| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Check that all four doors are properly shut. | Move on to Step 1 | Doors not properly shut. | Shut the doors properly. |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the Examiner diagnostic equipment check, in Instrument Panel mode, that there are no errors and that the parameters are present. | Move on to Step 2 | 1. Impossible to connect to the Instrument Panel control unit.2. Presence of errors. | 1. Move on to Step 2.2. Continue by following the instructions on the diagnostic instrument. |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the Examiner check, in the Body Computer Node ambient, that there are no errors and that the door status parameters vary. | Move on to Step 4 | The parameter values do not change. | Move on to Step 3 |
| 3 | ELECTRICAL CONNECTION CHECK | All OK | Problems encountered | Operation |
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| - Check that the door switches in the geared motors are working properly;- Check the insulation to earth of the connection between the door switches and the Body Computer See E3040 CENTRAL LOCKING | Move on to Step 4 | 1. Switches defective2. Wiring with imperfect insulation to earth | 1. Replace the switches.2. Restore wiring insulation |
| 4 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation |
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| With the Examiner in the Instrument Panel Node ambient check that the doors open check warning light is correctly activated in Active Diagnosis | Move on to Step 5 | The doors open check warning light is not activated | Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
| 5 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present. | End of diagnosis. | The fault persists. | Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |
