199003091 - P0685 Main relay
 | This error is indicated if the main relay is deactivated too quickly (with detail of unexpected activation) or is turned off too late or does not go off at all (with detail of actuator postponement). If the main relay is not switched off after the control units have been inactive for a while, a counter is activated in the engine management control unit. If the main relay is not switched off after an internally programmed period, the fault code is issued. If the main relay switches off too quickly during a period of inactivity for the control unit, the fault codes will not be memorized. |
| Test results | ||||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation | ||
|---|---|---|---|---|---|---|
| Check that the error detail is not unexpected activation | Move on to Step 3 | The detail is unexpected activation | Move on to Step 1 | |||
| 1 | ERROR DELETION | All OK | Problems encountered | Operation | ||
Cancel the errors present and turn the ignition key OFF.Wait for the engine management control unit to switch off (min. 20 secs.).
| Move on to Step 2 | - | - | |||
| 2 | ERRORS CHECK | All OK | Problems encountered | Operation | ||
| Drive the vehicle in different driving conditions (engine speed and engine load) for a long stretch.Listen out for any unusual noises and other system irregularities.At the end of the road test, check that none of the following errors is present using the diagnostic equipment:- P0335 with "Signal invalid" detail- P0606- P1618 | End of diagnosis | The engine is not running smoothly | Proceed as instructed in the See table D003 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION) | |||
| The engine is losing power | Proceed as instructed in the See table D004 ENGINE NOT RUNNING SMOOTHLY | |||||
| The engine does not produce maximum performance | Proceed as instructed in the See table D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE | |||||
| The engine response is poor | Proceed as instructed in the See table D016 POOR ENGINE RESPONSE | |||||
| There is engine knock | Proceed as instructed in the See table S003 ENGINE KNOCKING | |||||
| Error P0335 is present | Proceed as instructed in the See Test 1060GI CHECK ENGINE SPEED | |||||
| Error P0606 is present | Proceed as instructed in the See Test 1060GK CHECK CONTROL UNIT SOFTWARE AND HARDWARE | |||||
| Error P1618 is present | Proceed as instructed in the See Test 1060GL CHECK OPERATION OF MAIN ENGINE CONTROL UNIT RELAY | |||||
| 3 | MAIN RELAY OPERATION CHECK | All OK | Problems encountered | Operation | ||
| Check that the main relay is working properly by carrying out the test See Test 1060GL CHECK OPERATION OF MAIN ENGINE CONTROL UNIT RELAY | End of diagnosis | |||||