Workshop Manuals Factory service & repair

Alfa Romeo 159 Factory Service Manual (2005-2011)17 · Electrical equipment

17 · Electrical

Speed signal check

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Exterior lighting › Speed signal check

‹ Prev Check the headlamp alignment motor supply wiring Next › Check the speed signal wiring continuity inside the master headlamp

Electrical equipmentSpeed signal check

SPEED SIGNAL CHECK

Check 5540BN

STEP	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
1	Turn 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 over	Move on to Step 2
2	Check 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
3	Check for wheel speed signal errors in the ABS control unit	Continue as instructed by the diagnostic equipment
4	Check for wiring continuity between the ABS control unit and the Body Computer See E7020 ABS	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R
5	Check that the fault is no longer present	Replace the Master headlamp Op. 5540B81 LEFT GAS DISCHARGE LIGHT CLUSTER - R.R.

VDC

STEP	CHECK TO BE PERFORMED	RESOLUTION IF THE CHECK IS NOT OK
1	Turn 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 over	Move on to Step 2
2	Check 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
3	Check for wheel speed signal errors in the ABS control unit	Continue as instructed by the diagnostic equipment
4	Check for wiring continuity between the ABS control unit and the Body Computer See E7022 VDC	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R
5	Check that the fault is no longer present	Replace the Master headlamp Op. 5540B81 LEFT GAS DISCHARGE LIGHT CLUSTER - R.R.

‹ Prev Check the headlamp alignment motor supply wiring Next › Check the speed signal wiring continuity inside the master headlamp

Parts & tools for this job For 2005 Alfa Romeo 159

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