Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 1994 >> V8 Quattro V8-4.2L (ABH) >> Repair and Diagnosis >> Specifications >> Electrical Specifications >> Computers and Control Systems >> System Specifications
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

System Specifications

CRANKSHAFT POSITION SENSOR
Resistance between terminals 1 & 2 1k ohms

ENGINE COOLANT TEMPERATURE SENSOR
Resistance @ 68°F (20°C) Approx. 2.5K ohms
Resistance @ 176°F (80°C) Approx. 200 - 300 ohms

ENGINE SPEED SENSOR
Resistance between terminals 1 & 2 1k ohms

EVAPORATIVE EMISSION FREQUENCY VALVE
Resistance between terminals Approx. 30 - 60 ohms

EXHAUST GAS RECIRCULATION TEMPERATURE SENSOR
Voltage at harness connector, ignition ON 5 VDC
Resistance, sensor submerged in boiling water 80K to 160 ohms


EXHAUST GAS RECIRCULATION FREQUENCY VALVE
Duty cycle 32° ± 10% at 2000 RPM
Resistance between terminals 25 - 35 ohms

FUEL INJECTORS
Resistance between terminals 15 - 17 ohms

IDLE AIR CONTROL VALVE
Resistance between terminals 7.5 - 8.5 ohms

INTAKE AIR TEMPERATURE SENSOR
Resistance @ 68°F (20°C) approx. 450 - 525 ohms
Resistance @ 190°F (88°C) approx. 525 - 600 ohms

HEATED OXYGEN SENSOR
Voltage output @ operating temperature above 575°F (300°C)
Range 0.1 - 1.0 VDC
Nominal 0.3 - 0.6 VDC








pro multis · About Operation CHARM