Check, adjust idle speed, emission level/lambda control (KE)

AP07.32-P-0750B

Check, adjust idle speed, emission level/lambda control (KE)

20.11.2019

Engine

102.964 in model 460

Engine

102.965 in model 463.200/220/221

Engine

102.979 in model 461.227/229/238/239/249/266/267

Engine

102.987 in model 460

Engine

102.989 in model 463.204/224/225

Engine

103.987 in model 463.207/227/228

Engine

117.965 in model 463.228

Connection scheme for measuring equipment:

012

Lambda control tester

026

Digital test equipment

031

Twin socket

061

Trigger clamp

062

Kilovolt clamp

S5/5

Left high-voltage distributor

S5/6

Right high-voltage distributor

T1/1

Ignition coil 1

T1/2

Ignition coil 2

2

Hexagon socket head screw

Shown on engine 102

1

Roller

2

Fulcrum lever

Shown on engine 103

1

Roller

2

Fulcrum lever

Shown on engine 117

11

Closed throttle stop

22

Link rod

23

Relay lever

1

3 mm hexagon screwdriver

2

Guide tube

3

Adjusting device

4

Locking plug

61

Adjustment screw



Check

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

1

Connect test equipment

 Ignition:OFF
- Oil remote thermometer
- Digital test equipment (026)
- Trigger clamp (061) at cylinder 1
- Kilovolt clamp (062) at ignition coil  T1/1
- Lambda control tester (012)
- Twin socket (031)
- CO tester

 Commercially available devices/tools
Engine tester
CO tester
Lambda control tester
Twin socket

2

Check throttle control

 Engine 102/103
The roller (1) must lie against the closed throttle stop in the slotted lever (2) free of tension.
If there are problems (subject to separate repair order)
Adjust throttle control linkage (arrow).

 Engine 117
When pushed in the direction of the arrow, the relay lever (23) must be felt to touch the idle stop of the automatic transmission.
If there are problems (subject to separate repair order): Adjust throttle control linkage (arrow).

3.1

Check ignition angle

Engines with transistorized ignition control

 With manual transmission:
Shift lever position: Neutral

With automatic transmission:
Selector lever position: P
Refrigerant compressor: OFF

Engine 102.964/987Ignition timing without vacuum

*BE15.11-P-1001-01A

In case of deviation from specified values:



Adjust ignition angle

 Adjust ignition angle at specified rpm without vacuum. After tightening the ignition distributor, check the firing point again.

3.2

Check ignition angle

Engines with DI and DI/AKC systems

 With manual transmission:
Shift lever position: Neutral

With automatic transmission:
Selector lever position: P
Refrigerant compressor: OFF

 Engine 103
Set digital tester to cylinder selection 6

 Engine 102/117
Set digital tester to cylinder selection 4

If there are deviations from specified values (subject to separate repair order): Perform test program (see Diagnosis Manual Engine, Volume 2)

4

Check idle speed

 With manual transmission:
Shift lever position: Neutral

With automatic transmission:
Selector lever position: P
Refrigerant compressor: OFF

ENGINE 102Idling speed

*BE07.32-P-1001-01B

Engine 117Idling speed

*BE07.32-P-1001-01D

If there are deviations from specified values (subject to separate repair order):



Perform test program (see Diagnosis Manual Engine, Volume 2)

5.1

Check lambda control

with three way catalytic converter

 With manual transmission:
Shift lever position: Neutral

With automatic transmission:
Selector lever position: P
Refrigerant compressor: OFF

Set lambda control tester test signal selector switch to position 100%  .
On 6-and 8-cylinder engines, detach purge line from flap fitting on purge valve and seal.

ENGINE 102Lambda duty cycle

*BE07.32-P-1003-01B

Engine 103.987Lambda duty cycle

*BE07.32-P-1002-01C

Engine 117Lambda duty cycle

*BE07.32-P-1003-01D

The display value must vary during the measurement. If a constant value is displayed, there is a fault in the lambda control (subject to separate repair order):



Perform test program (see Diagnosis Manual Engine, Volume 2)

5.2

Check idle speed exhaust value

Without TWC

 With manual transmission:
Shift lever position: Neutral

With automatic transmission:
Selector lever position: P
Refrigerant compressor: OFF

ENGINE 102Idle emission value

*BE07.32-P-1002-01B

Engine 103Idle speed exhaust value

*BE07.32-P-1001-01C

Engine 117Idle emission value

*BE07.32-P-1002-01D

5.3

Adjust idle speed exhaust value or duty cycle

.

