560SEL (126.039) V8-5.6L (117.968) (1986)
On model year 1888 vehicles, the idle speed (with transmission in gear) can be raised 50 rpm by connecting terminal "C" (terminal 5 on connector of
idle speed control unit N8) to ground using shop-made harness (figures).
This procedure can also be performed on model year 1988/1987 vehicles.
For all 1986/1987 models except 126.035 (42OSEL), the idle speed control unit (N8) must first be replaced with the model year 1988 version, as the
previous control units do not have the connection "C".
Shop-made Harness
Part Name
Part Number
Wire 0.75 sq.mm
--
Socket 4 mm dia.
003 545 26 26
Terminal cover 6 mm
900261-006000
Technical Service Bulletin # DD07.3-90101
Date: 910701
Idle Speed Exceeds 1100 RPM at Times
07.3-90101
Idle Speed Intermittently Exceeds 1100 RPM,
Engines 104;
Revised 7/91
10/90
With Engine at Operating Temperature
116, 117 as of M.Y.'86
A.
Engine 104
Cause:
1. Return spring fastened incorrectly to linkage.
2. Idle contact of throttle valve switch (S29/2) not switched.
Remedy:
1. Fasten return spring correctly to linkage.
2. Check idle contact at throttle valve switch.
B.
Engines 116, 117 as of MY. '86
Cause:
Idle contact of throttle valve switch (S29/2) not switched.
Remedy:
Check idle contact at throttle valve switch, replace throttle valve switch (S29/2) or complete throttle valve assembly if necessary.
Damage Code:
07311 73