1994 Audi S4FACTORY OEM SERVICE PROCEDURE

Connector Identification

Identifying Camshaft Position Sensor Wiring Harness Connector Terminals [IMAGE: http://127.0.0.1:8080/images25/G00149775/] Courtesy of AUDI OF AMERICA, INC. Fig 2: Identifying Crankshaft Position, Engine Speed, Knock & Pressure Sensor Wiring Harness Connector Terminals [IMAGE: http://127.0.0.1:8080/images25/G93D80997/] Courtesy of AUDI OF AMERICA, INC. Fig 3: Identifying Fuel Injector, ECT Sensor, EVAP Canister Purge Valve, HO2S Heater & IAC Wiring Harness Connector Terminals [IMAGE: http://127.0.0.1:8080/images25/G96D09931/] Courtesy of AUDI OF AMERICA, INC. Fig 4: Identifying Engine Speed & Knock Sensor Connector Terminals (Sensor Side) [IMAGE: http://127.0.0.1:8080/images25/G93J80993/] Courtesy of AUDI OF AMERICA, INC. Fig 5: Identifying Location Of HO2S Signal Control & Heater Harness Connector [IMAGE: http://127.0.0.1:8080/images25/G00149776/] Courtesy of AUDI OF AMERICA, INC. Fig 6: Identifying Ignition Coil Power Output Stage 4-Pin Wiring Harness Connector Terminals [IMAGE: http://127.0.0.1:8080/images25/G96F09927/] Courtesy of AUDI OF AMERICA, INC. Fig 7: Identifying MAF & TP Sensor 6 Pin Wiring Harness Connector Terminals [IMAGE: http://127.0.0.1:8080/images25/G96H09933/] Courtesy of AUDI OF AMERICA, INC. Fig 8: Identifying TP Sensor Terminals (Sensor Side) [IMAGE: http://127.0.0.1:8080/images25/G93A80994/] Courtesy of AUDI OF AMERICA, INC.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.