Audio/Computer/Controls/Fuel System - AM Radio Static

Title AM-radio static on turbo cars, caused by PEM

Ref No US6028.7.1 en-GB

Issuer -

Partner 3 US 7510 Volvo Cars North America

Func Group 3952

Func Desc antenna

Status Released

Status Date 05-17-2012

Issue Date 05-17

Reference Q2-, 050332, C-97734





Attachment





Vehicle Type





CSC Customer Symptom Codes

Text
DESCRIPTION:

Our analysis has found that the ECM can cause whining noise on the low AM-band when it communicate with
the pump electronic module (PEM), using a pulse width modulation (PWM) signal. This type of signal
normally contains a large frequency spectrum and could easily be picked up by the AM antenna. See attachment.

From M/Y 2005 the PEM was introduced on all Turbo models.

PRODUCT MODIFICATION:

From 2005 week 4 a ferrite has been added in the cable harness to PEM, this will minimize the noise on AM band.

Three different service solutions are under development for older cars.

MATERIAL RETURN:

No.

TECHNICAL REPORT:

No.

SERVICE:

* Install service kit according to Service Bulletin 39-5580.

* English bulletin included with this TJ. Other languages are available from Internet.

Service kits:

S60R, V70R (M/Y 2004), P/N 30724619.

S60, V70, S80, with steel tank sold in a few US states (M/Y 2004), P/N 30739381.

All turbo engines (M/Y 2005), P/N 30739380.

* Note: Low parts stock! Only order parts when needed.

VSTG OPERATION NUMBER:

* 39914-2 Service kit AM interference fuel pump, installation









































To view TJ attachments continue to illustrations.