2. Connect the MUT-II device to the diagnostic connector.
3. Remove the timing belt cover of the gas distribution mechanism.
4. Turn the crankshaft clockwise and set the piston of the 1st cylinder to TDC in the compression stroke.
5. Turn on the ignition and select the "Belt tension measurement" item on the MUT-II device screen.
6. Loosen the lock nut securing the timing belt tensioner mechanism.
7. Rotate the M6 bolt to adjust the tension of the timing belt.
8. Position the microphone (MB991668) in the location indicated by the arrow in Figure 4.4, perpendicular to the surface of the belt (at an angle of ±15°) at a distance of approximately 10-20 mm from the back surface of the belt.
9. Using your hand, gently press the belt between the pulleys at the location indicated by the arrow in Figure 4.4 and check that the belt oscillation frequency matches the nominal value.
Timing belt oscillation frequency: 90+15 Hz
Fig. 4.4. Location of the microphone when checking the tension of the timing belt
Warnings
- (1) The belt surface temperature should be as close to normal temperature as possible.
- (2) Do not allow foreign particles such as water or oil to enter the microphone.
- (3) The measurement results will not correspond to the actual value if the microphone is affected by strong wind or noise sources located nearby.
- (4) When measuring, do not allow the belt to touch the microphone, otherwise the measurement results will not match the actual value.
- (5) Do not perform measurement on a vehicle with the engine running.
Original material on the website MitsubishiMan