Inspection point |
Topic / fault symptom |
Initial state |
Instruction to technicians |
Question to technicians |
Measures for technicians |
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1 |
Power supply/power management |
Insert handset in the eject box |
Run terminal change from terminal 0 to terminal R |
Does the handset switch on? Is the connection to the control unit set up? |
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YES ==> |
OK; no other measures required |
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NO ==> |
Continue with inspection point 2 |
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2 |
Power supply/power management |
Terminal 15 |
Check fuse for the telephone |
Fuse OK? |
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YES ==> |
Continue with inspection point 3 |
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NO ==> |
Replace fuse and repeat inspection point 1 |
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3 |
Power supply/power management |
Terminal 15 |
Measure at telephone control unit |
Are the voltage supplies present? |
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YES ==> |
Continue with inspection point 4 |
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NO ==> |
Check wiring harness; repeat inspection point 1 |
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4 |
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5 |
Power supply/power management |
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Read out defect code memory |
Are entries stored in the fault code memory? |
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YES ==> |
Continue with inspection point 6 |
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NO ==> |
OK |
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6 |
Power supply/power management |
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Erase fault memory; switch in control unit once again; read fault code memory |
Do entries recur?
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YES ==> |
Replace TCU control unit |
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NO ==> |
OK |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
Handset, battery frequently run down |
Terminal 15 active |
Customer discussion |
Query to customer: Is the handset often taken out of the eject box? Are only short trips driven (short charging times)? |
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YES ==> |
Note for customers: Leave handset in eject box; possibly increase after-run time of the TCU on the handset in order to be able to charge longer after parking the vehicle |
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NO ==> |
Continue with inspection point 15 |
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15 |
Handset, battery frequently run down |
Handset not placed in eject box and switched off |
Check power supply: Activate terminal 15, place handset in eject box/drawer |
Does the handset switch in when placed in the eject box? Does the battery display in the handset flash? |
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YES ==> |
Power supply and handset OK; as remedy, only inspection point 14 possible |
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NO ==> |
Continue with inspection point 16 |
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16 |
Handset, battery frequently run down |
Terminal 15 active |
Check voltage of the eject box with voltage measuring equipment (orientation: viewed from above and contacts facing downwards: on the right B+ ground in the centre) |
Is the voltage supply present?
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YES ==> |
Power supply and wiring eject box/drawer OK; continue with inspection point 17 |
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NO ==> |
Check wiring of eject box; if appropriate, replace eject box |
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17 |
Handset, battery frequently run down |
Terminal 15 active |
Check function of eject box with replacement handset |
Is the replacement handset charged? |
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YES ==> |
Replace customer handset |
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NO ==> |
Replace eject box; continue as of inspection point 15 |
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29 |
Handset, no display illumination |
Terminal 15 active |
Switch on terminal 58g; set instrument dimmer to max. |
Display illumination OK |
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YES ==> |
No further measures |
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NO ==> |
Continue with inspection point 30 |
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18 |
Reception, sustained low level display |
Terminal 15 active |
Check network (card D1/D2/ e-plus); check level display in HMI/on handset |
Is the displayed level lower than the normal value (past value) of the corresponding network? |
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YES ==> |
Continue with inspection point 19 |
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NO ==> |
OK |
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19 |
Reception, sustained low level display |
Terminal 15 active |
Run an aerial test |
Is the aerial cable on the control unit and at the aerial correctly connected? |
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YES ==> |
Replace control unit TCU; if necessary, run test with test aerial on control unit |
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NO ==> |
Remedy fault in aerial/aerial supply line |
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20 |
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21 |
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22 |
SIM card, SIM card is not recognized |
Terminal 15 active |
Check with test SIM card |
Is the card read by the control unit? |
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YES ==> |
Customer card defective |
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NO ==> |
Continue with inspection point 23 |
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23
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SIM card, SIM card is not recognized
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Terminal 15 active
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Replace eject box (card reader)
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Function fulfilled with new eject box? |
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YES ==> |
OK; replace customer eject box |
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NO ==> |
Continue with inspection point 24 |
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24 |
SIM card, SIM card is not recognized |
Terminal 15 active |
Check cable/plug contact between eject box and control unit TCU |
Fault detected? |
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YES ==> |
Replace cable/plug-in contact |
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NO ==> |
Replace control unit |
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25 |
Handset, handset shows no telephone functions |
Terminal 15 active |
Read out TCU fault code memory |
Bluetooth fault code memory entries present? |
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YES ==> |
Replace TCU control unit |
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NO ==> |
Continue with inspection point 26 |
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26 |
Handset, handset shows no telephone functions |
Terminal 15 active |
Start the following menu items: - Main menu - Bluetooth - Base station - Re-connect |
Is the connection with TCU successfully set up? |
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YES ==> |
Handset and pairing with TCU OK; no other measures required |
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NO ==> |
Check base aerial/cable |
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27 |
Handset, handset shows no telephone functions |
Terminal 15 active |
Check base aerial/cable to TCU |
Base aerial / cable OK? |
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YES ==> |
Check other handset; continue with inspection point 28 |
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NO ==> |
Correct connection; repeat inspection point 26 |
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28 |
Handset, handset shows no telephone functions |
Terminal 15 active |
Open the following menu items on other handset: - Main menu - Bluetooth - Base station - Re-connect |
Is the connection with TCU successfully set up? |
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YES ==> |
Replace customer handset; repeat inspection point 26 |
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NO ==> |
Check control unit TCU; replace if necessary |
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30 |
Handset, no display illumination |
Terminal 15 active |
Switch on terminal 58g; set instrument dimmer to max. |
Nighttime design lighting on other components OK? |
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YES ==> |
Check supply wire 58g to control unit TCU; continue with inspection point 31 |
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NO ==> |
Check dimmer; no telephone fault! |
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31
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Handset, no display illumination
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Terminal 15 active
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Switch on terminal 58g; set instrument dimmer to max.
