Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI199590 QUATTRO SPORT V6-2.8L (AAH)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDESCRIPTION AND OPERATIONSYSTEM LAYOUT
1995 Audi 90 Quattro Sport V6-2.8L (AAH)
System Layout
1995 Audi 90 Quattro Sport V6-2.8L (AAH)SECTION System Layout
Ignition system
1 - Engine Control Module (ECM) -J192-
2 - Signal wires from ECM
^ 4-pin, light brown
3 - Power output stage -N122-
^ For ignition coils
4 - Harness connector for ignition coil primary circuit
^ 3-pin, dark brown
5 - Harness connector for Knock Sensor (KS) 2 -G66-
^ 3-pin, blue
6 - Camshaft Position (CMP) sensor -G40-
7 - Crankshaft Position (CKP) sensor -G4-
8 - Knock Sensor (KS) 2 -G66-
9 - Ignition coils -N-, -Ni 28-, -Ni 58-
10 - Knock Sensor (KS) 1 -G61-
11 - Spark plug connector with spark plug
12 - Harness connector for Crankshaft Position (CKP) sensor
13 - Harness connector for Knock Sensor (KS) 1 -G61-
14 - Harness connector for ignition coils
15 - To circuit breaker -S64-
^ in electronics box, passenger side footwell, yellow holder
16 - ECM connector C
^ 16-pin, brown
17 - ECM connector B
^ 20-pin, red
18 - ECM connector A
^ 12-pin, black
19 - ECM connector D
^ 16-pin, black
Ignition System Layout:
1 - Engine Control Module (ECM) -J192-
2 - Signal wires from ECM
^ 4-pin, light brown
3 - Power output stage -N122-
^ For ignition coils
4 - Harness connector for ignition coil primary circuit
^ 3-pin, dark brown
5 - Harness connector for Knock Sensor (KS) 2 -G66-
^ 3-pin, blue
6 - Camshaft Position (CMP) sensor -G40-
7 - Crankshaft Position (CKP) sensor -G4-
8 - Knock Sensor (KS) 2 -G66-
9 - Ignition coils -N-, -Ni 28-, -Ni 58-
10 - Knock Sensor (KS) 1 -G61-
11 - Spark plug connector with spark plug
12 - Harness connector for Crankshaft Position (CKP) sensor
13 - Harness connector for Knock Sensor (KS) 1 -G61-
14 - Harness connector for ignition coils
15 - To circuit breaker -S64-
^ in electronics box, passenger side footwell, yellow holder
16 - ECM connector C
^ 16-pin, brown
17 - ECM connector B
^ 20-pin, red
18 - ECM connector A
^ 12-pin, black
19 - ECM connector D
^ 16-pin, black
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.