M01-P1 Harness

Products that can use this harness

• Mercury 3

 

History

• This old-style Level 1 harness was part of the economy series for Mercury and some people still prefer them today to save on expenses. The harness contains most ECU connections from the 12 Way Connector for most engine combinations. It does not have the CAM1 and CAM2 wires required for VVTI sensors.
• It has Crank TDC and CAM Home signals which is required for Full Sequential features.

 

Design Points to take Notice of.

• Crank and Cam sensor wires are enclosed in one shield. They share common power and earth wires. This is suitable for complex Distributor type pickups where the sensors are close together. If you use this harness where the sensors is apart you may need to splice in a separate shielded wire for the other sensor. Connect the shields together for interference protection on the spliced section. Alternatively use the M06-P1 harness instead where the 2 signals have separate shielded wires.
• TPS, Air and Water sensors also share a shielded wire. Take the shielded part as close to the sensors as possible. They share common earth wires. Solder these connections and insolate them properly.
• All the input wires are shielded and are earthed on the ECU side with the small black lead that must be connected to the ECU earth. Never connect a shield on the engine or chassis of the car.

 

Wire Names and connections on this harness:

Crank (Shielded) contains:

• Crank Sensor (Green)
• Cam Sensor (Yellow)
• +12V Ignition (Red)
• Earth (Blue)

 

Map (Shielded)

• Map Sensor (Blue)
• +5V (Red)
• Earth (Black)

 

Engine (Shielded)

• Water Temperature Sensor (Green)
• Air Temperature Sensor (Yellow)
• TPS Sensor (Blue)
• +5V (Red)
• Earth (Black)
• Earth (White)

 

Lambda (Shielded)

• Lambda Sensor (Red)
• Earth (Blue)

 

Ignition Power (Orange)

TPS Output signal for TCU or other systems (Yellow)

Earth Wire for Screens and sensors (Black)