I just recently purchased a 2013 Volvo S60 and the Infotainment system does not work. All the buttons are non responsive but the AC buttons work. I am able to use the controls on the steering wheel to move the display screen but no sound. I took it for a diagnostic which costed me $80 and it came back with codes ICM-u1a2400 and ICM-u1a1587.
Please what should i do? Where should i start to trouble shoot. I would greatly appreciate any help i can get.
2013 Volvo S60 infotainment center not responding
-
RickHaleParker
- Posts: 7129
- Joined: 25 May 2015
- Year and Model: See Signature below.
- Location: Kansas
- Has thanked: 8 times
- Been thanked: 958 times
MOST (Media Oriented System Transport) network ( Fiber optic network .. The orange cables with a glass center).
This is a ring network. In Vida it is displayed as a ring in the network.
-----------------------------------------------------------------------------------------------------------------------------
ICM-U1A2400 MOST Ring Complete. No Communication. General Failure Information. No sub type information
Diagnostic trouble code (DTC) information ICM-U1A2400
The infotainment control module (ICM) checks that the status of the MOST network is MOST-LOCK.
MOST-LOCK means that the network is closed and that communication is possible.
The diagnostic trouble code (DTC) is stored if the control module detects that:
The MOST network is not connected.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
Control module on for longer than 5 seconds.
Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Substitute value
None.
Possible source
Audio system does not function
Navigation; No Functionality
Infotainment functions do not work
Missing or reduced functionality in the phone
---------------------------------------------------------------------------------------
ICM-U1A2400 Faulty communication in MOST network.
General
The MOST network is monitored by the infotainment control module (ICM). If it detects a fault in the MOST network, a diagnostic trouble code (DTC) is stored in the infotainment control module (ICM). There are different types of diagnostic trouble codes (DTCs) depending on the type of fault. A general rule is that if the light pulse in the MOST network disappears, the entire network stops working.
Fault types which are processed are:
Missing communication may be due to an internal fault in the control module or because the function is incorrectly implemented in the control module.
Faulty communication
For faults when messages cannot be sent on the MOST network, diagnostic trouble code (DTC) ICM-U1A2400 is stored.
Causes of this fault may be that:
Ring break diagnostics are used to remedy diagnostic trouble code (DTC) ICM-U1A2400. If a break is discovered in the MOST network after running a ring break diagnostic, diagnostic trouble code (DTC) ICM-U1A1587 will be stored in the infotainment control module (ICM). If this is the case, which control module the open-circuit is located in can be read off from the infotainment control module (ICM).
Ring break diagnostics
General
This function is important when fault-tracing the MOST network. Ring break diagnostics are used when there is an open-circuit in the MOST network and diagnostic trouble code (DTC) ICM-U1A2400 has been stored in the infotainment control module (ICM).
Ring break diagnosis means that all control modules send a message to Infotainment Control Module (ICM) in reverse order to how they are located in the MOST-net. This means that Accessory USB unit (AUU) sends first and not last (applies to S80/V70/XC70, for XC60 Remote digital audio receiver (RDAR)/Digital Audio Broadcast Module (DABM).
The control module which is not working will not transmit a response to the infotainment control module (ICM). This also means that the control modules which are connected before the defective control module will be unable to transmit a message to the infotainment control module (ICM).
The same applies to open-circuits in the optical cable in the MOST network. No control module before the open-circuit will transmit a message to the infotainment control module (ICM). By using the incoming messages the infotainment control module (ICM) can present at which control module the open-circuit has occurred.
Hint:
It is important to know which control modules are connected and in which order they are connected in order to know which control modules lie before and after the indicated control module.
Example for S80/V70/XC70
A MOST-network contains all 8 control modules. There is an open circuit in the cable between the Phone Module (PHM) and the audio module (AUD), see the illustration.
In a ring break diagnostic the infotainment control module (ICM) receives replies from the control modules on the MOST network. Those located before the Audio module (AUD), i.e., the Phone Module (PHM), cannot transmit their reply to the infotainment control module (ICM).
The infotainment control module (ICM) now receives a response from all control modules except the integrated Phone Module (PHM), and therefore presents the control module which is first in the loop and which responded, in this case the Audio module (AUD).
If there was no open circuit, the infotainment control module (ICM) would have responded ”OK”.
This is a ring network. In Vida it is displayed as a ring in the network.
-----------------------------------------------------------------------------------------------------------------------------
ICM-U1A2400 MOST Ring Complete. No Communication. General Failure Information. No sub type information
Diagnostic trouble code (DTC) information ICM-U1A2400
The infotainment control module (ICM) checks that the status of the MOST network is MOST-LOCK.
