Electronic steering lock check
- Make
- Fiat
- Model
- Croma Factory Service Manual
- Year
- 2005–2010
- Section
- Special accessories › Electronic steering lock check
ELECTRONIC STEERING LOCK CHECK
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Connect the diagnostic instrument in Voltmeter mode with the positive probe to Pin 1 and the negative earthed to Pin A4 of the steering lock control unit See M089 STEERING LOCK CONTROL UNIT (NBS) the direct voltage reading should be 12 Volt. | Restore wiring continuity |
| 2 | Insert a key in the ignition and turn to STOP. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin A6 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed and read a battery voltage of approximately 12 Volts. Move on to Step 4 | Move on to Step 3 |
| 3 | Check for wiring continuity between Pin 12 of the ignition device and control unit Pin A6 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 4 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin B5 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Turn the ignition ON and check for a voltage of approximately 12 Volts. Move on to Step 6 | Continue as instructed in the |
| 5 | Check for wiring continuity between Pin 6 of the ignition device and control unit Pin B5 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 6 | Turn the ignition key OFF. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C5 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Depress the brake pedal. Turn the ignition key to START. Check for a battery voltage signal of 12 Volts. Return the key to ON and check for a battery voltage signal of approximately 0 volts Move on to Step 8 | Move on to Step 7 |
| 7 | Check for wiring continuity between Pin 5 of the ignition device and control unit Pin C5 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 8 | Turn the ignition key OFF. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C6 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Depress the brake pedal Turn the key to START. Check for a voltage signal of approximately 0 Volts. When the key is returned to START, the voltage should be 12 Volts. Move on to Step 10 | Move on to Step 9 |
| 9 | Check for wiring continuity between Pin 11 of the ignition device and control unit Pin C6 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 10 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin B1 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed and read a battery voltage of approximately 12 Volts. | Replace the steering lock node |
| 11 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C8 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed and read a battery voltage of approximately 12 Volts. | Replace the steering lock node |
| 12 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C4 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Press the brake pedal and the battery voltage reading should be 12 Volts. Release the brake pedal and the voltage reading should be 0 volts. Move on to Step 15 | Move on to Step 13 |
| 13 | Check for wiring continuity between brake pedal switch Pin 4 and control unit Pin C4 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Check the power supply is correct to the brake pedal switch and restore if necessary. Move on to Step 14 |
| 14 | Check the diagnostic instrument in parameter mode to ensure the brake pedal switch is operating correctly. | Replace the switch |
| 15 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C7 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Press the brake pedal and the battery voltage reading should be 0 Volts. Release the brake pedal and the voltage reading should be 12 volts. Move on to Step 18 | Move on to Step 16 |
| 16 | Check for wiring continuity between brake pedal switch Pin 4 and control unit Pin C4 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Check the power supply is correct to the brake pedal switch and restore if necessary. Move on to Step 17 |
| 17 | Check the diagnostic instrument in parameter mode to ensure the brake pedal switch is operating correctly. | Replace the switch |
| 18 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin B4 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Depress the brake pedal. Press the gear selection lever button, move the lever to different positions and check the voltage values are as shown in the following table:
Start-up must be possible in positions P and N but disabled in the other positions. The test can be considered over | Move on to Step 19 |
| 19 | Check for wiring continuity between Pin 1 of the automatic transmission solenoid unit See L050 AUTOMATIC TRANSMISSION SOLENOID VALVES and Pin B4 of the steering lock and repair if necessary | Replace the gearbox solenoid unit Op. 2130B39 GEAR SELECTION SOLENOID UNIT R R WITH SOLENOID UNIT COVER REMOVED |
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Connect the diagnostic instrument in Voltmeter mode with the positive probe to Pin 1 and the negative earthed to Pin A4 of the steering lock control unit See M089 STEERING LOCK CONTROL UNIT (NBS) the direct voltage reading should be 12 Volt. | Restore wiring continuity |
| 2 | Insert a key in the ignition and turn to STOP. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin A6 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed and read a battery voltage of approximately 12 Volts. Move on to Step 4 | Move on to Step 3 |
| 3 | Check for wiring continuity between Pin 12 of the ignition device and control unit Pin A6 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 4 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin B5 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Turn the ignition ON and check for a voltage of approximately 12 Volts. Move on to Step 6 | Continue as instructed in the |
| 5 | Check for wiring continuity between Pin 6 of the ignition device and Pin B5 of the control unit [EL_M089] and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 6 | Disconnect the wiring connector from the control unit See M089 STEERING LOCK CONTROL UNIT (NBS) Connect the diagnostic instrument in Ohmmeter mode with one probe between Pin A5 of the control unit See M089 STEERING LOCK CONTROL UNIT (NBS) and the earth. Press the clutch pedal and check for an earth signal. Move on to Step 8 if no clutch signal is detected by the steering lock node, the car can still be started up by pressing the brake pedal | Move on to Step 7 |
| 7 | Check the continuity of the wiring between Pin 4 of the clutch pedal switch and control unit Pin A5 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK If necessary, replace the clutch pedal switch Op. 1060G42 SWITCH ON CLUTCH PEDAL - R.R. (JTD ENGINES) The test can be considered over | Replace the steering lock node |
| 8 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C5 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Press the clutch pedal. Turn the ignition key to START. Check for a battery voltage signal of 12 Volts. Move on to Step 10 | Move on to Step 9 |
| 9 | Check for wiring continuity between Pin 5 of the ignition device and control unit Pin C5 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 10 | Turn the ignition key OFF. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C6 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Press the clutch pedal. Turn the ignition key to START. Check for a battery voltage signal of 12 Volts. Move on to Step 12 | Move on to Step 11 |
| 11 | Check for wiring continuity between Pin 11 of the ignition device and control unit Pin C6 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Continue as instructed in the |
| 12 | Turn the ignition key to the ON position. Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin B1 See M089 STEERING LOCK CONTROL UNIT (NBS) and the negative earthed and read a battery voltage of approximately 12 Volts | Replace the steering lock node |
| 13 | Turn the ignition key to the ON position. Connect the tester in Voltmeter mode with the positive probe to control unit Pin A1 See M089 STEERING LOCK CONTROL UNIT (NBS) and the negative earthed and read a battery voltage of approximately 12 Volts | Replace the steering lock node |
| 14 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C8 See M089 STEERING LOCK CONTROL UNIT (NBS) and the negative earthed and read a battery voltage of approximately 12 Volts | Replace the steering lock node |
| 15 | Connect the diagnostic tester in Voltmeter mode with the positive probe to control unit Pin C4 See M089 STEERING LOCK CONTROL UNIT (NBS) and negative earthed. Press the brake pedal and the battery voltage reading should be 0 Volts. Release the brake pedal and the voltage reading should be 12 volts. The test can be considered over | Move on to Step 16 |
| 16 | Check for wiring continuity between brake pedal switch Pin 4 and control unit Pin C4 See M089 STEERING LOCK CONTROL UNIT (NBS) and repair if necessary See E7065 ELECTRIC STEERING LOCK The test can be considered over | Check the power supply is correct to the brake pedal switch and restore if necessary. Move on to Step 17 |
| 17 | Check the diagnostic instrument in parameter mode to ensure the brake pedal switch is operating correctly. | Replace the switch |
| 18 | Replace the steering lock node |
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