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Diagnostic Manual, Info./Comm., Volume 1

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LOCATION:    3.1 Instrument Cluster (IC)    >   12 Diagnosis - Complaint Related Diagnostic Chart


Diagnosis - Complaint Related Diagnostic Chart

Complaint/Problem Possible cause Remedy/Test step
Entire radio (A2) not functioning. Power supply: Radio (A2) 23 1.0
No display in display window of radio (A2) Power supply: Radio (A2) 23 1.0
Cassette player functions in radio (A2) not working Power supply: Radio (A2) 23 1.0
Entire CD operation not functioning. Power supply radio (A2), CD changer (A2/6) 23 1.0 , 2.0 or 3.0
Left front loudspeaker not operating. Radio (A2), loudspeaker 23 4.0
Right front loudspeaker not operating Radio (A2), loudspeaker 23 5.0
Left rear loudspeaker not operating Radio (A2), loudspeaker 23 6.0
Right rear loudspeaker not operating Radio (A2), loudspeaker 23 7.0
Radio interference Radio (A2), Antenna 23 8.0
Poor radio reception Radio (A2), antenna, Reception area 23 9.0
Automatic antenna (M11) not operating Radio (A2), automatic antenna (M11) 23 10.0
Speed-sensitive volume control not operating Radio (A2), vehicle speed signal (except model 163) 23 11.0
Radio illumination not operating Radio (A2) 23 12.0
Radio mute switching when using telephone not operating Radio (A2), cellular telephone system 23 13.0

Complaint/Problem/DTC Possible cause Notes Test step/Remedy 1)
Radio:
Internal fault
  Replace radio
Radio:
Low voltage
  23 3.0

Radio:
High voltage
  2 3 3.0


Radio:
CAN B fault
  Check CAN data bus
Radio:
Automatic antenna switching circuit
  Check antenna system (ATS)
Radio:
Cassette player or cassette faulty
  Check cassette
Replace radio
Radio:
Front flap end switch - locking

Front flap end switch - openning
 
Replace radio

Replace radio

Radio:
Internal fault

CAN data bus failure
 
Replace radio

Check CAN data bus

 

Radio:
D2B Data transfer faulty
  Check connections
Check fiber optics
Radio:
Data transfer between radio and preceding D2B component
  Check connections
Check fiber optics
Radio:
D2B Data transfer faulty
  Check connections
Check fiber optics
Radio:
D2B initialization fault
  Reconfigure the D2B system, refer to HHT
Radio:
D2B initialization fault
  Reconfigure the D2B system, refer to HHT
Radio:
D2B components not recognized
(By-pass mode)
  Check all D2B components, replace if necessary

Radio:
EEPROM defect
  Replace radio

 


Radio:
RAM defect
  Replace radio

Radio:
One or more buttons stuck
  Press and test all buttons several times

Radio:
Low voltage
  23 3.0

Radio:
Interal fault
  Replace radio

Radio:
D2B Wake-up circuit - +
  Check circuit

Radio:
CAN bus faulty
  Check CAN data bus

Radio:
Nominal - actual values of the D2B- rings different
  Reconfigure the entire D2B system, refer to HHT

Radio:
Scan function faulty (antenna connection)
  Check antenna system (ATS)



Radio:
Cassette player or cassette faulty
  Check cassette
Replace radio
1) Observe Preparation for Test, see 22 .