VOLVO
IEM-B201587 - Pulse Width Modulation. Bus Signal / Message Failures. Missing message
System
Unknown System / Manufacturer Specific
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
Although the code is named pulse width modulation, it applies when the PWM signal from the electric rear axle drive control module (IEM) is missing. The fault is set while driving in gear D or R. The causes are a software fault in the IEM or an internal fault in the voltage converter (ISC). Electric propulsion is then not possible.
Possible causes
- Software fault in the electric rear axle drive control module (IEM)
- Internal fault in the voltage converter (ISC)
What you can do
- 1Have a workshop download new software to the IEM and check that the download completes. High voltage systems may only be handled by qualified personnel
- 2Have a workshop check the voltage converter (ISC) if the fault remains after the software download
- 3Do not carry out any work on the high voltage system yourself
- 4After the repair, check that the code is not stored again while driving in gear D or R
Symptoms you may notice4
- Text window and warning symbol with a text message
- Drive mode PURE disengages automatically or is unavailable
- Drive mode AWD disengages automatically or is unavailable
- Drive mode HYBRID: the combustion engine runs all the time or too often
What the fault can affect2
- Electric propulsion is not possible
- Brake energy regeneration from the electric rear axle is not possible
General guidance for car owners. Diagnosis on the car can point to a different cause.