The 2002 Acura RSX Type S Manual Engine Wiring Harness is a critical component that connects the vehicle's electrical systems to the K20A2 engine. This OEM harness facilitates communication between the ECU, sensors, ignition system, fuel injectors, and other engine components. Designed specifically for manual transmission models with the 2.0L i-VTEC engine, it ensures proper electrical connectivity for optimal performance and reliability. Below are key sections covering features, installation, specifications, troubleshooting, and maintenance.
Key components: Engine Control Unit connectors, sensor interfaces, ignition coil connectors, fuel injector plugs, ground points, and transmission speed sensor connections.
| Feature | Description |
|---|---|
| ECU Connector | 32-pin main ECU interface for engine management |
| Ignition Coil Connectors | 4 individual connectors for coil-on-plug ignition |
| Fuel Injector Plugs | 4-wire connectors for sequential fuel injection |
| Sensor Interfaces | CAM, CKP, MAP, TPS, ECT, O2 sensor connections |
| Ground Points | Multiple engine ground locations for proper grounding |
| Transmission Connectors | Speed sensor and reverse light switch connections |
| Main Relay Connection | PGM-FI main relay power distribution |
| Alternator Connector | Charging system integration |
| Starter Motor Connection | Starter solenoid activation circuit |
| Engine Bay Routing | Pre-formed harness routing with factory clips |
Disconnect battery before installation. Route harness following factory path.
WARNING! Always disconnect battery before working on electrical systems. Use proper anti-static precautions.
The harness utilizes various connector types for different systems and components.
| Component | Connector Type | Pin Count |
|---|---|---|
| ECU Main | Sumitomo MT | 32-pin |
| Ignition Coils | Sumitomo 090 | 4-pin |
| Fuel Injectors | Sumitomo 090 | 4-pin |
| Cam Position Sensor | Sumitomo 090 | 3-pin |
| Crank Position Sensor | Sumitomo 090 | 3-pin |
| MAP Sensor | Sumitomo 090 | 3-pin |
| Throttle Position Sensor | Sumitomo 090 | 3-pin |
| O2 Sensors | Special heated oxygen sensor | 4-pin |
Main circuits include power distribution, sensor feedback, actuator control, and communication lines.
Note: Refer to factory service manual for complete wiring diagrams and pinouts.
Specific to 2002 Acura RSX Type S with manual transmission and K20A2 engine.
CAUTION! Using incorrect harness may cause electrical damage or engine malfunction.
Regular inspection and proper handling ensure long-term reliability.
Tip: Use zip ties sparingly and follow factory routing to prevent damage.
Electrical system safety is critical when working with engine wiring harness.
WARNING! Incorrect installation may cause electrical fires or component damage.
This harness meets OEM specifications and complies with automotive electrical standards including SAE J1128 for low voltage cable and ISO 6722 for road vehicle cables. Manufactured to meet or exceed original equipment performance and safety requirements. Copyright © 2002 Honda Motor Co., Ltd. For technical support, contact Acura customer service or visit www.acura.com.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Main relay connection, ECU power | Check main relay circuit, verify ECU power and grounds |
| Misfire or rough idle | Coil or injector connections | Inspect coil and injector connectors for proper seating |
| Sensor communication errors | Damaged sensor wires | Check sensor circuit continuity and reference voltage |
| Check engine light | Open or short circuits | Scan for DTCs and check corresponding circuits |
| Intermittent electrical issues | Poor grounds, damaged insulation | Inspect ground connections and harness for damage |
Diagnostic Tip: Use factory service manual and proper diagnostic equipment for accurate troubleshooting.
Service Support: Contact Acura dealership or certified technician for complex electrical issues.