Fuel Charging Wiring Harness Removal / Installation - 3.0L: Removal

Disconnect the negative battery cable. See BATTERY DISCONNECT .
Remove the upper intake manifold. See INTAKE MANIFOLD UPPER REMOVAL / INSTALLATION - 3.0L .
Disconnect the engine coolant temperature (ECT) sensor, the water temperature indicator sender unit and the camshaft position (CMP) sensor electrical connectors.

Fig 1: Disconnecting Engine Coolant Temperature Sensor
Courtesy of MAZDA MOTORS CORP.
Disconnect the crankshaft position (CKP) sensor electrical connector.

Fig 2: Disconnecting Crankshaft Position Sensor Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the mass air flow (MAF) sensor electrical connector.

Fig 3: Disconnecting Mass Air Flow Sensor Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the fuel injectors electrical connectors.

Fig 4: Locating Engine Control Sensor Wiring To Fuel Injectors
Courtesy of MAZDA MOTORS CORP.
Disconnect the heated oxygen sensor electrical connectors.

Fig 5: Disconnecting Heated Oxygen Sensor Electrical Connectors
Courtesy of MAZDA MOTORS CORP.
Disconnect the oil pressure sensor electrical connector.

Fig 6: Locating Oil Pressure Sensor Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the two transmission harness electrical connectors.

Fig 7: Disconnecting Transmission Harness Electrical Connectors
Courtesy of MAZDA MOTORS CORP.
Disconnect the powertrain control module (PCM) electrical connector.

Fig 8: Disconnecting Powertrain Control Module (PCM) Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Remove the nut.

Fig 9: Removing Nut
Courtesy of MAZDA MOTORS CORP.
Remove the stud bolt and the ground strap.

Fig 10: Removing Stud Bolt And Ground Strap
Courtesy of MAZDA MOTORS CORP.
Remove the engine control sensor wiring.