Overview - High Beam Assist

The high beam assist turns the high beams on and off automatically depending on the surrounding traffic conditions and the vehicle speed. The Light Recognition Sensor -G399- inside the rearview mirror base and the Automatic High Beam Assist Control Module -J844- inside the interior rearview mirror control it.

Switching on the high beam assist:

• Ignition switched on
• Turn the Rotary Light Switch -EX1- to the AUTO  position
• Press the turn signal lever to the high beam position.

The high beam assist will switch off when the ignition is turned off.

The high beam assist may not switch off at the right time or not at all under the following conditions:

• On poorly lit streets with street signs that are highly reflective
• For other motorists that are not easily seen (pedestrians, and bicyclists).
• Narrow curves, on-coming traffic partially covered, steep hills.
• On-coming vehicles on streets with a center barrier, when the driver can see clearly over the barrier (truck drivers).
• For faulty high beam assists.
• Fog, snow and heavy rain
• Dust and sand
• Stone impact in the field of vision for the Light Recognition Sensor -G399-.
• The field of vision of the Light Recognition Sensor -G399- is fogged up, dirty or covered by a sticker, snow or ice.

Malfunction Recognition and Malfunction Indicator

The high beam assist is equipped with OBD.

For troubleshooting, use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function.