Charging System (Diagnostics & Symptom Tests): Other Lexus IS II facelift 2

PRECAUTION [08/2012 - ]

1. Check that the battery cables are connected to the correct terminals.
2. Disconnect the battery cables when the battery is given a quick charge.
3. Do not perform tests with a high voltage insulation resistance tester.
4. Never disconnect the battery while the engine is running.
5. Check that the charging cable nut is tightened on terminal B of the generator and the engine room R/B.

Scheme 18

Scheme 19

Scheme 20

PROCEDURE

1. CHECK LOCK FUNCTION OF CLUTCH PULLEY Check the lock function with the pulley installed in the vehicle. Visually check that the rotor in the generator operates with the engine started. Check the lock function with the pulley removed from the vehicle. Remove the generator pulley cap. Using SST, hold the generator rotor. Turn the clutch pulley clockwise and check that the outer ring locks. OK The outer ring locks. SST: 09820-63021 NG --> REPLACE CLUTCH PULLEY OK: Go to next step
2. CHECK INSTALLATION OF CLUTCH PULLEY Start the engine and visually check looseness of the clutch pulley. OK The clutch pulley is not loose. NG --> TIGHTEN CLUTCH PULLEY TO THE SPECIFIED TORQUE OK --> REPLACE GENERATOR ASSEMBLY

1. CHECK LOOSENESS OF V-RIBBED BELT Check the tension of the belt by pushing it down with a finger. OK The tension of the belt is enough. NG --> REPLACE V-RIBBED BELT TENSIONER ASSEMBLY OK: Go to next step
2. CHECK V-RIBBED BELT FOR WEAR Check the V-ribbed belt for wear. OK The V-ribbed belt is not worn. NG --> REPLACE V-RIBBED BELT OK: Go to next step
3. CHECK CLUTCH PULLEY FOR WEAR Check the clutch pulley groove for wear or other defects. OK The clutch pulley groove is not damaged. NG --> REPLACE CLUTCH PULLEY OK: Go to next step
4. CHECK THAT NOISE WHILE CLUTCH PULLEY IS OPERATING Perform a road test and check if noise occurs when decelerating. OK Noise does not occur. NG --> REPLACE CLUTCH PULLEY OK --> REPLACE GENERATOR ASSEMBLY