145 - MiTo   1.4 16v TJet   ENGINE STARTS WITH DIFFICULTY   B013   


 

 

 

Test results

 

0

 

PRELIMINARY CHECKS

 

All OK

 

Problems encountered

 

Operation

 

 

First check:- air filter condition;- air intake circuit condition;- that the exhaust pipe is not obstructed

 

Move on to Step 1

 

Obstruction in the air intake circuit

 

Eliminate the problem, if necessary, replace the filter element

 Op. 1048A14 AIR FILTER FILTER ELEMENT - REPLACE

 

Air intake via the intake manifold/throttle body seal

 

Restore the correct seal.

 

Exhaust pipe blocked

 

Restore the exhaust pipe to correct operation.

 

1

 

CHECK USING DIAGNOSTIC EQUIPMENT

 

All OK

 

Problems encountered

 

Operation

 

 

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check:

- that there are no faults in the engine management control unit;

- parameter plausibility

 

End of diagnosis

 

Error detected in the control unit

 

Continue following the instructions on the diagnostic equipment

 

Parameter not consistent

 

Continue following the instructions on the diagnostic equipment

 

2

 

FUEL PRESSURE TEST

 

All OK

 

Problems encountered

 

Operation

 

 

Check fuel supply pressure by carrying out the following tests:

 See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK

 See Test 1056BI FUEL SYSTEM RETURN PRESSURE CHECK

 See Test 1040AA CHECK ON POWER SUPPLY VOLTAGE AND CURRENT UPTAKE

 

Move on to Step 3

 

Fuel pressure too low: pipes obstructed

 

Eliminate the constrictions

 

Fuel pressure too low: pump defective

 

Replace the pump assembly

 Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R

 

3

 

IGNITION SYSTEM CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Inspect the spark plugs and check they are working properly

Check for any defects in the spark plug high voltage cables

Check the operation of the ignition coils by carrying out

 See Test 5510OB IGNITION COIL RESISTANCE CHECK

 See Test 5510CI CHECK ON OPERATION OF IGNITION COILS

 See Test 5510CE IGNITION CONTROL SIGNAL CHECK

 

Move on to Step 4

 

Spark plug defective

 

Replace spark plug

 Op. 5510D10 SPARK PLUGS - R+R

 

High voltage cable connection leaking

 

Replace HV cable

 

High voltage cable connection slack

 

Tighten HV cable correctly

 

Ignition coil defective.

 

Replace ignition coils

 Op. 5510C14 IGNITION COIL/S - R.R.

 

4

 

INJECTOR CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Using the Examiner in active diagnosis, check that the injectors are working properly by carrying out the

 See Test 1056BA INJECTOR OPERATION CHECK

Check that the injector needle seal is correct

 

Move on to Step 5

 

Injector stuck/incorrectly adjusted

 

Replace the injector

 Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT

 

Connections not correct

 

Restore the correct connections

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

 

Injector seal not intact

 

Replace the injectors

 Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT

 

5

 

ENGINE COOLANT TEMPERATURE SENSOR CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the sensor operates correctly by carrying out

 See Test 1056BC Engine coolant temperature sensor operation check

 

Move on to Step 6

 

Temperature sensor defective

 

Replace the sensor

 Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R

 

Connections not correct

 

Restore the correct connections

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

 

6

 

ACCELERATOR PEDAL CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the accelerator pedal is working correctly

 

Move on to Step 7

 

Accelerator pedal potentiometer defective.

 

Replace the accelerator pedal

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

 

Connections not correct.

 

Restore the correct connections

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

 

7

 

MOTORISED THROTTLE CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the motorized throttle is working properly by carrying out the

 See Test 1056BW Check on the throttle body actuator operation

 

Move on to Step 8

 

Motorised throttle defective

 

Replace the motorised throttle

 Op. 1056B14 THROTTLE BODY - R + R

 

Connections not correct.

 

Restore the correct connections

 See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

 

8

 

TIMING CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the timing system timing is correct

 

Move on to Step 9

 

Timing system timing not correct

 

Restore the correct timing.

 

9

 

CYLINDER COMPRESSION CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Perform the cylinder compression test by carrying out the

 Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS

 

Move on to Step 11

 

Cylinder compression insufficient

 

Move on to Step 10

 

10

 

CAUSE OF INSUFFICIENT COMPRESSION CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

R & R head to check valve seal

Check condition of cylinders/piston rings

 

Move on to Step 11

 

Valve seal insufficient

 

Overhaul the head

 Op. 1016E10 SINGLE CYLINDER HEAD - DETACHED - OVERHAUL

 

Cylinders/piston rings worn

 

Restore the correct seal.

 

11

 

ENGINE CONTROL UNIT CHECK

 

All OK

 

Problems encountered

 

Operation

 

 

Check that the engine control unit is working properly

 

End of diagnosis

 

Engine management control unit defective.

 

Replace the engine management control unit

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

The engine starts with difficulty and only after repeated attempts. When the key is turned the instruments light up as normal, the starter motor turns, but the engine is difficult to start.