2427499 - H29 STEERING HEAVY WITH POOR RETURN
The Customer complains of the steering being heavy and/or poor response| Results of the tests | ||||
| 1 | TYRE CHECK | All OK | Problems met | Operation | 
|---|---|---|---|---|
| Check the condition and wear of the front tyres, in particular: 
 | Continue to Step 2 | Tyre inflation pressure not correct. | Restore the correct tyre inflation pressure. | |
| One of the tyres worn more than the other, on the inside and/or on the outside | Adjust the steering geometry / toe in. | |||
| 2 | STEERING HEAVINESS UNIFORMITY CHECK | All OK | Problems met | Operation | 
| With the vehicle stationary and the engine not running, check that the heaviness of the steering does not vary from one end of travel position to the other. | Continue to Step 3 | Excessive, constant hardening in both steering directions. | Continue to Step 4 | |
| Heaviness only at some steering points | Continue as instructed See table H10 STEERING HARD | |||
| 3 | STEERING HEAVINESS CHECK | All OK | Problems met | Operation | 
| Check what type of steering rotation resistance is present, in the following order: 
 | Continue to Step 9 | Excessive hardness when steering | Continue to Step 4 | |
| The power assistance does not change from when the ignition is OFF to when the engine is started up. | Continue as instructed See table H30 ELECTRIC STEERING NOT WORKING | |||
| The power assistance does not change when the city button is pressed. | Continue as instructed See table K16 CITY WARNING LIGHT ON | |||
| 4 | STEERING COLUMN CHECK | All OK | Problems met | Operation | 
| Check the hardness of the steering column rotation after having disconnected it from the steering box | Continue to Step 5 | The electric steering column turns stiffly | Continue to Step 6 | |
| The electric steering column turns freely. | Continue as instructed See table H29 STEERING HEAVY WITH POOR RETURN | |||
| 5 | STEERING BOX CHECK | All OK | Problems met | Operation | 
| After having disconnected the steering box from the electric steering column, manually move the front wheels and check the hardening of the steering box. | Continue to Step 6 | Steering box faulty with possible rack hardening and/or tooth/teeth broken and/or bearing and/or pinion broken | Continue as instructed See table H29 STEERING HEAVY WITH POOR RETURN | |
| 6 | CHECK ON EXTENT OF FAULTS | All OK | Problems met | Operation | 
| The hardness and/or return of the steering is even (the EPS system does not assist the return of the steering with the vehicle stationary): check the extent of the problem. | Continue to Step 7 | The heaviness is extensive | Replace the EPS system Op. 4410D20 | |
| 7 | CHECK ON EXTENT OF FAULTS | All OK | Problems met | Operation | 
| Check that there are no impluses at the steering wheel when steering with the vehicle stationary | Continue to Step 9 | There are impulses coming from the steering wheel | Replace the EPS system motor Op. 4410D30 | |
| 8 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation | 
| Check that the fault is no longer present | End of diagnosis | Fault persists | Continue to Step 2 | |