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 MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - INTRODUCTIONCONNECTOR IDENTIFICATION
1998 Audi A4 Avant Quattro, Automatic
Connector Identification
1998 Audi A4 Avant Quattro, AutomaticSECTION Connector Identification
CONNECTOR IDENTIFICATION DIRECTORY
| Connector | See Fig |
|---|---|
| Camshaft Position Sensor Connector Terminals | Fig 1 |
| ECT Sensor Connector Terminals | Fig 2 |
| ECT Sensor Terminals | Fig 3 |
| EGR Temperature Sensor Connector Terminals | Fig 4 |
| EGR Vacuum Regulator Solenoid Valve Connector (Harness-Side) Terminals | Fig 4 |
| Engine Speed Sensor Connector (Harness-Side) Terminals | Fig 1 |
| Engine Speed Sensor Connector (Sensor-Side) Terminals | Fig 5 |
| EVAP Canister Purge Valve Harness Connector Terminals | Fig 4 |
| EVAP Differential Pressure Sensor Connector (Harness-Side) Terminals | Fig 1 |
| EVAP Leak Detection Pump (Component-Side) | Fig 6 |
| EVAP Leak Detection Pump (Harness-Side) | Fig 7 |
| Fuel Injector Harness Connector | Fig 4 |
| HO2S Black 2-Pin Heater Connector | Fig 4 |
| HO2S Connector (Harness-Side) Terminals | Fig 8 |
| HO2S Connector (Sensor-Side) Terminals | Fig 9 |
| IAC Valve Connector Terminals | Fig 10 |
| Ignition Coil Power Output Stage 3-Pin Connector (Harness-Side) Terminals | Fig 1 |
| Ignition Coil Power Output Stage 4-Pin Connector (Harness-Side) Terminals | Fig 11 |
| Intake Manifold Change-Over Valve Connector Terminals | Fig 4 |
| Knock Sensor Connector (Harness-Side) Terminals | Fig 1 |
| Knock Sensor Connector (Sensor-Side) Terminals | Fig 5 |
| MAF Sensor Connector Terminals A4 (1.8L Turbo) | Fig 12 |
| A4 (2.8L) & Cabriolet | Fig 1 |
| Secondary Air Injection Solenoid Valve Harness Connector | Fig 4 |
| TP Sensor Connector Terminals | Fig 13 |
| TP Sensor Terminals | Fig 14 |
| Throttle Valve Control Module (TVCM) Connector Terminals | Fig 15 |
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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.