engine AUDI A4 1996 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

01-143

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

Malfunction repair
P1612 / 18020
ECM Incorrectly
Coded Malfunction P1606 / 18014 "Rough
Road Spec Engine Torque ABS-SG
Electrical Malfunction" also stored in DTC
memory
No
Yes

- Engine control module incorrectly coded

Cause: The vehicle is equipped with traction
control, but coding was done for vehicle
without traction control.
Remedy: code vehicle correctly according to
coding table.

Malfunction cause found: Yes
No

- Erase DTC memory, take test drive, after test
drive check DTC memory again
MIL Status:
Malfunction not
displayed by MIL Engine control module incorrectly coded


Cause: Vehicle is equipped with automatic
transmission, but was coded for manual
transmission or otherwise incorrectly coded
Remedy: code vehicle correctly according to
coding table.

Malfunction cause found: Yes


- Erase DTC memory, test drive, after test drive
check DTC memory again
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01-144

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

Malfunction repair
P1613 / 18021
MIL Call-up Circ.Open
Short to B+ 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 ABS control module -J104-

Malfunction cause found: Yes
No

- Erase DTC memory, take 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:

This malfunction can only occur in connection with an automatic transmission.
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01-145

Output Diagnostic Test Mode (scan tool
function 03)


Test requirements:

Fuses for engine electronics OK
Fuel Pump (FP) Relay OK
Ground connections OK page 01
-5

Triggering sequence:

Fuel Pump (FP) relay -J17-
Idle Air Control (IAC) valve -N71-
Intake manifold change-over valve -N156-
EVAP canister purge regulator valve -N80-
EGR vacuum regulator solenoid valve -N18-
Secondary Air Injection (AIR) solenoid valve -
N112- (only on vehicles with secondary air
system)
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01-146

Notes:

The output diagnostic test mode can only be
carried out with the ignition switched on and the
engine NOT running.
The output diagnostic test mode is interrupted if
the engine is started or a rotary pulse is
recognized.
During the output diagnostic test mode, the
individual outputs are triggered until the
program is continued by pressing the button.

The outputs are checked by listening for the
sound of the component being actuated, of by
feeling for mechanical evidence of actuation
(clicking, vibration, etc.).
Without letting the engine run briefly, switch the
ignition off for approx. 20 sec before repeating
the output diagnostic test mode.

- Connect VAG 1551 scan tool and initiate until
"Select function" is indicated on the display
page 01
-7 .
Rapid data transfer
HELP
Select function XX

Indicated on display
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01-149

Only on vehicles with secondary air injection
(AIR) system Output diagnostic test mode Secondar
y Air In
jection
(AIR
) solenoid valve -N112

Indicated on display
This valve is triggered (clicks) until you move on to the next output by
pressing the button. - If the valve is not triggered (does not click), check -N112-.
Output diagnostic test mode Secondar
y Air In
jection
(AIR
) pump rela
y -J299

Indicated on display
The secondary air injection pump relay -J299- triggers the secondary air
pump motor and it runs until the output DTM is ended by pushing the
button (maximum 10 sec.). - If secondary air injection pump motor does not run, check engine and -
J299-.
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
Before selecting "Output Diagnostic Test Mode" function 03 again, switch
ignition off for approx. 20 sec.
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01-150

Basic Setting (scan tool function 04)


Notes:

Basic setting is carried out with engine
running.
The OBD II engine control module shows the
"Readiness Code" in display group 29. The
readiness code is reset when the engine control
module power is off and each time the DTC
memory is erased. In order to regenerate the
readiness code it is necessary to take a trip in
"mixed city and highway" driving-approx. 1-1/2
to 5 minute drive at 80-100 km/h (50-63 mph)
with manual transmission in 4th or 5th gear,
preferably 4th gear, or automatic transmission
selector lever in "D" position.
When the "Basic Setting" function 04 is initiated
with the VAG 1551 scan tool, the learning
values are relearned in systems capable of
learning. Learning is prohibited, as soon as a
malfunction is stored in the DTC memory that
relates to a system capable of learning (not with
sporadic malfunctions).
All learning values are erased by disconnecting
the connector from the Engine Control Module
(ECM). After that, uneven idle can occur briefly.
In this case, let engine run in idle for a few
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01-151

Note:
After function 04 is called up, the Engine Control
Module (ECM) carries out the following
operations:

Constant ignition timing point of 12 BTDC is
output in idle.

Digital idle speed control is blocked.
Evaporative emissions canister purge regulator
valve is closed.
A/C compressor is switched off.
EGR vacuum regulator solenoid valve is
closed
No coolant temperature correction-fixed value
of 80 C (176 F)

Learning values are relearned (idle and CO
content are adjusted automatically)
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01-152

Requirements:

Engine temperature at least 85 C (185 F)

Do not operate accelerator pedal
All electrical consumers switched off
A/C system switched off. Push minus (-)
button for A/C fresh air fan repeatedly until
all the displays are cleared
Move selector lever to P or N
No malfunctions in Diagnostic Trouble Code
(DTC) memory
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01-153

- Check and erase DTC memory page 01
-
13
.

There must be no malfunctions stored (if
necessary repair malfunction, erase DTC
memory and test drive, switch engine off and
start again, test drive and, as a check, check
DTC memory again).

Note:
The readiness code is erased each time the DTC
memory is erased (either with function 05 or with
Mode 4).

- After checking and erasing DTC memory, let
engine continue to run at idle.
Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
When the HELP button is pressed, an overview of possible functions is
printed out.
- Press buttons -0- and -4- to select "Basic Setting" function 04.
Rapid data transfer
Q
04 - Basic Setting

Indicated on display
- Press Q-button to confirm input.
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01-156
Display group overview with test table

Note:
Display groups 000 to 010 are used for general troubleshooting.
Display group
Display shows
Designation
000 Basic setting 0
1 2 3 4 5 6 7 8 9 10 Key to displays page 01
-163

001 Basic setting 1
1 2 3 4 1 = Engine coolant temperature
2 = Mass Air Flow (MAF) sensor output voltage
3 = Altitude display (only on vehicles with secondary air system )
4 = Engine Control Module (ECM) voltage supply
002 Basic setting 2
1 2 3 4 1 = Throttle Position (TP) sensor voltage (coarse)
2 = Throttle Position (TP) sensor voltage (fine)
3 = Throttle Position (TP) sensor learning value
4 = Closed Throttle Position (CTP) switch
003 Basic setting 3
1 2 3 4 1 = Engine speed (RPM)
2 = Engine load
3 = Throttle angle
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