939005435 - 5540BN SPEED SIGNAL CHECK

STEPCHECK TO BE PERFORMEDRESOLUTION IF THE CHECK IS NOT OK
1Turn on the diagnostic tester and go to Instruments.In Voltmeter mode, select a full scale deflection value 20 V and a time base of 2 s.Connect the voltmeter red probe to Pin 10 of the master headlamp 14-way connector    See F010 LEFT HEADLAMP and the black probe to Earth.Turn one wheel by hand and when the speed is 4-6 km/h press the START button.Check that the signal acquired looks the attached graph without any dips.The test can be considered overMove on to Step 2
2Check for wiring continuity between Pin 28 of Body Computer connector B    See M001 BODY COMPUTER , and Pin 10 of the Master headlamp 14-way connector    See F010 LEFT HEADLAMP The test can be considered over
3Check for wheel speed signal errors in the ABS control unitContinue as instructed by the diagnostic equipment
4Check for wiring continuity between the ABS control unit and the Body Computer    See E7020 ABS Replace Body Computer    Op. 5505A32 BODY COMPUTER - R.R
5Check that the fault is no longer presentReplace the Master headlamp    Op. 5540B81 LEFT GAS DISCHARGE LIGHT CLUSTER - R.R.