Turn Signals: Description and Operation

Component Identification:

Function sequence
Function prerequisites:
- Ignition: ON
- Combination switch (S4) switched to left or right turn signal position.

1 The position (1) of the combination switch is read in by the jacket tube module (N80).
2 The jacket tube module generates the turn signal message and transfers it via a signal (2, 2a, 3) on the CAN bus to the
- instrument cluster (A1),
- left front SAM control module (N10/6),
- right front SAM control module (N10/7),
- rear SAM control module (N10/8),
- trailer recognition control module (N28/1),
- left front door control module (N69/1),
- right front door control module (N69/2) and
- upper control panel control module (N72/1).
3 The instrument cluster (A1) actuates the audible turn signal indicator (A1h2) as well as the left or right turn signal indicator lamps (A1e1, A1e2).
4 The left front SAM control module (N10/6), right front SAM control module (N1O/7) and rear SAM control module (N10/8) actuate the following lights depending on the requirements:
- left front turn signal lamp (E1e5) and
- left rear turn signal lamp (E3e1),
or
- right front turn signal lamp (E2e5) and
- right rear turn signal lamp (E4e1).

5 The left front door control module (N69/1) and right front door control module (N69/2) actuate the following lamps depending on the requirements:
- left exterior mirror turn signal lamp (E6/5) or
- right exterior mirror turn signal lamp (E6/6).

6 The trailer recognition control module (N28/1) actuates the trailer turn signal lamps via the trailer hitch socket (13-pin, X58).


NOTE: If one of the bulbs in the actuated turn signal lamps is burned out, the flashing frequency of the left or right turn signal indicator lamp in the instrument cluster doubles. The flashing frequency of the turn signal lamps itself remains unchanged.

If the hazard warning flashers are switched on at the same time as the turn signals, the turn signals have priority.