 Pull out locking plug (4), push 3 mm hexagon screwdriver (1) downward until adjusting device (3) engages in setting screw (61). Turn setting screw in required direction, release 3 mm hexagon screwdriver (1) and read off idle speed exhaust value.

Turn counterclockwise = leaner = duty cycle increases
Turn clockwise=richer =duty cycle decreases

After adjustment, a blue locking plug (4), part no. 000 589 59 86, must be installed using the push-in drift.
Reconnect the purge line (only with lambda control).

ENGINE 102Idle emission value

*BE07.32-P-1002-01B

Engine 103Idle speed exhaust value

*BE07.32-P-1001-01C

Engine 117Idle emission value

*BE07.32-P-1002-01D

ENGINE 102Lambda duty cycle

*BE07.32-P-1003-01B

Engine 103Lambda duty cycle

*BE07.32-P-1002-01C

Engine 117Lambda duty cycle

*BE07.32-P-1003-01D

 Emission probe

*126589116300

 Measuring connection

*103589009100

 Puller

*123589053300

 Drift punch

*123589001500

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.964

Engine 102.965
BACKFIT SOLUTION

BE07.32-P-1001-01B

Idling speed

1/min

75050

75050

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.965
TWC

Engine 102.979
BACKFIT SOLUTION

BE07.32-P-1001-01B

Idling speed

1/min

75050

75050

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.979
TWC

Engine 102.989
HRS.

BE07.32-P-1001-01B

Idling speed

1/min

75050

75050

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.987
BACKFIT SOLUTION

Engine 102.987
TWC

BE07.32-P-1001-01B

Idling speed

1/min

75050

75050

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.989
BACKFIT SOLUTION

Engine 102.989
TWC

BE07.32-P-1001-01B

Idling speed

1/min

75050

75050

Check values for continuous fuel injection system (electronic)

Number

Designation

ENGINE 103.987 backfit solution

ENGINE 103.987 catalytic converter

BE07.32-P-1001-01C

Idle speed exhaust value

% CO

1,00,5

0,5

Test values, continuous fuel injection system (electronic)

Number

Designation

ENGINE 117.965

BE07.32-P-1001-01D

Idling speed

1/min

600...750

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.964

Engine 102.965
BACKFIT SOLUTION

BE07.32-P-1002-01B

Idle emission value

% CO

1,00,5

1,00,5

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.965
TWC

Engine 102.979
BACKFIT SOLUTION

BE07.32-P-1002-01B

Idle emission value

% CO

0,5

1,00,5

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.979
TWC

Engine 102.989
HRS.

BE07.32-P-1002-01B

Idle emission value

% CO

0,5

1,00,5

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.987
BACKFIT SOLUTION

Engine 102.987
TWC

BE07.32-P-1002-01B

Idle emission value

% CO

1,00,5

0,5

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.989
BACKFIT SOLUTION

Engine 102.989
TWC

BE07.32-P-1002-01B

Idle emission value

% CO

1,00,5

0,5

Check values for continuous fuel injection system (electronic)

Number

Designation

ENGINE 103.987 backfit solution

ENGINE 103.987 catalytic converter

BE07.32-P-1002-01C

Lambda duty cycle

%

–

5010

Test values, continuous fuel injection system (electronic)

Number

Designation

ENGINE 117.965

BE07.32-P-1002-01D

Idle emission value

% CO

0,5

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.964

Engine 102.965
BACKFIT SOLUTION

BE07.32-P-1003-01B

Lambda duty cycle

%

–

–

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.965
TWC

Engine 102.979
BACKFIT SOLUTION

BE07.32-P-1003-01B

Lambda duty cycle

%

5010

–

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.979
TWC

Engine 102.989
HRS.

BE07.32-P-1003-01B

Lambda duty cycle

%

5010

–

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.987
BACKFIT SOLUTION

Engine 102.987
TWC

BE07.32-P-1003-01B

Lambda duty cycle

%

–

5010

Test values, continuous fuel injection system (electronic)

Number

Designation

Engine 102.989
BACKFIT SOLUTION

Engine 102.989
TWC

BE07.32-P-1003-01B

Lambda duty cycle

%

–

5010

Test values, continuous fuel injection system (electronic)

Number

Designation

ENGINE 117.965

BE07.32-P-1003-01D

Lambda duty cycle

%

5010

Test values, ignition angle

Number

Designation

Engine 102.964

Engine 102.987

BE15.11-P-1001-01A

Ignition timing without vacuum

Premium leaded

°CKA before TDC

321

301

Premium unleaded

°CKA before TDC

271

251

at engine speed

1/min

4500

4500