312000561 - D012 ENGINE IDLING TOO LOW
The customer complains that: Engine idle speed is too low| Test results | ||||
| 1 | MODE PARAMETERS CHECK | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Connect using the Examiner in the engine control unit and Check the value of the following parameters:
| Move on to Step 2 | 1. Battery voltage low2. Accelerator pedal potentiometers defective | 1. Recharge/replace battery2. Replace the accelerator pedalOp. 1068A14 | |
| 2 | MOTORIZED THROTTLE CHECK | All OK | Problems encountered | Operation |
| Check that the motorized throttle is working properly, carrying out See Test 1056BW THROTTLE BODY ACTUATOR OPERATION CHECKCheck the continuity of the wiring between the engine control unit and the motorized throttle See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT | Move on to Step 3 | 1. Motorized throttle defective2. Wiring defective | 1. Replace the motorized throttleOp. 1056B14 2. Restore correct wiring. | |
| 3 | CYLINDER COMPRESSION CHECK | All OK | Problems encountered | Operation |
| Carry out the cylinder compression checkOp. 0520G15 | Move on to Step 4 | Cylinder compression insufficient | Move on to Step 5 | |
| 4 | CHECK THE CAUSE OF THE INSUFFICIENT COMPRESSION | All OK | Problems encountered | Operation |
| Carry outOp. 1016C10 to check the valve seal and the condition of the cylinders/piston rings | Move on to Step 5 | Valve seal insufficient | Overhaul the cylinder head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - 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 | |