MAF sensor clean
MAP sensor clean
MAP filter replacement
LandCruiser 200 MAF, MAP and IAT sensor cleans and MAP filter replacement
Step 1: Clean the MAF sensor
- Unclip and disconnect the wiring from the MAF sensor;
- Using a phillips-head screwdriver, carefully remove the two screws holding the MAF sensor, and remove the sensor;
- Thoroughly spray the MAF sensor with MAF sensor cleaner;
- Put the sensor aside and allow it to dry for 15-30 minutes;
- Slip the sensor back into the airbox lid;
- Refit the two screws;
- Reattach the wiring harness, and clip it back into place.
Step 2: Remove the Intercooler
- Remove the two nuts and lift off the plastic intercooler cover;
- Remove the front two intercooler mounting nuts;
- Remove the four nuts on the intercooler outlet flanges;
- Loosen the two hose clamps on the inlet hoses;
- Using a 10mm spanner, remove the rear intercooler cover mounting bracket, which will then give access to removing the remaining two 12mm mounting nuts located behind the intercooler;
- You can then move the intercooler slightly towards the front of the vehicle;
- Disconnect the MAP and temperature connectors, and the small vacuum hose between the MAP sensor and its filter;
- With these disconnected, you can remove the intercooler from the vehicle.
Step 3: Clean the MAP and IAT sensors and replace the MAP filter cartridge
- Disconnect the vacuum hose from the MAP sensor, and give the sensor and plug a good spray with MAF sensor cleaner.
- Using a 22mm socket, remove the intake air temperature sensor and give it a clean with the MAF spray;
- Allow the cleaner to evaporate from the sensors for about half an hour;
- While the sensors are drying, move back to the vehicle and remove the old MAP sensor filter from its spring mount and disconnect the vacuum hose;
- Install the new MAP filter into the bracket and reconnect the tube.
NOTE: If the vacuum hose is not reconnected properly (or split/damaged) the vehicle will suffer from severe loss of power, although no fault codes will be present. Reconnecting or replacing the hose will solve the problem.
Step 4: Refit the intercooler
- Sit the intercooler just in front of its final location, then reconnect the vacuum hose between the sensor and the filter, followed by the black MAP sensor plug and the grey intake air temperature plug;
- Move the intercooler back into its correct location, lining up the outlet flanges;
- Slip the inlet pipes into the rubber hoses and tighten the hose clamps;.
- Refit the four intercooler mounting nuts and the four nuts on the intercooler outlet flanges (Torque: 21Nm);
- Refit the rear intercooler cover bracket using the 10mm ring spanner (Torque: 9Nm);
- Refit the intercooler cover and tighten the two mounting nuts (Torque: 8Nm)
Step 5: Test Drive / Troubleshooting
Start the engine and take the vehicle for a test drive to ensure performance is correct and there are no fault codes or warning lights.
If there are engine trouble codes/warning lights:
- Ensure all sensors are properly reconnected.
- A fault with the MAF sensor can cause codes P0100, 0101, 0102, 0103.
- A fault with the MAP sensor can cause codes P0105, 0106, 0107, 0108.
- A fault with the IAT sensor can cause codes P0110, 0112, 0113.
If performance is poor but there are no fault codes/warning lights:
- Check the small vacuum hose between the MAP sensor and filter. It is likely damaged or disconnected.