ABS AUDI A4 1999 B5 / 1.G ATQ Engine Additional Signals Testing Workshop Manual

24-190

Rough terrain signal from ABS/EDL
control module, checking


Notes:

When the ABS/EDL control module recognizes
that a wheel is spinning, the ABS/EDL control
module generates the rough terrain signal.
When the Engine Control Module (ECM)
recognizes the rough terrain signal, combustion
misfire recognition is switched off in the Engine
Control Module (ECM).
Only check the rough terrain signal if the
malfunction "18014 (P1606) rough terrain
info/engine torque from ABS cont. mod.
Electrical malfunction in circuit" is stored DTC
memory.It is possible that the malfunction
"Combustion misfire" is also stored in DTC
memory as a side effect and it can be
disregarded.
The wire connection and rough terrain signal
are monitored by the Engine Control Module
(ECM).
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24-191

Test requirement:

Control module coding OK Page 01
-71
.

Test sequence

- Switch ignition off.

- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.

- Check the following wire connection for open
circuit and short circuit to Ground (GND) and B+:

Test box
VAG1598/31
Socket
ABS control module (w/EDL)
-J104-
Terminal
74 Electrical Wiring Diagrams,
Troubleshooting & Component
Locations binder
If no malfunctions are found in wire:

- Replace ABS control module.
If the malfunction is indicated again after
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replacing the ABS control module:

- Replace Engine Control Module (ECM) Page
24
-21
.
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e=re
pair&id=AUDI.B5.FU05.24.6