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Cable 58g to control unit present? |
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YES ==> |
Check function of TCU using test handset; continue with inspection point 32 |
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NO ==> |
Correct cable/plug-in contact |
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32
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Handset, no display illumination
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Terminal 15 active
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Switch on terminal 58g; set instrument dimmer to max.; pair replacement handset with TCU
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Function ensured with replacement handset?
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YES ==> |
Replace customer handset |
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NO ==> |
Replace control unit TCU; pair customers handset with replacement TCU |
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33 |
Hands-free mode, no hands-free function |
Switch on terminal 15 |
Set up a voice connection with handset in cradle (hands-free mode) |
Audio output present?
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YES ==> |
OK; no other measures required |
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NO ==> |
Check LF signal at 54-pin connector with oscilloscope; continue with inspection point 34 |
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34 |
Hands-free mode, no hands-free function |
Switch on terminal 15 |
Check LF signal at 54-pin connector with oscilloscope |
LF signal present?
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YES ==> |
Check LF-on signal; continue with inspection point 35 |
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NO ==> |
Replace control unit TCU; pair customers handset with replacement TCU |
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35 |
Hands-free mode, no hands-free function |
Switch on terminal 15 |
Check LF-on signal at 54-pin connector with oscilloscope |
LF-on signal present?
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YES ==> |
Check and correct cables/plug-in contacts between TCU and radio |
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NO ==> |
Continue with inspection point 45 |
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36 |
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37 |
Eject box, no button illumination on eject button |
Terminal 15 active |
Switch on terminal 58g; set instrument dimmer to max. |
Button illumination OK? |
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YES ==> |
No other measures required |
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NO ==> |
Continue with inspection point 38 |
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38 |
Eject box, no button illumination on eject button |
Terminal 15 active |
Switch on terminal 58g; set instrument dimmer to max. |
Nighttime design lighting on other components OK? |
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YES ==> |
Check supply wire 58g to eject box; continue with inspection point 39 |
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NO ==> |
Check dimmer; no telephone fault! |
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39 |
Eject box, no button illumination on eject button |
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Switch on terminal 58g |
Cable 58g to eject box present? |
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YES ==> |
Replace eject box; repeat inspection point 37 |
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NO ==> |
Correct cable/plug-in contact |
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40 |
HMI, no telephone functions in vehicle HMI (instrument cluster, MFL, radio, MID, BM, display) |
Terminal 15 active |
Open telephone HMI |
Are telephone functions displayed? |
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YES ==> |
OK; no other measures required |
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NO ==> |
Read ID using diagnosis; continue with inspection point 41 |
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41 |
HMI, no telephone functions in vehicle HMI (instrument cluster, MFL, radio, MID, BM, display) |
Terminal 15 active |
Read ID using diagnosis |
Does control unit respond? |
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YES ==> |
Replace HMI |
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NO ==> |
Bus fault; check plug-in contacts/cables |
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42 |
HMI, no telephone functions in vehicle HMI (instrument cluster, MFL, radio, MID, BM, display) |
Terminal 15 active |
Check plug-in contacts/cables |
Plug-in contacts/cables OK |
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YES ==> |
Replace control unit/TCU |
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NO ==> |
Correct plug-in contacts/cables |
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43 |
Hands-free mode, no change between privacy and hands-free |
Terminal 15 active |
Check setting in the handset for ”automatic hands-free mode” |
Is ”automatic hands-free mode” activated in the handset? |
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YES ==> |
Check hands-free mode; continue with inspection point 33 |
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NO ==> |
Change setting in the handset to ”automatic hands-free mode” |
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44 |
SMS, no reception of SMS possible |
Terminal 15 active |
Check whether sufficient memory capacity for other SMS is available |
Is sufficient memory capacity available? |
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YES ==> |
Should not occur; if necessary, replace control unit |
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NO ==> |
Delete SMS |
45 |
Hands-free mode, no hands-free function |
Switch on terminal 15 |
Check microphone connection |
Audio input present? |
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YES ==> |
OK |
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NO ==> |
Replace control unit TCU; pair customers handset with replacement TCU |
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46 |
Browser, browser unable to establish a connection |
Terminal 15 active |
Check basic functionality of telephone |
Telephone connection possible? |
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YES ==> |
Problem with browser service instructions specified |
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NO ==> |
Check basic functionality of telephone: run inspection points 1 to 6 and 18 to 24 |
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47 |
Telematic, limited/no Telematic MMI |
