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Diagnostic Manual, Engines, Volume 1

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LOCATION:    A ME-SFI Test and Adjustment Data    >   61 Refer to Parts Microfiche Gr. 54 to identify control modules


Refer to Parts Microfiche Gr. 54 to identify control modules

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Closed throttle (idle) position, check, adjust (07-2053 or 07-2056) 15)
Engine oil temperature ° C
Selector lever position
Engine speed rpm
CTP recognition (accelerator pedal not depressed) HHT display
On-off ratio before right TWC %
On-off ratio before left TWC %
Engine coolant temperature ° C approx.

>60
P/N
P/N: 600 - 750 D: <650
ON
0±25 1)
0±25 1)
>80
1) In case of complaint, on-off ratio must be measured at idle speed and at 2500 rpm with purge line to engine disconnected and plugged.
15) Time Guide operation no. and/or SMS job no.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Engine, check, adjust ( 07-1100) 15) Page 1
Engine oil level HHT display
Fuel tank level HHT display
Engine oil temperature ° C
Engine speed (selector lever in P/N position) rpm
Air mass kg/h
MAF voltage (increasing rpm = increasing voltage V
Ignition timing with premium unleaded gasoline (91 posted/95 RON) 1) o CKA
Injection duration right ms
Injection duration left ms
Adjustable camshaft timing solenoid HHT display
Camshaft Hall-effect sensor, value jumps HHT display
ECT ° C
Intake air temperature (IAT) ° C
Purge valve on-off ratio %
Battery voltage V
Actuator Actual value potentiometer r1 V
Actual value potentiometer r2 V
Pedal value sensor Nominal value potentiometer r1 V
Nominal value potentiometer r2 V
CTP recognition (accelerator pedal not depressed) HHT display
WOT recognition HHT display

OK
OK
>60
600 - 750
12 - 18
0.6 - 0.9
5 - 20
3 - 5
3 - 5
OFF
55-AA
>80
>20
10 ± 5
10
4.0 - 4.6
0.3 - 0.9
0.2 - 0.5
0.1 - 0.4
ON
OFF
1) In case of complaint, check ignition timing at full load.
15) Time Guide operation no. and/or SMS job no.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Engine, check, adjust 07-1100 Page 2
Torque Nm
Throttle vale angle °
Throttle valve stop learned HHT display
On-off ratio before right or left TWC
ECT >70°C %
Right O2S 1 voltage before TWC mV
Left O2S 1 voltage before TWC mV
Self adaptation at partial load, right Factor
Self adaptation at partial load, left Factor
Self adaptation at idle speed, right ms
Self adaptation at idle speed, left ms
Driving range (selector lever position) HHT display
A/C compressor, EC pushbutton depressed HHT display
Purge system HHT display
Safety fuel shut off HHT display

-
0.3 - 2
YES

0 ± 25 2) oscillates
- 200 to + 1000 12)
- 200 to + 1000 12)
0.77 - 1.28 5)
0.77 - 1.28 5)
- 1 to + 1 4)
- 1 to + 1 4)
P/N
OFF
OFF/ON
OFF
2) In case of complaint, on-off ratio must be measured at idle speed and at 2500 rpm with purge line to engine disconnected and plugged.
4) Base setting at idle, 0.0 kg/h (Bosch) or 0.0% (VDO). Mixture tendency " rich " < 0.0 kg/h or 0.0%. Mixture tendency " lean " > 0.0 kg/h or 0.0%.
5) Base setting partial load = 1.0. Mixture tendency " rich " < 1.0, mixture tendency " lean " = > 1.0.
12) Oscillates around 300 mV after 2 minutes at idle.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Cold start 07-2321
Engine rpm while cranking rpm
Battery voltage V
Safety fuel shut off HHT display
Engine oil level HHT display
Fuel tank level HHT display
ECT ° C
IAT ° C
ECT at starting ° C
CTP recognition (accelerator pedal not depressed) HHT display

> 200
10
OFF
OK
OK
7)
7)
7)

