transmission AUDI A4 2000 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-1
On Board Diagnostic (OBD) - Multiport Fuel Injection (MFI) Engine Control Module (ECM) versions - overview

Engine control modules: 4A0 906 266 A
4A0 906 266 AA
4A0 906 266 AB
These are the introductory version and successor versions for the USA Audi 100 with On Board Diagnostic (OBD I). The
engine control modules are downwardly compatible. The function and structure of the system are described in Self-study
Program No. 130.
Engine control module: 8A0 906 266 B
With this version, the MFI ECM was completely modified. Important new features are:
- Oxygen sensor control with learning function; CO adjustment on Mass Air Flow (MAF) sensor eliminated.
- Coding of MFI ECM using VAG 1551 scan tool and "Code Control Module" function 07.
Engine control modules: 8A0 906 266 E
8A0 906 266 H
8A0 906 266 J
These are the successor versions of the 8A0 906 266 B control module.
Engine control module: 8A0 906 266 D
With this version, the On Board Diagnostic II (OBD II) was used in the Audi A6 with 2.8 liter V6, manual transmission and
front wheel drive. Important new features on vehicles with OBD II are:
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01-4

Malfunction Indicator Lamp (MIL),
functions


Functional testing:
The Malfunction Indicator Lamp (MIL) must light up every time the
ignition is switched on and go out after the engine starts. If a
malfunction is recognized by the engine control module or the
transmission control module, this is indicated by the MIL lighting up. If the MIL lights up continuously, there is a malfunction present that
makes the exhaust gas worse. In this case, the DTC memory for the
engine control module and/or the transmission control module should
be checked. If the MIL starts to blink, there is a malfunction that can lead to
damage of the three way catalytic converter (e.g. combustion misfiring
with high misfiring rate). In this case, driving should only continue with
reduced power (until the MIL goes off or lights up continuously) and
the malfunction should be eliminated as quickly as possible.
- Switch ignition on: the MIL must light up. If the MIL does not light up,
check wiring according to wiring diagram and/or replace lamp.
- Start engine and let idle: MIL must go out after a couple seconds. If the
MIL does not go out after the engine starts, check DTC memory for the
engine and/or transmission control modules (malfunctions in DTC
memory).
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01-12

Engine control module hardware and software
version: D_ _ Control module program status
Engine control module coding: 01051
Diagnostic Trouble Code (DTC) table, page 01
-247
.

VAG plant number: WSC 06388 (where the
VAG 1551 scan tool was used for the last
coding and/or adaptation)

Notes:
If the engine control module version that
corresponds to the vehicle is not displayed,
replace engine control module page 01
-265
.
Incorrect engine control module coding leads to:

Driving performance problems (jerky shifting,
abrupt load change, etc.)
Increased fuel consumption
Elevated exhaust gas values
Reduction in transmission service life

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01-20

Diagnostic Trouble Code
(DTC) Malfunction text
MIL switching
condition
SAE
VAG
P0605 65535 Internal Control Module Read Only Memory (ROM) Error (Module
Identification Defined by SAE J1979)
P0605 16989 Internal Control Module Read Only Memory (ROM) Error (Module
Identification Defined by SAE J1979) immediately
P0702 00545 Transmission Control System Electrical
P0706 17090 Transmission Range Sensor Circuit Range/Performance off
P0707 17091 Transmission Range Sensor Circuit Low Input off
P0717 17101 Input/Turbine Speed Sensor Circuit No Signal
P0722 00297 Output Speed Sensor Circuit No Signal
P0726 00543 Engine Speed Input Circuit Range/Performance
P0732 00652 Gear 2 Incorrect Ratio
P0733 00652 Gear 3 Incorrect Ratio
P0734 00652 Gear 4 Incorrect Ratio
P0735 00652 Gear 5 Incorrect Ratio
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01-25

Diagnostic Trouble Code
(DTC) Malfunction text
MIL switching
condition
SAE
VAG
P1600 18008 Power Supply (B+) Terminal 15 Low Voltage off
P1602 18010 Power Supply (B+) Terminal 30 Low Voltage immediately
P1606 18014 Rough Road Spec Engine Torque ABS-SG Electrical
Malfunction off
P1611 18019 MIL Call-up Circ./Transm. Control Module Short to Ground immediately
P1612 18020 ECM Incorrectly Coded immediately
P1613 18021 MIL Call-up Circ.Open Short to B+ immediately
P1746 00532 Repair Manual, 5 Spd. Automatic Transmission 01V

P1748 65535 Repair Manual, 5 Spd. Automatic Transmission 01V
P1813 00264 Repair Manual, 5 Spd. Automatic Transmission 01V
P1818 00266 Repair Manual, 5 Spd. Automatic Transmission 01V
P1823 00268 Repair Manual, 5 Spd. Automatic Transmission 01V
P1828 00270 Repair Manual, 5 Spd. Automatic Transmission 01V Pa
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01-26
Diagnostic Trouble Code (DTC) table


