Diagnostic Trouble Code (DTC) Information CRM-2021

Condition 

The fault code will be set if one of the signal leads between the position sensor and the convertible roof module (CRM) is short circuited to voltage.

The diagnostic trouble code (DTC) can be diagnosed in ignition positions 0, I, II and III.

Fig 1: Identifying Convertible Roof Position Sensor

Courtesy of VOLVO CARS CORPORATION

Substitute Value 

• None.

Possible Source 

• Short-circuit to battery voltage in the signal cable.
• Position sensor not working.
• Incorrect installation of position sensor.
• Internal error in Convertible Roof Module (CRM).

Fault symptom[s] 

• None or limited roof maneuvering