ON
7) Proceed complaint related or temperature related.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Warmup 07-2023
Warmup speed 12) ECT < 40 °C rpm
Warmup speed 12) ECT > 40 °C rpm
Engine rpm (raised idle speed temperature dependent)
ECT approx. -10 °C rpm
ECT approx. +15 °C rpm
ECT approx. > 50 °C rpm
CTP recognition (accelerator pedal not depressed) HHT display
After start enrichment < 70 °C maximum 50 seconds HHT display
TWC heating at idle < 30 °C maximum 25 seconds HHT display
O2S 1 heater before TWC V
A/C compressor HHT display

approx. 1000 - 1300
approx. 800

P/N: 800 ± 50 D: 700 ± 50
P/N: 700 ± 50 D: 650 ± 50
P/N: 600 - 750 D: < 650
ON
ON
ON
-
OFF
12) Raised idle speed for max. approx. 50 seconds after starting.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Engine performance 7) 07-1203 or 1206 Page 1
Engine oil level HHT display
Fuel tank level HHT display
Engine speed rpm
Air mass kg/h
MAF sensor voltage V
Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA
Injection duration, right ms
Injection duration, left ms
Camshaft timing adjustment 4000 rpm HHT display
Camshaft timing adjustment > 4300 rpm HHT display
Camshaft Hall-effect sensor,.value jumps HHT display
ECT °C
IAT °C
Purge valve on-off ratio %
Battery voltage V
Driving range 3 hp
Altitude (correction value) Factor
Exhaust gas back pressure mbar

OK
OK
4000
360 - 460
-
18 - 22
11 - 14
11 - 14
ON
OFF
55 - AA
80 - 100
< 30
-
10
237
-
< 200
7) These are minimum performance values. Do not exceed speed of 80 mph.
Simulating engine coolant temperature and intake air temperature is not possible with ME-SFI. When testing WOT position be sure to use an external cooling fan to ensure adequate engine cooling.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Engine performance 7) 07-1203 or 1206 Page 2
Actuator Actual value potentiometer r1 V
Actual value potentiometer r2 V
Pedal value sensor Nominal value potentiometer r1 V
Nominal value potentiometer r2 V
Throttle valve angle °
CTP recognition HHT display
WOT recognition HHT display
Torque Nm
Knock control approved HHT display
Knock ignition angle/cylinder oCKA
Right knock sensor V
Left knock sensor V
Driving range (selector lever position) HHT display
A/C compressor HHT display
Transmission overload protection HHT display
Deceleration shut-off HHT display
Front axle VSS mph (km/h)
Rear axle VSS mph (km/h)

-
-
-
-
-
OFF
ON
-
OFF/ON 14)
0
> 0.5
> 0.5
R, D - 1
OFF
OFF
OFF
-
> 62 (100)
7) These are minimum performance values. Do not exceed speed of 80 mph.
Simulating engine coolant temperature and intake air temperature is not possible with ME-SFI. When testing WOT position be sure to use an external cooling fan to ensure adequate engine cooling.
14) HHT display ON if knock control is required.

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Cruise control
Brake switch, brake pedal not depressed HHT display
Stop lamp switch, brake pedal not depressed HHT display
Move CC switch to corresponding position HHT display
Safety contact, CC switch actuated HHT display
Safety contact, CC switch not actuated HHT display
Cruise control HHT display
Maintain transmission range HHT display
Cruise control shut-off, function HHT display
Cruise control shut-off, safety HHT display

OFF
OFF
V/SP/B/A
ON
OFF
-
-
-
-
Drive authorization system (DAS)
DAS and ME-SFI control modules compatible HHT display
Engine control module identified HHT display
Engine control module locked HHT display
Drive authorization activated HHT display
Vehicle locked with RCL HHT display
Number of starts with not locked control module Number

YES
YES
YES
YES
NO
0

Engine 120.982/983
Models 140.057/076, 129.076
ME-SFI system designation 1.0
Idle Quality
Rpm deviation/cylinder revolution/s2
Rpm deviation cut out threshold revolution/s2
Acceleration sensor up to 01/96 V
Idle quality failure counter as of 02/96 Number

1)
0.5 2)
2.35 - 2.65
0
On-off ratio
Idle speed rpm
Engine speed rpm
On-off ratio at WOT and transmission selector lever position 3 %
On-off ratio at upper partial load and transmission selector lever position "D",
75 mph (120 km/h), 32 hp (24 kW) %
On-off ratio at lower partial load and transmission selector lever position "D",
31 mph (50 km/h), 9 hp (7 kW), %
Exhaust gas back pressure mbar

600 - 750
2500
0±25 constant

0±25 oscillating

0±25 oscillating
<200
1) Entry if value is larger than cut out threshold.
2) Temporary test value.