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Home >> Volvo >> 2004 >> XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> ICM Codes (Infotainment Control Module) >> ICM-DC02 >> No Communication >> Part 2

Part 2






No communication (Continued)

Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Disconnect the MOST connector from the audio module (AUD)
3. Connect the MOST cable to special tool 951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on
5. Activate the infotainment system
6. Check that the communication on the MOST network is functioning by reading off the status of the MOST locked parameter for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible
7. If the parameter displays that the MOST network is not correctly connected, check the receiving control module in the same way as above.
The communication on the MOST network is working if the menu text is displayed. If this is the case, the fault cause is in the audio module (AUD). Continue the fault-tracing by checking the component.
The communication on the MOST network is not working if the menu text is not displayed. The fault cause is then in the MOST cable for the next control module. Continue the fault-tracing by checking the fiber optic cable.

Checking cable
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MOST cable if no fault is found in the MOST terminal.

Checking the component
- Check the power supply and the ground terminal for the audio module (AUD)
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the audio module (AUD) if no fault is found.
Click the VCT2000 symbol to read off the status of the MOST network.
Remedy as necessary.

Other information:
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- For information about checking the power supply and ground terminal, see Checking the voltage / ground terminal Checking the Voltage/Ground Terminal, Audio Module (AUD)
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.





Select "Continue".

Continue - Verification

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Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Disconnect the MOST connector from the CD player module (MP2)
3. Connect the MOST cable to special tool 951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on
5. Activate the infotainment system
6. Check that the communication on the MOST network is functioning by reading off the status of the MOST locked parameter for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible
7. If the parameter displays that the MOST network is not correctly connected, check the receiving control module in the same way as above.
The communication on the MOST network is working if the menu text is displayed. The fault cause is then in the CD module (MP2). Continue the fault-tracing by checking the component.
The communication on the MOST network is not working if the menu text is not displayed. The fault cause is then in the MOST cable for the next control module. Continue the fault-tracing by checking the fiber optic cable.

Checking cable
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MOST cable if no fault is found in the MOST terminal.

Checking the component
- Check the power supply and the ground terminal for the CD player module (MP2)
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the CD player module (MP2) if no fault is found.
Click the VCT2000 symbol to read off the status of the MOST network.
Remedy as necessary.

Other information:
- To access or replace the CD module (MP2), see MiniDisc / CD control module, replacing Service and Repair
- For information about checking the power supply and ground terminal, see Checking the power supply and ground terminals Checking the Voltage/Ground Terminal, MD/CD Module (MP1/MP2)
- For information about signals, see Signal specification Signal Description, MD/CD Module (MP1/MP2)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.





Select "Continue".

Continue - Verification

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Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Disconnect the MOST connector from the phone module (PHM)
3. Connect the MOST cable to special tool 951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on
5. Activate the infotainment system
6. Check that the communication on the MOST network is functioning by reading off the status of the MOST locked parameter for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible
7. If the parameter displays that the MOST network is not correctly connected, check the receiving control module in the same way as above.
The communication on the MOST network is working if the menu text is displayed. If this is the case, the fault cause is in the phone module (PHM). Continue the fault-tracing by checking the component.
The communication on the MOST network is not working if the menu text is not displayed. The fault cause is then in the MOST cable for the next control module. Continue the fault-tracing by checking the fiber optic cable.

Checking cable
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MOST cable if no fault is found in the MOST terminal.

Checking the component
- Check the power supply and the ground terminal for the phone module (PHM)
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the phone module (PHM) if no fault is found.
Click the VCT2000 symbol to read off the status of the MOST network.
Remedy as necessary.

Other information:
- Phone module (PHM), replacing Phone Module (PHM), Replacing
- Checking the voltage / ground terminal Checking the Voltage/Ground Terminal, Phone Module (PHM)
- Signal specification Signal Specification, Phone Module (PHM)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.





Select "Continue".

Continue - Verification

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Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Disconnect the MOST connector from the MD player module (MP1)
3. Connect the MOST cable to special tool 951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on
5. Activate the infotainment system
6. Check that the communication on the MOST network is functioning by reading off the status of the MOST locked parameter for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible
7. If the parameter displays that the MOST network is not correctly connected, check the receiving control module in the same way as above.
The communication on the MOST network is working if the menu text is displayed. The fault cause is then in the MD player module (MP1). Continue the fault-tracing by checking the component.
The communication on the MOST network is not working if the menu text is not displayed. The fault cause is then in the MOST cable for the next control module. Continue the fault-tracing by checking the fiber optic cable.

Checking cable
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MOST cable if no fault is found in the MOST terminal.

Checking the component
- Check the power supply and the ground terminal for the MD player module (MP1)
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MD player module (MP1) if no fault is found.
Click the VCT2000 symbol to read off the status of the MOST network.
Remedy as necessary.

Other information:
- To access / replace the MD module (MP1), see MiniDisc / CD control module, replacing Service and Repair
- For information about checking the power supply and ground terminal, see Checking the power supply and ground terminals Checking the Voltage/Ground Terminal, MD/CD Module (MP1/MP2)
- For information about signals, see Signal specification Signal Description, MD/CD Module (MP1/MP2)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.





Select "Continue".

Continue - Verification

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Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Disconnect the MOST connector from the multimedia module (MMM)
3. Connect the MOST cable to special tool 951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on
5. Activate the infotainment system
6. Check that the communication on the MOST network is functioning by reading off the status of the MOST locked parameter for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible
7. If the parameter displays that the MOST network is not correctly connected, check the receiving control module in the same way as above.
The communication on the MOST network is working if the menu text is displayed. If this is the case, the fault cause is in the multimedia module (MMM). Continue the fault-tracing by checking the component.
The communication on the MOST network is not working if the menu text is not displayed. The fault cause is then in the MOST cable for the next control module. Continue the fault-tracing by checking the fiber optic cable.

Checking cable
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the MOST cable if no fault is found in the MOST terminal.

Checking the component
- Check the power supply and the ground terminal for the multimedia module (MMM)
- Check the MOST connection. Check for dirt, loose connections and damage
- Replace the multimedia module (MMM) if no fault is found.
Click the VCT2000 symbol to read off the status of the MOST network.
Remedy as necessary.

Other information:
- To access / replace the multimedia module (MMM), see Multimedia module (MMM), replacing Multimedia Module (MMM), Replacing
- For information about checking the power supply and ground terminal, see Checking the voltage / ground terminal Checking the Supply/Ground Terminal, Multimedia Module (MMM)
- For information about signals, see Signal specification Signal Description, Multimedia Module (MMM)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.





Select "Continue".

Continue - Verification

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Checking cable and component




- Ignition off
- Disconnect the MOST cable connector from the infotainment control module (ICM)
- Ignition on
- Activate the infotainment system.
Check visually whether the infotainment control module (ICM) is emitting light from the MOST connector.
The control module is defective if the infotainment control module (ICM) is not emitting light.
If the infotainment control module (ICM) is transmitting light, the fault is in the MOST cable for the next control module.
Check the MOST connection. Check for dirt, loose connections and damage.
Replace the MOST cable if no fault is found in the MOST terminal.
Remedy as necessary.

Other information:
- To access / replace the infotainment control module (ICM), see Infotainment control module (ICM), replacing Infotainment Control Module (ICM), Replacing
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- For information about location and order of control modules in the MOST network, see Location of components Locations.

Select "Continue".

Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the infotainment system and select the radio.
Check whether there is sound from the radio in the loudspeakers.

Is the sound of the radio coming through the loudspeakers?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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Fault-tracing 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 - Checking the wiring and component

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