Volvo C30 2007 Service And Repair Manual page 309

CAN NETWORK
FAULT TRACING ON CAN NETWORK
SIGNAL MISSING
GENERAL INFORMATION
NOTE: Illustrations shown are only examples.
HINT: For general information about CAN-troubleshooting:
see GENERAL INFORMATION ABOUT FAULT-TRACING IN THE CAN NETWORK

General about CAN-related diagnostic trouble codes.
CEM-DF01 - DF17 can only be stored in Central electronic module (CEM). These diagnostic trouble
codes are stored when an electric fault is detected in CAN-lines. Start with these diagnostic trouble codes
first.
CEM-DEXX is only stored in Central electronic module (CEM). One diagnostic trouble code for every
control module on the CAN-net. These diagnostic trouble codes indicate that Central electronic module
(CEM) does not receive any reply from other control modules.
XXX-E000 (HS-CAN)/E001 (LS-CAN) can be stored in all CAN-connected control modules. These
diagnostic trouble codes indicate that the control module has detected interference on the CAN-net.
XXX-E003 can be stored in all CAN-connected control modules except in Central electronic module
(CEM). The control modules on the CAN-net listen for a message (identity number) that is sent out at
regular intervals from Central electronic module (CEM). This diagnostic trouble code indicates that the
control module has not received any identity number, or that the expected number is not correct.
Interference on the CAN-net can also store this diagnostic trouble code.
NOTE: In case of CAN-related faults, it is likely that a combination of above
diagnostic trouble codes occur.
NOTE: After fault with control modules that interfere with communication, other
control modules may remain in Limp-Home (that is, they work with
reduced functionality) even when the ignition has been turned off and on a
few times. For certain faults in the CAN-net where control modules have
stopped communicating, it may help to disconnect/reconnect the battery
to "restart" the control module/CAN-net.
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