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Home >> Volvo >> 2007 >> XC90 AWD V8-4.4L VIN 85 B8444S >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> ICM Codes (Infotainment Control Module) >> ICM-DC01 >> 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. Unplug the MOST connector from the integrated audio module (IAM).
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 Click the VCT2000 symbol to read off the status of the MOST network.
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 integrated audio module (IAM). 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 integrated audio module (IAM) power supply and ground connection.
- Check the MOST connection. Check for dirt, loose connections and damage
- If no fault can be found, change the integrated audio module (IAM).
Remedy as necessary.

Other information:
- Control module general sound player Control Module General Sound Player
- Checking the supply voltage/ground terminal Checking the Supply Voltage/Ground Terminal, Integrated Audio Module (IAM)
- Signal specification Signal Description, Integrated Audio Module (IAM)
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









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 Click the VCT2000 symbol to read off the status of the MOST network.
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.
Remedy as necessary.

Other information:
- Phone module (PHM), replacing Phone Module (PHM), Replacing
- Checking voltage / ground connection Checking Voltage/Ground Connection
- 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
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









Continue - Verification

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Checking cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off
2. Unplug the MOST connector from the global positioning system module (GPS).
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 Click the VCT2000 symbol to read off the status of the MOST network.
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 global positioning system module (GPS). 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 global positioning system module (GPS) power supply and ground connection.
- Check the MOST connection. Check for dirt, loose connections and damage
- If no fault can be found, change the global positioning system module (GPS).
Remedy as necessary.

Other information:
- Global positioning system module (GPS) Description and Operation
- Checking the supply voltage/ground terminal Component Tests and General Diagnostics
- Signal specification Pinout Values and Diagnostic Parameters
- For information about checking and replacing the MOST cable, see Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









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 Click the VCT2000 symbol to read off the status of the MOST network.
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.
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)
- 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
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









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
- Location of components Component Location, Infotainment





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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Checking the cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off.
2. Disconnect the MOST connector from the subwoofer module (SUB).
3. Connect the MOST cable to special tool:951 2867 MOST instrumentation 951 2867 MOST Instrumentation
4. Ignition on.
5. Activate the infotainment unit.
6. Check that the communication on the MOST-net works by reading out the status for the parameter MOST locked for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible. Click on the VCT2000 symbol to obtain a MOST network status reading.
7. If the parameter shows that the MOST network is not closed, check the receiving control module in the same way as described 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 subwoofer module (SUB). 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 the 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 audio module (AUD) power supply and ground connection for the Accessory USB unit (AUU).
- Check the MOST connection. Check for dirt, loose connections and damage.
- If no fault is found, replace the Accessory USB unit (AUU).
Remedy as necessary.

Other information
- Subwoofer module (SUB), replacing Subwoofer Module (SUB), Replacing
- Checking the voltage / ground terminal Checking the Voltage/Ground Terminal, Subwoofer Module (SUB)
- Signal specification Signal Specification, Subwoofer Module (SUB)
- Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









Continue - Verification

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Checking the cable and component





Checking the fault cause
Check the fault cause as follows:
1. Ignition off.
2. Unplug the MOST-connector from Accessory USB unit (AUU).
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-net works by reading out the status for the parameter MOST locked for at least 30 seconds. The parameter indicates whether the MOST network is closed and communication possible. Click on the VCT2000 symbol to obtain a MOST network status reading.
7. If the parameter shows that the MOST network is not closed, check the receiving control module in the same way as described above.
The communication on the MOST network is working if the menu text is displayed. The cause of the fault is in the Accessory USB unit (AUU). 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 the 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 audio module (AUD) power supply and ground connection for the Accessory USB unit (AUU).
- Check the MOST connection. Check for dirt, loose connections and damage.
- If no fault is found, replace the Accessory USB unit (AUU).
Remedy as necessary.

Other information
- Universal bus module (USB), L.H.D Universal Bus Module (USB) Universal bus module (USB), R.H.D Universal Bus Module (USB)
- Checking the supply voltage/ground terminal Component Tests and General Diagnostics
- Signal specification Signal Specification, Accessory USB Unit (AUU)
- Fiber optic cable harness, repairing Fiber Optic Cable Harness, Repairing
- Optical wiring harness check Optical Wiring Harness Check
- Location of components Component Location, Infotainment









Continue - Verification

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