

 

CYLINDER COMPRESSION CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Carry out the cylinder compression test

 Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED

 

Go to Step 5

 

Cylinder compression insufficient

 

Go to Step 4

 

4

 

CAUSE OF INSUFFICIENT COMPRESSION CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Implement

 Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET

to check the valve seal and the condition of the cylinders/piston rings

 

Go to Step 5

 

Valve seal insufficient

 

Overhaul the cylinder head

 Op. 1016E10 SINGLE CYLINDER HEAD - DETACHED - OVERHAUL

 

5

 

CORRECT OPERATION CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the fault is no longer present

 

End of diagnosis

 

The fault persists

 

Replace the engine management control unit

 Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

The customer complains of: Engine idle speed is too low