Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
Electronic Brake Control Module: Testing and Inspection
Rough road signal from ABS/EDL control module, checking
NOTE:
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When the ABS/EDL control module senses wheel spin, it produces the rough road signal. When the ECM recognizes the rough road signal, the
misfire recognition is switched off
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Check the rough road signal only when the DTC 18014 (P1606) "Rough Road Spec Engine Torque ABS-ECU Electrical Malfunction" is stored.
The possible "Misfire" malfunction is in this case a subsequent malfunction that can be disregarded.
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The wiring and the rough road signal are monitored by the ECM.
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If an exhaust emissions test is performed on a front-wheel-drive vehicle with ABS/EDL where the front axle/wheels are moved while the rear
axle/wheels remain stationary can cause DTC 18014 (P1606) to be stored DTC memory.
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The fuse for the ABS/EDL control module must be removed when performing emissions tests on these vehicles. Check and erase DTC memory for
the ABS/EDL control module and the engine control module after an emissions test.
Special tools and equipment
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VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable
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VAG1598/22 test box
Checking conditions
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Control module coding OK.
Checking
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Connect VAG1598/22 test box to ECM harness connector.
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Check wiring for open circuit between ECM/test box (sockets 5 and 45) and ABS/EDL control module using appropriate wiring diagram.
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Specified value: max. 1.5 Ohms
If the wiring is OK:
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Replace ABS/EDL control module -J104-.
If the display does not change after replacing the ABS/EDL control module:
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Replace Motronic ECM -J220-.