ON-VEHICLE SERVICE DRIVE BELT TENSION CHECK AND ADJUSTMENT GENERATOR DRIVE BELT TENSION CHECK <When using scan tool (MUT-II)> Turn the ignition switch off before connecting or disconnecting the scan tool. 1.Connect the scan tool (MUT-II) to the data link connector. 2.Connect the special tool (belt tension meter set) to the scan tool (MUT-II). 3.Turn on the ignition switch and select "Belt tension measurement" from the scan tool (MUT-II) menu screen. 4.Position the microphone (MB991668) 10 to 20 mm (0.39 to 0.79 inch) away from the middle of the drive belt between the pulleys, and hold it at right angle to the belt (within an inclination of ± 15 degree angle).

•Measure when the belt surface temperature is close to room temperature. •Make sure that water or oil, etc., does not get on the microphone. •If a strong wind blows or noise is made close to the microphone during measure, the meter will show a value that differs from the actual value. •If the measurement is taken with the microphone touching the belt, the meter will show a value that differs from the actual value. •Do not measure while the engine is running. 5.Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value. Standard value: Vibration frequency Hz A 197 - 241 B 133 - 164

<When not using scan tool (MUT-II)> Use a tension gauge to check the belt tension. Press the center of the belt between the pulleys shown in the illustration with a force of 98N (22 lb) to check the belt deflection. Standard value: Tension N (lb) 392 - 588 (88 - 132) Deflection mm (in) (reference value) A 6.5 - 8.9 (0.26 - 0.35) B 9.3 - 12.5 (0.37 - 0.49)

GENERATOR DRIVE BELT TENSION ADJUSTMENT 1.Loosen the tension pulley fixing nut. 2.With the tension pulley fixing nut temporarily tightened at 15 N·m (11 ft-lb), set the belt tension or deflection amount to the standard value using the adjusting bolt. Standard value: ITEMS DURING ADJUSTMENT DURING REPLACEMENT Vibration frequency Hz A 209 - 231 279 - 311 B 142 - 157 189 - 211 Tension N (lb) 441 - 539 (99 - 121) 784 - 980 (176 - 220) Deflection mm (in) (reference value) A 7.0 - 8.4 (0.28 - 0.33) 4.0 - 5.2 (0.16 - 0.20) B 10.1 - 11.7 (0.40 - 0.46) 6.0 - 7.4 (0.24 - 0.29) A:Measure between the cooling fan pulley and the crankshaft pulley. B:Measure between the generator pulley and the cooling fan pulley. 3.Tighten the tension pulley fixing nut. Tightening torque: 49 N·m (36 ft-lb)