Following are all the possible malfunctions that can be recognized by the Engine Control Module (ECM) -J192- and
printed on the VAG 1551 scan tool printer, listed according to code identifier ( SAE and VAG codes).
Malfunctions that switch the MIL on never or immediately are set as "sporadic" each time the engine is started. If the
malfunction occurs again, the "sporadic" status is set again. For malfunctions that only switch the MIL on after two trips
with malfunction, the "sporadic" status is only erased after an OK diagnosis.
If the MIL lights up with engine running, there is a malfunction that makes the exhaust gas worse. If the MIL lights up and
the engine is running, there must in any case be a malfunction stored in the DTC memory of the engine control module
and/or of the transmission control module. In this case, the DTC memory of the engine control module and/or the
transmission control module must be checked.
If the MIL starts to blink, there is a malfunction present that can lead to three way catalytic converter damage (e.g.
combustion misfiring with high misfiring rate). In this case, the trip should be continued with reduced power (until the MIL
goes out or lights up continuously) and the malfunction should be eliminated as quickly as possible.
The malfunction is not stored in the DTC memory immediately and the MIL is not switched on immediately with some
malfunction types, but only after two successive trips with or without preceding cold start (-10 to 30 C (14 to 86 F)
and malfunction occurring (malfunction recognition twice). The MIL switching condition is always specified in the Diagnostic Trouble Code (DTC) table.
Combustion misfiring with high misfiring rate is displayed immediately with the MIL blinking, since the three way catalytic
converters can be damaged. In this case, driving should continue only with reduced power and the malfunction should be
eliminated as soon as possible.
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01-88

Output on GST and/or on
VAG 1551 scan tool Possible malfunction cause

Malfunction repair
P0706 / 17090
Transmission Range Sensor
Circuit Range/Performance Engine control module incorrectly coded

- Cause: the vehicle is equipped with
manual transmission, but was coded
for vehicle with automatic
transmission.
- Remedy: code vehicle correctly
according to Coding Table

Malfunction cause found: Yes
No

- Erase DTC memory, test drive and
after test drive, check DTC memory
again
MIL Status:
Malfunction not displayed by
MIL Automatic transmission: faulty wiring
connection between Engine Control Module
(ECM) -J192- and multi-function Transmission
Range (TR) switch -F125-

- Check gear recognition signal
page 24
-99

For troubleshooting
Display group 004
Malfunction cause found: Yes
No

- Erase DTC memory, test drive and
after test drive, check DTC memory
again

Automatic transmission: malfunction of
multi-function Transmission Range (TR) switch
-F125-

Repair Manual, 5 Spd. Automatic
Transmission 01V On Board Diagnostic (OBD), Repair Group 01
- Check multi-function Transmission
Range (TR) switch -F125-

Malfunction cause found: Yes

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01-89

Output on GST and/or
on VAG 1551 scan
tool Possible malfunction cause

Malfunction repair
P0707 / 17091
Transmission Range
Sensor Circuit Low
Input Wiring connection between Engine Control
Module (ECM) -J192- and multi-function
Transmission Range (TR) switch -F125- on
automatic transmission faulty

- Check gear recognition signal page 24
-99


Malfunction cause found: Yes
No

- Erase DTC memory, test drive and
after test drive, check DTC memory
again
MIL Status:
Malfunction not
displayed by MIL Malfunction on multi-function Transmission
Range (TR) switch -F125- of automatic
transmission

Repair Manual, 5 Spd. Automatic
Transmission 01V On Board Diagnostic (OBD), Repair Group 01, Electrical testing

- Check multi-function Transmission
Range (TR) switch -F125-
For troubleshooting
Display group 004
Malfunction cause found: Yes


- Erase DTC memory, test drive and
after test drive, check DTC memory
again
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01-142

Output on GST and/or
on VAG 1551 scan tool
Possible malfunction cause

Malfunction repair
P1611 / 18019
MIL Call-up Circ./
Transm.Control Module
Short to Ground Wiring connection between Engine
Control Module (ECM) -J192- and
Transmission Control Module (TCM) -J217-
faulty

- Check MIL wiring from Transmission
Control Module (TCM) -J217- page 24
-
105


Malfunction cause found: Yes
No

- Erase DTC memory, test drive, after test
drive check DTC memory again
MIL Status:
MIL lights up
immediately Transmission Control Module (TCM) -
J217- faulty

Repair Manual, 5 Spd. Automatic
Transmission 01V On Board Diagnostic (OBD), Repair Group 01
- Replace Transmission Control Module
(TCM) -J217-

Malfunction cause found: Yes
No

- Erase DTC memory, test drive, after test
drive check DTC memory again
For troubleshooting
Display group 027
Engine Control Module (ECM) -J192-
faulty

- Replace and code ECM -J192- page 01
-265
erase DTC memory and take
test drive check DTC memory
Notes:
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This malfunction can only occur in connection with an automatic transmission.
If there are malfunctions recognized that are related to the exhaust system, the automatic transmission switches the MIL
on via the request wire.
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