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Sensors
Diesel Engine
| SENSOR TYPE | NORMAL SYMPTOMS | HOW TO TEST |
|---|---|---|
| CRANKSHAFT (CPS) | NON START, OCCASIONALLY MAY CUT-OUT AND RESTART | |
| CAMSHAFT SENSOR | NON START | |
| COOLANT SENSOR | MAY BE NONSTART IF SENSOR TELLS ECU WRONG TEMPERATURE | |
| AIR FLOW SENSOR | WON'T EFFECT RUNNING ONLY USED TO MONITOR EGR VALVE ON DIESEL ENGINES | |
| THROTTLE PEDAL | WON'T REV, MAY BE OK AGAIN AFTER RE-STARTING | |
| FUEL RAIL PRESSURE | PROBABLY WON'T START WILL KNOCK IF DOES | |
| CLUTCH PEDAL | ENGINE MAY JOLT AFTER GEAR CHANGE | |
| AIR TEMPERATURE | MAY UPSET STARTING AND RUNNING SLIGHTLY | |
| ATMOSPHERIC | MAY UPSET STARTING AND RUNNING SLIGHTLY |
Petrol Engine
| SENSOR TYPE | NORMAL SYMPTOMS | HOW TO TEST |
|---|---|---|
| CRANKSHAFT (CPS) | NON START, OCCASIONALLY MAY CUT-OUT AND RESTART | |
| CAMSHAFT SENSOR | NORMALLY NONSTART, ECU MAY GUESS CAMSHAFT POSOSITON | |
| COOLANT SENSOR | MAY BE NONSTART IF SENSOR TELLS ECU WRONG TEMPERATURE | |
| AIR FLOW SENSOR | NORMALLY WILL START ECU WILL USE DEFALT, WILL RUN ROUGH | |
| MANIFOLD ABSOLUTE PRESSURE (MAP) | NORMALLY WILL START ECU WILL USE DEFALT, WILL RUN ROUGH | |
| THROTTLE PEDAL | WON'T REV, MAY BE OK AGAIN AFTER RE-STARTING | |
| AIR TEMPERATURE | MAY UPSET STARTING AND RUNNING SLIGHTLY | |
| ATMOSPHERIC | MAY UPSET STARTING AND RUNNING SLIGHTLY | |
| KNOCK (PINKING) | MAY LOOSE POWER IF ECU RETARDS IGNITION TIMING |
