Fault-Tracing Information
Fault-tracing
Information
Note! If Infotainment control module (ICM) has detected the diagnostic trouble code ICM-U1A2400, begin by troubleshooting it. Malfunction may be due to open circuit on the MOST-net.
If the problem remains or if Infotainment control module (ICM) has not detected the diagnostic trouble code ICM-U1A2400, continue with the following:
- Troubleshoot in the transmitting control module.
- Check that the fuses are intact.
Other information
- Checking wiring and terminals Checking Wiring And Terminals
- Connecting the breakout box Pinout Values and Diagnostic Parameters
- Signal description, infotainment control module (ICM) Signal Description, Infotainment Control Module (ICM)
- General audio player module General Audio Player Module
- Audio Module Audio Module
- Information and Entertainment Display Information And Entertainment Display
Continue - Fault-tracing information
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Fault-tracing information
Note!
The ICM checks the internal functions in Sensus when the system is started. In some cases at start-up the IAM switches to an All bypass mode which means that none of the functions in the control module work. This is because the audio control module (AUD) sends interfering signals on the MOST loop. When this occurs the AM/FM radio, CD, iPod playback functions etc cannot be started. If the vehicle is also equipped with a navigation system the image on the front screen will freeze and show "loading" if both systems are started at the same time. A DTC is then stored in the infotainment control module (ICM).
In vehicles equipped with DAB radio or Sirius radio (AME), these functions work as they are controlled by free-standing control modules. Climate related information displayed on the front screen will appear as normal.
Other information
- Checking MOST communication Checking Most Communication
Was DTC ICM-U018400 stored at the same time as MOST communication works?
Yes - Downloading software
No - Fault-tracing
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Downloading software
New software is available for the IAM. Go to the tab software and program the Integrated Audio Module (IAM) with the latest software. Restart the control module.
Note! After restart the unit resets to default settings.
Is the function OK?
Yes - FAULT FOUND
No - Fault-tracing
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Fault-tracing
Checking loudspeakers
Fault-tracing
To determine whether a loudspeaker works or not, it is appropriate to activate a test sequence that sends a tone to all loudspeaker elements.
Check the loudspeakers as follows:
Note! The test sequence consists of high tones. Therefore, do not go near the speakers during the test.
- Press the symbol for VCT2000 in order to start the test sequence.
- Listen and calculate the number of tones.
For High Performance:
8 tones in total; two per right/left front and two per right/left rear.
For Premium Sound:
14 tones in total; three per right/left front, two per right/left rear, two for the centre loudspeaker and two for the base loudspeaker.
Other information
Fault-tracing Fault-Tracing Information
Continue - FAULT FOUND
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Fault-tracing
For more information see TJ 24842 i TIE.
Is the problem solved?
Yes - FAULT FOUND
No - Information
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Information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Information
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