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Home >> Volvo >> 2004 >> S60R AWD L5-2.5L Turbo VIN 52 B5254T4 >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> CEM Codes (Central Electronic Module) >> CEM-DF05 >> Permanent Fault >> Signal Too Low. Permanent Fault

Signal Too Low. Permanent Fault






Signal too low. Permanent fault

Checking the connectors and bus cable

Note! Remember that the CAN network is only a communication network. There are no fuses, contact breakers or sensors on the CAN bus.

Note! The battery must be disconnected to obtain the correct values when measuring the resistance between the CAN cables.

Check the bus cable. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check the intermediate connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Hint: If the fault is detected before all the following cables have been examined, select Continue.

The following cables and connectors should be examined to localize a short-circuit.

The cable between:
- Road Traffic Information (RTI) terminal #10A and rear electronic module terminal #15A.
To connect the breakout box to the RTI control module, see appropriate diagnostic procedure.
To connect the breakout box to the rear electronic module, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM)
- rear electronic module #14A and Driver Information Module #8 and intermediate connector 54/40.
To connect the breakout box to the rear electronic module, see Connecting the breakout box Connecting Breakout Box, Rear Electronic Module (REM).
To connect the breakout box to the driver information module, see Connecting the Driver Information Module (DIM) test box Connecting the Driver Information Module (DIM) Test Box
- Central electronic module (CEM) #3D and Driver Information Module (DIM) #8.
To connect the breakout box to the central electronic module (CEM), see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).
To connect the breakout box to the driver information module, see Connecting the Driver Information Module (DIM) test box Connecting the Driver Information Module (DIM) Test Box
- power seat module terminal #2B and driver information module terminal #8.
To connect the breakout box to the power seat module, see Connecting the breakout box, power seat module (PSM) Connecting the Breakout Box, Power Seat Module (PSM).
To connect the breakout box to the driver information module, see Connecting the Driver Information Module (DIM) test box Connecting the Driver Information Module (DIM) Test Box
- Driver Information Module (DIM) #2 and Climate control module (CCM) #14A.
To connect the breakout box to the driver information module, see Connecting the Driver Information Module (DIM) test box Connecting the Driver Information Module (DIM) Test Box.
To connect the breakout box to the climate control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters
- audio module #7A and Climate control module #14A.
To connect the breakout box to the audio control module, see Connecting the breakout box, Audio control module Connecting the Breakout Box.
To connect the breakout box to the climate control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters
- carphone module #22A and Climate control module #14A.
To connect the breakout box to the carphone module, see appropriate diagnostic procedure.
To connect the breakout box to the climate control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters
- passenger door module (Driver's Door Module in right hand drive) #2A and Climate control module #14A and intermediate connector 54/11.
To connect the breakout box to the passenger door module or driver's door module, see Connecting the breakout box Connecting the Breakout Box.
To connect the breakout box to the climate control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters
- Climate control module #13A and Steering wheel module #9.
To connect the breakout box to the climate control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters.
To connect the breakout box to the steering wheel module, see Connecting the breakout box Connecting the Breakout Box, Steering Wheel Module (SWM)
- Steering wheel module (SWM) #10 and SRS control module #23B.
To connect the breakout box to the steering wheel module, see Connecting the breakout box Connecting the Breakout Box, Steering Wheel Module (SWM).
To connect the breakout box to the SRS control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters
- SRS control module #24B and Upper electronic module #3 and intermediate connector 54/13.
To connect the breakout box to the SRS control module, see Connecting the breakout box Pinout Values and Diagnostic Parameters.
To connect the breakout box to the upper electronic module, see Connecting the breakout box Connecting the Breakout Box
- Driver's door module (passenger door module in right hand drive cars) terminal #2A and upper electronic module terminal #3 and intermediate connector 54/10.
To connect the breakout box to the passenger door module / driver's door module, see Connecting the breakout box Connecting the Breakout Box.
To connect the breakout box to the upper electronic module, see Connecting the breakout box Connecting the Breakout Box.

Other information
- The voltage must be between approximately 1.5V and 3.5V at the CAN wiring and ground
- The resistance must be approximately 120 ohm between the cables in the CAN
- For a wiring diagram of the bus cable and connector positions see applicable wiring diagram.
- To disconnect the battery, see Battery, disconnecting Battery Disconnecting.










Continue - Verification

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Verification




Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connectors, install components, etc.
- Ignition on for at least 10 seconds.
Check that diagnostic trouble code status is showing Intermittent.





Is the status of the diagnostic trouble code Intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Information

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the connectors and bus cable

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