312000585 - H025 NO ELECTRIC STEERING POWER ASSISTANCE WITH FAILURE WARNING LIGHT ON
 | There is a noticeable hardening in the steering (in both directions) with no assistance and the failure warning light is onThe electric steering is coaxial and integral with the steering column. The failure warning light should go off with the engine running. |
| Test results | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Connect the Examiner diagnostic equipment and check, in Electric Steering Node Parameter Reading mode, that there are no errors and that the parameters are present. | Move on to Step 9 | 1. Impossible to connect to the control unit.2. Presence of errors.3. Low battery voltage parameter reading. | 1. Move on to Step 22. Move on to Step 63. Move on to Step 8 | |
| 2 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
| Check the electrical power supply to the Electric Steering Node is correct. With the panel off, check for a voltage of around 12.5V at the blue power supply connector. With the panel on, check for the same voltage at PIN 1 of the black 10-way connector. | Move on to Step 3 | 1. Battery voltage faulty.2. Fault in positive electrical supply and/or earth. | 1. Move on to Step 82. Replace the component causing the problem (in the case of a fuse, find out what caused the damage). | |
| 3 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Check the electrical connections for the Electric Steering Node and the Body Computer, searching for any loose connections creating occasional breaks in the power supply. In particular, make sure that every PIN is correctly connected and fitted in place.Take GREAT care over the positive battery terminal leading to the 70 A fuse for the electric steering (left terminal). If it is secured but NOT correctly fitted in place, disconnect it and fasten it correctly. | Move on to Step 4 | Electrical connections not operational. | Renew the damaged electrical connections. | |
| 4 | CHECK FOR NO VOLTAGE | All OK | Problems encountered | Operation |
| Start up the engine and then switch it off. At this point, with the panel off, check that the voltage at PIN 1 of the black 10-way connector is effectively =0. | Move on to Step 5 | The voltage at PIN 1 with the panel off is more than 0 V. | DO NOT replace the Electric Steering Assembly. Electrical equipment problem. | |
| 5 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Recheck the possibility of connecting to the Electric Steering Node using the Examiner. | Move on to Step 1 | Impossible to connect to the control unit. | Replace the electric steering unit. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R | |
| 6 | ERRORS CHECK | All OK | Problems encountered | Operation |
Check for the presence of one or more of the following errors using the Examiner in Electric Steering Node mode:
| End of diagnosis | 1. Error C1214 detected, incorrect end of line calibration (there is no lack of power assistance).2. Internal control unit error detected (C1001).3. Steering column torque/position sensor fault (C1002).4. Position sensor not calibrated (C1008, there is no lack of power assistance).5. Services battery fault (C1200, there is no lack of power assistance).6. Body Computer node / vehicle speed fault (C1003, U1700 or U1701, there is no lack of power assistance).7. EPS Node Missing (U0001) | 1. DO NOT replace the Electric Steering assembly. This is not an error but the normal system configuration. If the error is still present, check the vehicle proxy settings but do not replace the Electric Steering unit.2. Replace the electric steering unit. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R 3. Move on to Step 104. DO NOT replace the Electric Steering Assembly. Move on to Step 14.5. DO NOT replace the Electric Steering Assembly. Move on to Step 8.6. DO NOT replace the Electric Steering Assembly. Move on to Step 7.7. DO NOT replace the Electric Steering assembly. CAN problem.Move on to Step 7. | |
| 7 | PRACTICAL TEST | All OK | Problems encountered | Operation |
| Check and clean the earths. Check for the presence of similar errors in other devices on the vehicle. Check operation of the Engine management and Body Computer Node Check the CAN connections.Delete the error(s) and carry out a road test, checking that the fault is no longer present. | End of diagnosis | The error does not occur again | DO NOT replace the Electric Steering assembly. Vehicle signals problem. | |
| 8 | BATTERY ELECTRICAL CHECK | All OK | Problems encountered | Operation |
Check the following, in order:
| End of diagnosis | 1. Services battery voltage fault2. Loose connections detected in the Electric Steering Node power supply circuit | 1. Restore the correct operation of the battery.2. Restore the correct wiring. | |
| 9 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Check the electrical connections for the Electric Steering Node, searching for any loose connections creating occasional breaks in the power supply.In particular, make sure that every PIN is correctly connected and fitted in place. | End of diagnosis | Electrical connections not operational. | Renew the damaged electrical connections. | |
| 10 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Using the Examiner in Electric Steering Node mode, after having confirmed the presence of the error, go to the error parameters screen and identify the Temporary Electric Steering Error item. | Move on to Step 11 | 1. Temporary Electric Steering Error 23.2. Temporary Electric Steering Error 19.3. Temporary Electric Steering Error 32 or 25.4. Temporary Electric Steering Error 99 (there is no lack of power assistance). | 1. Move on to Step 112. Move on to Step 123. Move on to Step 11.4. DO NOT replace the Electric Steering Unit.Possible incorrect installation of system in vehicle. Check that the intermediate shaft is properly installed in the correct angular position. | |
| 11 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Check that the leads are correctly fastened at the battery terminals, in particular the earth lead at the negative pole.Also check that the 8-way connector is correctly fitted and securely fastened. | Move on to Step 12 | 1. Wiring or connections defective.2. If no faults are detected in the wiring and the connections. | 1. Restore the correct operation of the wiring and move on to Step 132. Replace the electric steering unit. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R | |
| 12 | ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Thoroughly clean the Electric Steering Node earths, also checking the condition of the wiring and making sure that the 8-way connector is correctly inserted and securely fastened. | Move on to Step 13 | The problem occurs again after the electrical checks | Replace the electric steering unit. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R | |
| 13 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| After having cleaned the earths and checked the wiring, with the Examiner in Electric Steering Node mode, delete the error and carry out a road test. | End of diagnosis | The problem occurs again | Replace the electric steering unit. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R | |
| 14 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Using the Examiner, in Electric Steering Node mode, select the Position sensor calibration option and check the result of the operation. | End of diagnosis | Impossible to calibrate the position sensor | DO NOT replace the Electric Steering Unit. Possible incorrect installation of system in vehicle. Check that the intermediate shaft is correctly fitted, above all if it has recently been replaced or disconnected.Check that it is fitted in the correct angular position. Using the Examiner, display the Steering angle position item. With the steering wheel straight and the wheels straight the value should be =0°. | |