First, check:

• the condition of the air intake circuit
• for fuel leaks in the low pressure circuit
• for the presence of water in the diesel

1. Air intake circuit faulty, drainage pipe blocked/distorted

2. Leaks from the low pressure circuit

3. Traces of water in the diesel

1. Replace the exhaust pipe

2. Restore the correct seal.

3. Replace diesel in the tank

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

Check:

• no faults in the engine management control unit;
• no errors on the CAN line between the engine management control unit and the ABS control unit.
• parameter plausibility

1. Switch not correctly adjusted

2. Switch wiring broken

3. Switch defective

1. Adjust the switch

2. Restore wiring continuity

3. Replace the switch

Op. 1060D42 SWITCH ON CLUTCH PEDAL- R. R (DIESEL ENGINES)

Check that the high fuel pressure is correct by carrying out

See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK

Carry out a road test, reproducing the conditions in which the fault occurs.

Check that the fuel supply pressure is correct by carrying out

See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK

1. Pressure not correct: obstructions in the fuel supply pipe.

2. Pressure not correct: tank not sufficiently ventilated.

3. Pressure not correct: electric pump defective.

1. Remove the obstructions in the fuel pipe, replace it if necessary.

2. Restore the tank ventilation

3. Replace electric pump

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

Using the Examiner check that the accelerator pedal is working properly by connecting to the engine management control unit by carrying out

See Test 1068AC ACCELERATOR PEDAL CHECKS

1. Accelerator pedal position incorrect

2. Wiring defective

3. Accelerator pedal sensor defective

1. Restore the seal for the pipes

Restore wiring

2. Replace the accelerator pedal

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

Check:

• for any variations in the flow meter signal through the presence of water in the intake system
• Flow meter wiring defective
• Air flow meter defective
• See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
• Check that the flow meter supply is correct by carrying out
• See Test 1060GS FLOW METER OPERATION CHECK

1. Presence of water in the intake circuit.

2. Wiring defective

3. Air flow meter defective

4. Flow meter supply not correct

1.Eliminate the water penetration and replace the flow meter.

2.Restore correct wiring.

3.Replace flow meter

Op. 1060G10 AIR FLOW METER - R.R.

4.Restore correct power supply

With an Examiner in active diagnosis, check the correct operation of the EGR valve

Check the wiring continuity

Check that the EGR solenoid valve supply is correct by carrying out

See Test 1080CB

1. Wiring between EGR valve and engine management control unit interrupted

2. EGR valve defective

3. Signal from engine management control unit interrupted

1. Restore correct wiring

2. Replace EGR solenoid

Op. 1080C82 E.G.R. - VALVE HEAT EXCHANGER ASSEMBLY - CONNECTOR PIPES - R.R.

3. Replace the engine control unit

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R

Using the Examiner check that the injectors are working properly by carrying out

See Test

Check the wiring continuity

See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT

1. Injectors defective

2. Injector wiring defective

1. Replace the injectors

Op. 1060F10

2. Restore correct wiring.

Replace the high pressure pump

Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R.

Replace the engine management control unit

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R