torque AUDI A6 1999 C5 / 2.G ATW Engine Ignition System Workshop Manual

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Technical data

Engine identification
ATW (1.8 L / 5V/ 110 kW engine)
Idle speed
Engine speed cannot be adjusted, it is
regulated by idle stabilization Front Wheel Drive (FWD): 740 to 860 RPM
All-Wheel Drive Vehicles: 800 to 920 RPM
Engine speed (RPM) limitation
Via fuel injector shut-off
about 6800 RPM
Ignition timing is determined in the control
module
It is not possible to adjust the ignition
timing
Ignition system Single coil ignition system with 4 ignition coils (power output stages integrated)
that are connected directly to spark plugs via the ignition cables.
Spark plugs Tightening torque 30 Nm.
Firing sequence 1-3-4-2
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Knock recognition control stop,
checking

If a DTC is stored regarding "Knock control
regulation limit reached":

- Perform following tests:

Possible cause
Corrective action
DTC for all cylinders

Poor fuel quality
Operating instructions - Change fuel quality
or
Cylinder 1/2 or 3/4
Knock sensor tightened to incorrect torque- Loosen knock sensors and tighten to 20 Nm

Knock sensor faulty- Check knock sensor Page 28
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Corrosion at harness connector- Check harness connector

Engine accessories loose- Secure engine accessories
DTC for one Cylinder
Engine damage- Check compression pressure

Engine accessories loose- Secure engine accessories
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Component location Overview of component
locations Page 24
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Note:

Knock Sensor (KS) 1 -G61- and Knock Sensor
(KS) 2 -G66- themselves cannot be electrically
tested.
Use only gold-plated terminals when servicing
harness connector for knock sensors.
For the knock sensors to function properly, it is
important that tightening torque be exactly 20
Nm.
Check harness connector from knock sensor to
wiring harness for corrosion.

Checking knock sensor wiring

- Disconnect harness connector for Knock Sensor (KS) 1 -G61- (item no.
5) or Knock Sensor (KS) 2 -G66- (item no. 4) in engine compartment.
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