diagnostic AUDI A4 1999 B5 / 1.G ATW Engine Motronic Fuel Injection Syst

24-26

Installing
Installation is reverse of removal, noting the
following:

Note:
Important note:
After installing new Engine Control Module
(ECM), the following work steps must be
performed:
- Check DTC memory and erase it if necessary
Page 01
-16
.
- Perform adaptation of the Throttle Valve Control
Module -J338- Page 24
-121
.
- Observe notes for coding new Engine Control
Module (ECM) Page 01
-62
.
- For vehicles with cruise control (discernable at
steering column), switch this free in ECM:

Repair Manual, Electrical Equipment On
Board Diagnostic (OBD), Repair Group 01; OBD for cruise control system

- For vehicles with automatic transmission, the
kick down function must be adapted Page 24
-
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- Adapt immobilizer to Engine Control Module
(ECM):

Repair Manual, Electrical Equipment On
Board Diagnostic (OBD), Repair Group 01; OBD of immobilizer
- variable code; adaptation after
replacing Engine Control Module (ECM)

- Generate readiness code Page 01
-73
.

Note:
During the first adaptation phase, it is possible
that idle will be rough and vehicle may shake
lightly in drive mode.
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Component location Overview of component
locations Page 24
-5 .
Voltage is supplied to the Fuel Pump (FP) and
several components of the injection system via
the Fuel Pump (FP) relay -J17-.
Engine must be turning for Fuel Pump (FP) relay
-J17- to close. This means that the relay does
not receive Ground (GND) (via ECM) until the
ECM recognizes RPM signals.

Test requirement:

Battery voltage at least 12.7 V

Function test of Fuel Pump (FP) relay

- Remove driver-side storage compartment.

Repair Manual, Body Interior, Repair Group
68


- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Ignition
must remain switched on.

-
Initiate output Diagnostic Test Mode (DTM)
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- Repair open circuit or short circuit if
necessary.
If no malfunctions are detected:

- Replace Fuel Pump (FP) relay -J17-.

- Re-connect Engine Control Module (ECM).

Check voltage supply for Fuel Pump (FP) and
components

- Remove fuses S228, S232, and S234 (positions 28, 32, and 34) from
fuse holder.
- Initiate output Diagnostic Test Mode (DTM) Page 01
-49
and activate
Evaporative Emission (EVAP) canister purge regulator valve -N80-.
- Connect multimeter for voltage measurement to Ground (GND) and to
one terminal of following fuses in fuse holder. Circlip
Specified value at one of the terminals
S228 approx. battery voltage
S232 approx. battery voltage
S234 approx. battery voltage
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pair&id=AUDI.B5.FU06.24.1