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Diagnostic Manual, Info./Comm., Volume 1

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LOCATION:    12.2 Signaling Device (SD) - Hazard, Turn Signals   >   11 Diagnosis - Function Test

Diagnosis - Function Test

Function Test Explanation

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)
Flasher function

There are following functions to choose from:

1. Control module version coding
2. Diagnostic Trouble Code (DTC) Memory
3. Actual values
4. Activation

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 Test condition Nominal value 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 As above  
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).  
  Repet above step for left turn signal As above  
1) Observe Preparation for Test, see 22 .