wiring diagram AUDI A8 1999 D2 / 1.G ATQ Engine Check DTC Memory And Erase DTC Memory Workshop Manual

01-18
Diagnostic Trouble Code (DTC) table

Notes:

When malfunctions occur in monitored sensors or components, Diagnostic Trouble Codes (DTCs) are stored in DTC
memory with a description of the malfunction type.
"E-Gas"-relevant malfunctions are also indicated in the instrument cluster by the warning lamp for Electronic Power
Control ("EPC warning lamp"); Notes for E-gas system Page 24
-134
.
Malfunctions that worsen emissions are also indicated by an exhaust warning lamp (MIL for output DTM) that is also
located in the instrument cluster. There are malfunctions that cause the exhaust warning lamp to light up immediately after
recognition. Malfunctions can also occur that do not cause the exhaust MIL to light up immediately, but only if malfunction
is recognized again after repeated engine starts.
The DTC table is organized by the 5 digit code at left.
If a stored DTC does not recur within the next 40 warm-up cycles, the DTC will be erased automatically.
Malfunctions that occur only sporadically (temporary malfunctions) are are identified by the letters "SP" (sporadic
malfunction) on the VAG1551 scan tool display. The word sporadic means "appearing or occurring at irregular intervals,
occasional".
Do not immediately replace components that the VAG1551/VAS5051 suggests are faulty, instead: Check wire
connections and harness connectors to these components according to wiring diagram. Also check Ground (GND)
connections according to wiring diagram. This is particularly valid when malfunctions are displayed as "sporadically
occurring" (SP).
Pa
ge 6 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
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01-40

DTC
DTC text
Corrective action
SAE
VAG


P1250 17658
Fuel level too low
4)
Repair Manual, Electrical Equipment, Repair Group 01, On Board Diagnostic
(OBD) of instrument cluster; Read Measuring Value Block
- Fill fuel tank with fuel
- Check wire connection between Engine Control Module (ECM) and instrument
cluster according to wiring diagram
- Check signal from sender for fuel gauge and fuel gauge
P1296 17704 Malfunction in cooling
system
1)
Repair Manual, Engine Mechanical, Repair Group 19; Cooling system
components, removing and installing - Check coolant temperature sensor Page 28
-23
- Check coolant regulator
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
4) The DTC "Fuel Level Too Low" is stored when there is/was too little fuel in fuel tank. The DTC is stored as a static
malfunction and is not switched to sporadic even if fuel tank has been filled with fuel (e.g. by the customer) in the meantime.
In this way, it can be determined that subsequent malfunctions were caused by lack of fuel, e.g. combustion misfires or
oxygen control related malfunctions.
Pa
ge 31 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-47

DTC
DTC text
Corrective action
SAE
VAG


P1471 17879 Leak Detection Pump (LDP)
tank ventilation system
Short circuit to B+
1) - Leak Detection Pump (LDP) Checking
P1472 17880 Leak Detection Pump (LDP)
tank ventilation system
Short circuit to Ground (GND)
1) Repair Manual, Engine Mechanical, Repair Group 20; EVAP canister
system components, servicing; Leak Detection Pump (LDP) -V144-,
checking.
P1473 17881 Leak Detection Pump (LDP)
tank ventilation system
Open circuit
1)
P1475 17883 Leak Detection Pump (LDP)
tank ventilation system
Malfunction / no signal
1)
Repair Manual, Engine Mechanical, Repair Group 20; EVAP canister
system components, servicing; wiring diagram, EVAP canister system. - Check pressurized/vacuum lines to Leak Detection Pump (LDP)
P1476 17884 Leak Detection Pump (LDP)
tank ventilation system
Malfunction/vacuum pressure
too low
1) - Check electrical wire connections to Leak Detection Pump according
to wiring diagram
1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
Pa
ge 41 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2

01-52

DTC
DTC text
Corrective action
SAE
VAG


P1603 18011
Control module faulty
1)
- Replace Engine Control Module (ECM) Page 24
-21
P1604 18012
Control module faulty
2) 3)


P1606 18014 Rough terrain info/engine torque
from ABS control module
Electrical malfunction in circuit
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder - Check wire connection between Engine Control Module (ECM) and
ABS control module (powertrain databus) Page 24
-192

P1609 18017 Crash shut-off was triggered
(Crash triggered)
5) Repair Manual, Body
-On Board Diagnostic (OBD), Repair Group 01;
On Board Diagnostic (OBD) of airbag system

- Erase DTC memory of the Engine Control Module (ECM) after output
Diagnostic Test Mode (DTM) of the airbag system Page 01
-15

1) For these malfunctions, ECM does not switch on the Malfunction Indicator Lamp (MIL) unless malfunction is recognized
again after another engine start. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
2) For these malfunctions, ECM switches on the EPC warning lamp in instrument cluster. Significance of EPC warning lamp
Page 24
-136
.
3) For these malfunctions, the Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) in the
instrument cluster immediately after recognizing the malfunction. Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 .
5) DTC is stored upon appropriate signal from airbag control module, also during output Diagnostic Test Mode (DTM) of the
airbag system.
Pa
ge 48 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.2