MOST-LOCK means that the network is closed and that communication is possible.
The diagnostic trouble code (DTC) is stored if the control module detects that:
The MOST network is not connected.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
Control module on for longer than 5 seconds.
Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Substitute value
None.
Possible source
- Dirty or damaged terminal for the MOST cable.
Open-circuit in the MOST cable.
MOST transceiver is damaged in one of the control modules in the MOST network.
No power supply to a control module in the MOST network.
Damaged fuse.
Damaged control module in the MOST network.
Audio system does not function
Navigation; No Functionality
Infotainment functions do not work
Missing or reduced functionality in the phone
---------------------------------------------------------------------------------------
ICM-U1A2400 Faulty communication in MOST network.
General
- No communication from a control module
Ring break diagnostics
Fault management on the MOST network
The MOST network is monitored by the infotainment control module (ICM). If it detects a fault in the MOST network, a diagnostic trouble code (DTC) is stored in the infotainment control module (ICM). There are different types of diagnostic trouble codes (DTCs) depending on the type of fault. A general rule is that if the light pulse in the MOST network disappears, the entire network stops working.
Fault types which are processed are:
- No communication from a control module
Faulty communication on the MOST network.
No communication from a control module
Missing communication may be due to an internal fault in the control module or because the function is incorrectly implemented in the control module.
Faulty communication
For faults when messages cannot be sent on the MOST network, diagnostic trouble code (DTC) ICM-U1A2400 is stored.
Causes of this fault may be that:
- A control module, except the infotainment control module (ICM), has a defective optical connector
A control module has an internal fault which means that the optical connection stops working
A control module on the MOST network is not powered. If there is no power supply, the optical connecter stops transmitting light
The optical cable is damaged or there is an open-circuit.
( Open-circuit can be caused by the bend radius of the cable is too small, kinks or trapped. )
There is dirt or oil on the optical connectors which impedes the light
The connection to a control module has come loose
The fiber optic terminals in the connector are cross-connected
There is a loose connection because the fiber optical wiring is incorrectly installed or the fiber optic terminal pin id pushed back in the Connector
A bridging connector has come loose or is damaged.
Ring break diagnostics are used to remedy diagnostic trouble code (DTC) ICM-U1A2400. If a break is discovered in the MOST network after running a ring break diagnostic, diagnostic trouble code (DTC) ICM-U1A1587 will be stored in the infotainment control module (ICM). If this is the case, which control module the open-circuit is located in can be read off from the infotainment control module (ICM).
Ring break diagnostics
General
This function is important when fault-tracing the MOST network. Ring break diagnostics are used when there is an open-circuit in the MOST network and diagnostic trouble code (DTC) ICM-U1A2400 has been stored in the infotainment control module (ICM).
Ring break diagnosis means that all control modules send a message to Infotainment Control Module (ICM) in reverse order to how they are located in the MOST-net. This means that Accessory USB unit (AUU) sends first and not last (applies to S80/V70/XC70, for XC60 Remote digital audio receiver (RDAR)/Digital Audio Broadcast Module (DABM).
The control module which is not working will not transmit a response to the infotainment control module (ICM). This also means that the control modules which are connected before the defective control module will be unable to transmit a message to the infotainment control module (ICM).
The same applies to open-circuits in the optical cable in the MOST network. No control module before the open-circuit will transmit a message to the infotainment control module (ICM). By using the incoming messages the infotainment control module (ICM) can present at which control module the open-circuit has occurred.
Hint:
It is important to know which control modules are connected and in which order they are connected in order to know which control modules lie before and after the indicated control module.
Example for S80/V70/XC70
A MOST-network contains all 8 control modules. There is an open circuit in the cable between the Phone Module (PHM) and the audio module (AUD), see the illustration.
In a ring break diagnostic the infotainment control module (ICM) receives replies from the control modules on the MOST network. Those located before the Audio module (AUD), i.e., the Phone Module (PHM), cannot transmit their reply to the infotainment control module (ICM).
The infotainment control module (ICM) now receives a response from all control modules except the integrated Phone Module (PHM), and therefore presents the control module which is first in the loop and which responded, in this case the Audio module (AUD).
If there was no open circuit, the infotainment control module (ICM) would have responded ”OK”.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
Thanks Rick for the information. Why suggestions as to what steps I should take in order to begin troubleshooting. I don't know much about this, just trying to use my DIY skills to see if I can fix the issues with some guidance.
-
- Similar Topics
- Replies
- Views
- Last post