Signal pickup and activation module (SAM) left front (N10/1) and electronic ignition lock control module (N73) both control the turn signals function and they have to be in perfect working condition.
Turn signals function can be checked using HHT. Turn signals function test with HHT can be conducted through:
Signal pickup and activation (SAM) control module (N10/1),
Electronic ignition lock control module (N73)
There are following functions to choose from:
1. Control module version coding
2. Diagnostic Trouble Code (DTC) Memory
3. Actual values
To prevent damage to the control modules, the connectors on the control modules must only be removed or connected with the ignition OFF .
Test step/Test sequence
Possible cause/Remedy 1)
Function test turn signal
Ignition switch in position 2
Turn signal switch into right turn signal position
All right turn signal lamps flash. Control lamp in the instrument claster flashe and turn signal audio device sounds
Repet above step for left turn signal
Function test hazard flasher
Switch hazard flasher ON
Turn signal lamps, hazard flasher switch and control lamps in instrument cluster flash. Signal audi device sounds.
Function test turn signal lamp failure
Remove turn signal lamp (E3e1 or E4e1), ignition switch in position 2. Switch turn signal to the right.
Remaining right turn signal lamps must flash at higher frequency (3 Hz insteadt of 1.5 Hz).