Central Electrical Module - DTC's Set/Systems Errors
NO: 37-35DATE: 5-23-2006
MODEL: All P2X (S60 S80 V70 XC70 XC90)
YEAR: 2005-2006 (structure week 200425-200540)
CHASSIS:
XC90 FC1 134000-256551
V70 FC1 459000-555060
S60 FC2 425000-522407
S80 FC1 390000-435423
XC70 FC1 173000-220845
V70 FC2 459000-554206
(FC = Factory code) 11TH position of the VIN number
SUBJECT:
CEM harness terminal corrosion due to water entrance in plenum
(Instruction for new harness installation)
REFERENCE: VIDA repair instruction
DESCRIPTION:
Various electrical function and communication symptoms may occur in M/Y 2005-2006 vehicles caused by wet corrosion in the CEM (Central Electrical Module) connector. The grommet that seals the harness entrance to the Plenum box may not seal properly if it has been incorrectly assembled.
This may cause a number of different functionality symptoms and DTC's to be set.
Examples include but not limited to:
> Headlight on, even if ignition key is taken out of ignition lock.
> Warning messages in DIM (Driver's Information Module) display.
> Warning lamps lit up.
> Brake lights always on.
> No start condition.
PRODUCT MODIFICATION:
A new plenum sealing strategy with integrated rubber grommet was introduced in production from structure week 200540. See photo below. This new sealing strategy will be carried over to the replacement engine bay harnesses on the chassis numbers indicated, either by modification of the replacement harness (method 1), or by a superseded harness P/N with an integrated cover and grommet (method 2).
SERVICE:
If there are signs of water penetration in plenum box and/or wet corrosion at the CEM connectors, it will be necessary to install a new CEM and replace the engine bay cable harness according to one of the 2 Methods below:
METHOD 1 (modification of the original type replacement harness)
Parts required;
^ Engine bay cable harness, check VIDA parts catalogue
(This is the original type engine bay harness which will be modified with the instruction below)
Removing the existing rubber grommet
Remove the old rubber grommet using a
knife.
Caution! Make sure that no hoses or cables are damaged.
Remove and discard the holder from the new cable harness.
Remove and discard the existing surround.
Save the attachment screws to attach the new cover to the plenum floor.
Installing the new seal
Route the cable harness through the new rubber grommet and cover.
Caution! Exercise caution so that the rubber grommet is not damaged when the connectors are threaded through.
Align the arrows (1) towards each other.
Arrow (2) must point towards the handle on
the rubber grommet.
Installing the cable ties
Installing the cover
Note:
After installation, the cable harness under the cover will be slightly over length. Clamp it up in a suitable manner to prevent chaffing.
Tighten the screws to 10 Nm.
Note;
There is a risk of altering the brake light switch adjustment when working in the pedal box area. Please verify that the brake light adjustment is correct after the work is performed.
Use the method in VIDA/ Vehicle communication/ BCM/ Advanced/ checking brake light switch adjustment.
Method 2 (installation of superceded harness)
Parts required;
^ Engine bay cable harness, check VIDA parts catalogue
(This will be superseded engine bay harness with an integrated cover and grommet)
Remove and discard the existing surround.
Save the screws to attach the new cover to the
plenum floor.
Install the harness as per VIDA instruction
Install the integrated harness cover
Tighten the screws to 10 Nm.
Note; There is a risk of altering the brake light switch adjustment when working in the pedal box area. Please verify that the brake light adjustment is correct after the work is performed using the method in VIDA/ Vehicle communication/ BCM/ Advanced/ checking brake light switch adjustment
WARRANTY CLAIM INFORMATION