Checking the pressure reducing valve
1. At low crankshaft speeds, the pressure reducing valve closes the bypass channel under the action of a spring. At high speeds, oil pressure increases, the oil pressure force overcomes the spring force, the pressure reducing valve opens, and excess oil returns through the bypass channel back to the oil pan.
2. Checking the pressure reducing valve.
- A) Use a wooden rod to press the valve plug and check that the plug moves to its original position without binding. If a sticky valve plug is found, replace the valve.
- b) Check the condition of the pressure reducing valve spring (no breakage or deformation).
Checking the sensor-switch for engine oil pressure and its circuit
1. Check that the low engine oil pressure indicator lights up when the ignition is on (ignition key in position "ON"), and then goes out when the engine is cranked by the starter or the engine is idling.
Note: If the low engine oil pressure indicator does not light up. then the lamp may have burned out or the wiring is faulty.
Engine oil pressure when engine is idling (oil temperature 75-90°C):
- 2.0L / 2.4L engines: 80 kPa
- 2.7L engine: 50 kPa or more
2. Checking the sensor-switch for engine oil pressure.
- A) Using an ohmmeter, check for a closed circuit between the terminal and the sensor-switch housing. If the circuit is open, replace the sensor switch.
- b) Insert thin rod (or wire) into the opening of the sensor-switch and lightly push it inwards. If the circuit is closed between the output and the sensor switch housing with the rod inserted, then replace the sensor switch.
- V) If the circuit between the output and the body of the sensor-switch is open, when a pressure of 50 kPa is applied to the diaphragm of the sensor-switch through the hole, then the sensor-switch is working.
- G) Check for air pressure leaks. If air pressure leaks are present, the diaphragm is broken. Replace sensor switch.
Activation pressure of the sensor-switch:
- 2.0L/2.4L engines: 14.7-29.4 kPa
- 2.7L engine: 20-40 kPa
3. Install the engine oil pressure switch.
Apply the specified sealant to the threads of the oil pressure switch, then with a tool head (24 mm) install it on the cylinder block (engines 2.0 l / 2.4 l) or oil pan (engine 2.7 l) and tighten the sensor to the rated torque.
Note: Do not exceed the rated torque when tightening the oil pressure switch.
Sealant:
- 2.0L / 2.4L engines: Three Bond 1104 or equivalent
- Engine 2.7L: Three Bond 1141E, 3M ATD #8660 or equivalent
Torque:
- 2.0L / 2.4L engines: 8-12 Nm
- 2.7L engine: 15-22 Nm