Electronic Throttle Module - Uneven Idle

S70/V70 1999-2000/C70 1999-
S80 1999-/V70/S60 2001-

Section
2

Group
25

No.
0023

Year
01

Month
07

Reference:
Vehicles involved: All equipped with Electronic Throttle Module

Electronic Throttle Module (ETM), Cleaning

Background:

Carbon deposits can form in the throttle module bore on cars frequently driven short distances. This residue can cause idle speed to become uneven and noticeable to the driver especially with the increased load produced by the air conditioning compressor cycling on and off. This Service Bulletin describes how to clean the throttle module bore.

Materials:

Description Quantity Part no.

Cleaner H 1 1161436

Electronic Throttle Module (ETM), Cleaning

1

Preparations

Removing and installing the throttle unit see VADIS:

Replacement and installation

Function group 25

"Replace the throttle unit".

2

Cleaning the ETM

Warning!
Use a fume hood or ensure that ventilation is good. DO NOT submerge throttle unit in cleaning solvent. ONLY use cleaning solvent recommended in this bulletin.

Caution!
Do not scrape or use a rotary wire brush to clean the unit.

Clean the ETM bore using cleaner H (P/N 1161436-9) and a soft bristle brush.





Ensure that all the residue is removed from the shaded surfaces shown in the illustration.

3





Carefully wipe the bore clean on both sides of the throttle plate.

4





Flush the ETM bore using cleaner H on both sides of the throttle plate.

Check that there is no residue in the bore or on the throttle plate. Any remaining residue can promote new residue build up.

Repeat the procedure if necessary.

Install the throttle body (TB) see VADIS:

Replacement and installation

Function group 25

"Replace the throttle unit".





WARRANTY STATEMENT: Claims may be submitted under New Car Warranty ONLY one time per vehicle when there is a documented customer complaint, using claim type 01.