Diagnostic Trouble Code (DTC) Information CRM-E001

Condition

The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network).

The diagnostic trouble code (DTC) is stored if the control module registers serious interference on the low speed network (CAN communication blocked).

NOTE:

In the event of system communication problems, it is not possible to communicate with the control module.

Therefore it will only be possible to read off the fault if it is intermittent.

Fig 1: Identifying Convertible Roof Module (CRM)

Courtesy of VOLVO CARS CORPORATION

Substitute Value

Control module shuts itself off ("bus-off").

HINT: Control module will remain shut off until the power supply is broken (15, 30, X).

HINT:

Possible Source

Short-circuit between the control area network (CAN) wiring.
Open-circuit in the control area network (CAN) wiring.
Internal fault in the control module.
Internal fault in another control module in the same part of the control area network (CAN).

Fault symptom[s]

Push button does not work
Lockable storage doesn't work
Antenna extension or retraction not working