HEADLAMP AUTOMATIC LEVELLING MOTOR DRIVE TEST


caution
  • The levelling motor drive test of headlamp levelling unit shall be performed with the vehicle at a standstill (When a vehicle speed signal is input from the headlamp automatic levelling ECU, the levelling motor drive test cannot be performed).

1.Using the special tool diagnosis code check harness (MB991529), earth the diagnosis connector terminal No. 1 (diagnosis control terminal).
2.Turn the ignition switch to the ON position.
3.Turn ON the headlamp switch.
4.Check that the headlamp levelling operates downward for 3 seconds.
note
  • When the levelling of the headlamp faces downward at the time of drive test start, it stays as is.
  • Only one drive test is possible after the ignition switch is turned to the ON position.
5.Check that the headlamp levelling operates upward for 3 seconds.