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Electronic Engine Control System - 3.0L (4V): Other Mercury Mariner II

Removal & Installation 3 illustrations ~336 words

Material

ItemSpecificationFill Capacity
High Temperature Nickel Anti-Seize Lubricant XL-2 (US); CXG-2-B (Canada)ESE-M12A4-A
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalentWSS-M2C930-A
Penetrating and Lock Lubricant XL-1 (US); CXC-51-A (Canada)

Material

Electronic Engine Controls

The electronic engine controls consist of the following

  1. PCM
  2. Engine coolant temperature (ECT) sensor
  3. Throttle position (TP) sensor
  4. Idle air control (IAC) valve
  5. Camshaft position (CMP) sensor
  6. Crankshaft position (CKP) sensor
  7. Mass air flow (MAF) sensor
  8. Heated oxygen sensor (HO2S)
  9. Catalyst monitor sensor

The PCM carries out the following functions

  1. accepts input from various engine sensors to compute the fuel flow rate necessary to maintain a prescribed air/fuel ratio throughout the entire engine operational range.
  2. outputs a command to the fuel injectors to meter the appropriate quantity of fuel.

The ECT sensor

  1. sends the PCM a signal indicating engine temperature.
  2. resistance decreases as coolant temperature increases.

The TP sensor

  1. sends the PCM a signal indicating the throttle plate angle.
  2. is the main input to the PCM from the driver.

The IAC valve

  1. controls bypass air around the throttle plate at low speeds.
  2. is controlled by the PCM.

The CMP sensor

  1. sends the PCM a signal indicating camshaft position used for fuel synchronization.

The CKP sensor

  1. sends the PCM a signal indicating crankshaft position.
  2. is essential for calculating spark timing.

The MAF sensor

  1. uses a hot wire sensing element to measure the amount of air entering the engine. Air passing over the hot wire causes it to cool.

The HO2S

  1. creates a voltage signal dependent on exhaust oxygen content.
  2. provides feedback information to the PCM used to calculate fuel delivery.

The catalyst monitor sensor

  1. monitors oxygen content after it flows through the catalytic converter.
  2. provides a voltage to the PCM used to calculate catalytic converter integrity.

Refer to the Introduction - Gasoline Engines article.

Camshaft Position (CMP) Sensor

ItemSpecification
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalentWSS-M2C930-A

Material

Scheme 26

Scheme 26
ItemPart NumberDescription
114A464Camshaft position sensor (CMP) electrical connector
2W500214CMP bolt
36B288CMP
4CMP O-ring seal

Crankshaft Position (CKP) Sensor

ItemSpecification
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalentWSS-M2C930-A

Material

Scheme 27

Scheme 27
ItemPart NumberDescription
114A464Crankshaft position (CKP) sensor electrical connector
2W500214CKP sensor bolt
36C315CKP sensor
4CKP sensor O-ring seal

Heated Oxygen Sensor (HO2S)

Special Tools Illustration Tool Name Tool Number Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

ItemSpecification
High Temperature Nickel Anti-Seize Lubricant XL-2 (US); CXG-2-B (Canada); or equivalentESE-M12A4-A
Penetrating and Lock Lubricant XL-1 (US); CXC-51-A (Canada)

Material

Catalyst Monitor Sensor

Special Tools Illustration Tool Name Tool Number Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

ItemSpecification
High Temperature Nickel Anti-Seize Lubricant XL-2 (US); CXG-2-B (Canada); or equivalentESE-M12A4-A
Penetrating and Lock Lubricant XL-1 (US); CXC-51-A (Canada)

Material

Fuel Rail Pressure and Temperature Sensor

ItemSpecification
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalentWSS-M2C930-A

Material

Scheme 28

Scheme 28
ItemPart NumberDescription
19E498Fuel rail pressure and temperature sensor vacuum hose
214A464Fuel rail pressure and temperature sensor electrical connector
3W705870Fuel rail pressure and temperature sensor bolt (2 required)
49G756O-ring seal
59G756Fuel rail pressure and temperature sensor