ECO mode AUDI A4 1998 B5 / 1.G APB Engine Motronic Syst

01-7

Mode under Address word 33:
Mode 1: Transmit diagnostic data Switch ignition on or let engine run at idle
Mode 2: Transmit operating conditions Switch ignition on or let engine run at idle
Mode 3: Check DTC Memory Switch ignition on or let engine run at idle
Mode 4: Erase diagnostic data Switch ignition on or let engine run at idle
Mode 5: Output of oxygen sensor signals Switch ignition on or let engine run at idle
Mode 6: Transmit measured values Switch ignition on or let engine run at idle
Mode 7: Check DTC Memory Switch ignition on or let engine run at idle
Mode 8: Check tank leak test Switch ignition on or let engine run at idle
Mode 9: Read out vehicle information Let engine run at idle Mode 1 to 9 can be selected under address word 33.

Individual measured values can be read out under mode 1. Mode 1 is not recommended for authorized Audi service
centers, since the data can be obtained much more accurately under address word 01 function 04 or function 08.
Mode 2 displays operating conditions, for which malfunctions are recognized.
With mode 3 the DTC memory will be checked and with mode 4 the DTC memory will be erased.
Pa
ge 9 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
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01-30

DTC
Description of
malfunction
Corrective action
P0441 16825 EVAP Emission Contr.
Sys. Incorrect
Purge Flow
2) - Check EVAP canister purge regulator valve, perform output Diagnostic Test
Mode (DTM) Page 01
-75

P0442 16826 EVAP Emission Contr.
Sys. (Small Leak)
Leak Detected
2) - Check EVAP system and tank system for leaks
P0455 16839 EVAP Emission Contr.
Sys. (Gross Leak)
Leak Detected Repair Manual, Fuel Supply System, Repair Group 20, Components of EVAP
system servicing, carry out tank leak test

P0456 16840 Tank ventilation system
Pin-hole leak detected
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Repair Group 20;
Fuel supply, gas engine; EVAP canister system components, servicing; tank leak diagnostic, performing.
- Checking fuel supply and ventilation systems for leaks
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
Pa
ge 36 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
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01-68

DTC
Description of
malfunction
Corrective action
SAE
VAG


P1603 18011 Internal Control Module
Malfunction
2) - Replace Engine Control Module (ECM) Page 24
-24
.
P1604 18012 Internal Control Module
Malfunction
1)3)

P1606 18014 Rough Road Spec Engine
Torque ABS-ECU
Electrical Malfunction
Electrical Wiring Diagrams, Troubleshooting & Component Locations - Check wire connection between ECM and ABS control module Page 24
-
198

P1609 18017 Crash shut-down
activated Accident with airbag triggered or a output Test Diagnostic Mode (TDM) has
been carried out, therefore erase DTC Memory in ECM; Notes crash signal
Page 24
-196

P1612 18020 Electronic Control Module
2)
Incorrect Coding - Check or code Engine Control Module (ECM) Page 01
-93
1) With this malfunction the EPC (Electronic Power Control) Malfunction Indicator Light (MIL) in the instrument cluster is
switched on by the ECM. Significance of EPC malfunction indicator light Page 24
-142
.
2) With this malfunction the exhaust Malfunction Indicator Light (MIL) is only switched on by the ECM, if the malfunction is
recognized after the engine has been restarted. Significance of MIL Page 01
-3 .
3) With this malfunction the exhaust Malfunction Indicator Light (MIL) is switched on by the ECM, immediately after the
malfunction has been recognized. Significance of MIL Page 01
-3 .
Pa
ge 82 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
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pair&id=AUDI.B5.FU04.01.1

01-79

Actuating Secondary Air Injection (AIR)
Solenoid Valve -N112

Note:
Only vehicles with automatic transmission are
equipped with a secondary air injection system.
Vehicles with manual transmission do not have a
secondary air injection system. For this reason
are on vehicles with manual transmission the
following components Secondary Air Injection
(AIR) Solenoid Valve -N112 and Secondary Air
Injection (AIR) Pump Relay -J299 not displayed.

-
Press button.Output Diagnostic Test Mode Secondar
y Air
(AIR
) Injection valve -N112

Indicated on display
This solenoid valve will continue to be actuated (i.e. will click) until the
button is pressed to advance the program to the next control element.
If the secondary air injection valve does not click:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 26, Checking secondary air injection valve

- Check Secondary Air Injection (AIR) Solenoid Valve -N112
Pa
ge 97 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
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01-80

Actuating Secondary Air Injection (AIR) Pump
Relay -J299

Note:
Only vehicles with automatic transmission are
equipped with a secondary air injection system.
Vehicles with manual transmission do not have a
secondary air injection system. For this reason is
on vehicles with manual transmission the
following component Secondary Air Injection
(AIR) Pump Relay -J299 not displayed.

-
Press button.Output Diagnostic Test Mode Secondar
y air pump rela
y -J299

Indicated on display
If the Secondary Air Injection (AIR) Pump Motor -V101- does not run at
intervals:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 26, Checking Secondary Air Injection (AIR) Pump Relay
-J299
The Secondary Air Injection (AIR) Pump Relay -J299- activates the
Secondary Air Injection (AIR) Pump Motor -V101-, which runs for
approx: 1 minute at intervals.
- Check Secondary Air Injection (AIR) Pump Relay -J299.
Pa
ge 98 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1