diagnostic AUDI A4 1995 B5 / 1.G ATQ Engine Check DTC Memory And Erase DTC Memory Workshop Manual

01-17

Rapid data transfer DTC Memor
y is erased

When indicated on display:
Note:
This causes DTCs to be erased that were stored during repair of
malfunction, e.g. because harness connectors were disconnected.
End Output -
Press button.- Check DTC memory again after repair work and erase it if necessary.
- If DTC memory was erased, readiness code must be re-generated
Page 01
-82
.
Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -6- to select "End output" and press -Q- button to
confirm input.
Rapid data transfer
HELP
Insert address word XX

When indicated on display:
- Switch off ignition and disconnect diagnostic cable.
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y (function 02
) and Erase DTC Memor
y (function 05
)
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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
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y (function 02
) and Erase DTC Memor
y (function 05
)
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01-28

DTC
DTC text
Corrective action
SAE
VAG


P0441 16825 Tank ventilation
system
Throughput faulty
1) - Check Evaporative Emission (EVAP) Canister Purge Regulator Valve, perform
output Diagnostic Test Mode (DTM) Page 01
-56

P0442 16826 Tank ventilation
system
Small leak
detected
1) - Checking fuel supply and ventilation systems for leaks
P0455 16839 Tank ventilation
system
Large leak
detected 1) Repair Manual, Engine Mechanical, Repair Group 20; Evaporative Emissions
(EVAP) System Diagnosis using KLI9210 EVAP Tester, test EVAP system.
P0456 16840 Tank ventilation
system
Pinhole leak
detected
1) Repair Manual, Engine Mechanical, Repair Group 20; EVAP canister system
components, servicing; tank leak diagnostic, performing.
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 17 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
11/23/2002 htt
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yp
e=re
pair&id=AUDI.B5.FU05.01.2

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
)
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01-48

DTC
DTC text
Corrective action
SAE
VAG


P1501 17909 Fuel Pump (FP) relay -J17-
Short circuit to Ground
(GND)
1) - Check Fuel Pump (FP) relay Page 24
-49
P1502 17910 Fuel Pump (FP) relay -J17-
Short circuit to B+
1)
P1512 17920 Intake manifold change-over
valve -N156-
Short circuit to B+1) - Check intake manifold change-over
Page 24
-71

P1515 17923 Intake manifold change-over
valve -N156-
Short circuit to Ground
(GND)
1)
P1516 17924 Intake manifold change-over
valve -N156-
Open circuit
1)
P1519 17927 Bank 1, camshaft
adjustment
Malfunction
1) Repair Manual, Engine Mechanical, Repair Group 15; Camshaft
adjustment, checking; Function of camshaft adjustment, checking
P1522 17930 Bank 2, camshaft
adjustment
Malfunction
1)
P1523 17931 Crash signal from airbag
control module Repair Manual, Body
-On Board Diagnostic (OBD), Repair Group 01; On
Board Diagnostic (OBD) of airbag system

Pa
ge 42 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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01-51

DTC
DTC text
Corrective action
SAE
VAG


P1569 17977 Cruise control switch -E45-

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

P1570 17978 Engine Control Module
(ECM)
locked
Repair Manual, Electrical Equipment, Repair Group 01, On Board
Diagnostic (OBD) for immobilizer
- Adapt electronic immobilizer to Engine Control Module (ECM)
P1579 17987 Throttle valve control
module -J338-
Adaptation not started - Perform adaptation of throttle valve control module while maintaining test
requirements Page 24
-142

P1602 18010 Voltage supply, terminal 30

Voltage too low - Check voltage supply for control module Page 28
-30
Pa
ge 47 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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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
)
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01-53

DTC
DTC text
Corrective action
SAE
VAG


P1386 17794 Control module faulty
- Replace Engine Control Module (ECM) Page 24
-21
P1612 18020 Engine Control Module (ECM)
incorrectly coded
1) - Code Engine Control Module (ECM) Page 01
-71
P1624 18032 Request for warning lamp on active
7)
Repair Manual, Automatic Transmission On Board Diagnostic
(OBD), Repair Group 01; On Board Diagnostic (OBD) - Exhaust related malfunction of Transmission Control Module
(TCM)
- Check DTC memory of Transmission Control Module (TCM)
P1626 18034 Powertrain databus
Missing message from Transmission
Control Module (TCM)
1) - Check data transfer of Engine Control Module (ECM) and other
CAN capable control modules Page 24
-192

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 .
7) The Transmission Control Module (TCM) recognized a malfunction that worsens engine emissions. The Transmission
Control Module (TCM) sends the DTC to the Engine Control Module (ECM), which then switches on the Malfunction Indicator
Lamp (MIL). Meaning of Malfunction Indicator Lamp (MIL) Page 01
-3 . The message P1624 is simultaneously stored in the
Engine Control Module (ECM) as evidence that the Malfunction Indicator Lamp (MIL) was not switched on due to an engine
problem but rather a transmission problem.
Pa
ge 49 of 52 Check DTC Memor
y (function 02
) and Erase DTC Memor
y (function 05
)
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p://127.0.0.1:8080/audi/servlet/Dis
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yp
e=re
pair&id=AUDI.B5.FU05.01.2