S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
Rough Road Sensor: Testing and Inspection
Signal For Rough Road Recognition From ABS/EDL Control Module, Checking
NOTE:
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The ABS/EDL control module generates the rough road signal if it recognizes wheel spin on a wheel. The Engine Control Module (ECM)
switches off the misfire recognition once the rough road signal is recognized by the ECM.
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The rough road signal should only be checked if the malfunction (P1606) 18014 "Rough Road Spec Engine Torque ABS ECU/Electrical
Malfunction" is stored in the DTC memory. It is possible that the malfunction "Misfiring" is also stored in DTC memory, however this is then a
sequence error and should be ignored.
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The wiring and the rough road signal is monitored by the ECM.
Test conditions
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Control module coding OK. Refer to "Programming Control Module (ECM) (Function 07)" See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
Test sequence
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Wiring And Component Check With VAG1598/31 Test Box", See: Powertrain Management/Computers and Control
Systems/Testing and Inspection
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Check wire from test box socket 74 to ABS Control Module according to wiring diagram for short circuit or open circuit.
If no malfunction is detected:
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Replace ABS control module.
If, after the ABS control module has been replaced the malfunction appears again:
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Replace Engine Control Module (ECM).