Terminal 15 active |
Check whether option 612 is coded |
Is option 612 coded? |
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YES ==> |
Check whether it is initialized |
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NO ==> |
Encode and initialize if ordered |
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48
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Telematic, limited Telematic MMI
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Terminal 15 active
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Check whether function is initialized
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Is Telematic initialized? |
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YES ==> |
Deactivate and reinitialize (through MMI) |
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NO ==> |
Initialize (through MMI) |
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49 |
Telematic, initialization not possible |
Terminal 15 active |
Check whether GPS signal is present (DTC) |
Is GPS hidden (and sky visible)? |
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YES ==> |
Is GPS being received? |
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NO ==> |
Repair GPS connection |
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50 |
Telematic, initialization unsuccessful |
Terminal 15 active |
Check login at service provider |
Is VIN correctly encoded and registered with provider? |
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YES ==> |
Call hotline |
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NO ==> |
Correct encode VIN; initialize once again |
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51 |
Telematic, limited Telematic functions (e.g. no V information) |
Terminal 15 active |
Check customer SIM card type |
Is customer SIM card supported (D1/D2)? |
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YES ==> |
Check whether SMS memory capacity is free |
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NO ==> |
The customer must leave out the SIM card (thus Telematic SIM) or by another card |
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52 |
Telematic, limited Telematic functions (e.g. no V information) |
Terminal 15 active |
Check SMS memory capacity |
Is the customer SIM card SMS memory full? |
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YES ==> |
Delete SMS to customer SIM |
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NO ==> |
Check list of supported services in the MMI |
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53 |
Telematic, limited Telematic functions (e.g. no V information) |
Terminal 15 active |
Check whether V information is in the list of present services |
Is service enabled?
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YES ==> |
Register with service provider hotline |
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NO ==> |
Update (by MMI) with customer SIM card present |
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54 |
Telematic, emergency call not possible |
Terminal 15 active |
Check whether button is connected |
Is emergency call LED visible at ignition on (2 seconds)? |
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YES ==> |
Check switch connection per diagnosis |
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NO ==> |
Emergency call button cable fault |
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55 |
Telematic, emergency call not possible |
Terminal 15 active |
Check whether it is switched on |
Is emergency call function switched on? |
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YES ==> |
Check telephone hands-free mode |
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NO ==> |
Check ”master bit” per diagnosis |
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56 |
Telematic, positioning to service provider incorrect |
Terminal 15 active |
Check whether GPS is hidden |
Is GPS connection OK? |
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YES ==> |
Check whether dead reckoning is defective |
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NO ==> |
Switch on ”master bit” per diagnosis |
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57 |
Telematic, positioning to service provider incorrect, only in city |
Terminal 15 active |
Check whether dead reckoning signals are defective |
Are TCU DFA cables OK? |
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YES ==> |
Replace TCU |
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NO ==> |
Repair |
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58 |
Telematic, ”hotline”/”Roadside assistance”/”Home dealer” no data exchange |
Terminal 15 active |
Check whether it is initialized |
Is Telematic initialized? |
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YES ==> |
Deactivate and reinitialize (through MMI) |
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NO ==> |
Initialize (through MMI) |
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59 |
Telematic, no ”hotline”/”Roadside assistance”/”Home dealer” softkey |
Terminal 15 active |
Non-Telematic services only with customer SIM card |
Customer SIM card present? |
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YES ==> |
Check fixed numbers |
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NO ==> |
Insert test SIM |
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60
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Telematic, no ”hotline”/”Roadside assistance”/”Home dealer” softkey
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Terminal 15 active
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Check fixed numbers
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Are telephone numbers correctly programmed (also correct format)? |
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YES ==> |
Check hands-free mode |
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NO ==> |
Program telephone numbers once again (per diagnosis) |
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61 |
Telematic, no ”hotline”/”Roadside assistance”/”Home dealer” softkey |
Terminal 15 active |
Non-Telematic services only with customer SIM card |
Customer SIM card present?
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YES ==> |
Check MOST connection |
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NO ==> |
Program telephone numbers once again (per diagnosis) |
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62 |
Telematic, incorrect vehicle profile in the MMI |
Terminal 15 active |
Code TCU (correct VIN in the TCU) and re-initialize Telematic services |
Still incorrect profile? |
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YES ==> |
Report to hotline of the service provider |
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NO ==> |
Done |