Diagnostic Manual, Engines, Volume 1
Refer to Parts Microfiche Gr. 54 to identify control modules
| Engine |
104.941/942 |
104.991/992/994 |
| Models |
124.028, 202.028 |
124.032/052/066/092
129.063
140.032/033 |
| HFM-SFI system designation |
3.4 |
3.4 |
Closed throttle position (CTP), check, adjust (07-2053 or 07-205 6) 9)
Selector lever position
ECT ° C approx.
Engine speed rpm
Ignition timing with premium unleaded fuel (91 posted/95 RON) °CKA
On-off ratio %
Closed throttle contact (accelerator pedal not depressed) HHT display
|
P/N
>80
600 - 800
6 - 10 1)
0±10 2)
ON |
P/N
>80
600 - 800
6 - 10 1)
0±10 2)
ON |
1) The ignition timing is also used for idle speed stabilization. In extreme cases the timing can briefly vary by ±10° from specification.
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.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.941/942/943/944 |
104.991/992/994 |
| Models |
124.028
202.028 |
129.063
124.032/052/066/092
140.032/033 |
| HFM-SFI system designation |
3.4 |
3.4 |
Engine, check, adjust (07-1100) 9)
ECT ° C approx.
Engine speed (selector lever in P/N position) rpm
Injection duration ms
Air mass kg/h
O2S 1 voltage (oscillates around 300mV after 2 min.) mV
O2S 2 voltage (oscillates around 300mV after 2 min.) mV
On-off ratio %
Self adaptation idle air kg/h
Self adaptation idle air %
Self adaptation factor lower/upper range of part load
Ignition timing with premium unleaded fuel (91 posted/95 RON) °CKA
Throttle valve angle °
AIR pump after start, maximum of 20 seconds <40° C
Resonance flap >4000 rpm HHT display
Resonance flap idle HHT display
CTP contact (accelerator pedal not depressed) HHT display
WOT contact (accelerator pedal in WOT) HHT display
|
>80
600 - 800
2.5 - 3.8
16 - 18
-200 to +1000
-200 to +1000
0±10 2)
±2 3)
±15 3)
0.85 - 1.15 4)
6 - 10 1)
1.0 - 1.8
ON
ON
OFF
ON
ON |
>80
600 - 800
2.5 - 3.8
16 - 18
-200 to +1000
-200 to +1000
0±10 2)
±2 3)
±15 3)
0.85 - 1.15 4)
6 - 10 1)
1.0 - 1.8
ON
ON
OFF
ON
ON |
1) The ignition timing is also used for idle speed stabilization. In extreme cases the timing can briefly vary by ±10° from specification.
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.
3) Base setting 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%.
4) Base setting part load = 1.0, mixture tendency rich <1.0 mixture tendency lean > 1.0.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.941/942/943/944 |
104.991/992/994 |
| Models |
124.028
202.028 |
124.032/052/066/092
129.063
140.032/033 |
| HFM-SFI system designation |
3.4 |
3.4 |
Cold start
ECT ° C approx.
Engine rpm
Starter signal circuit 50, during cranking HHT display
After start enrichment < 70° C maximum of 20 seconds HHT display
CTP contact HHT display
|
5)
5)
ON
ON
ON |
5)
5)
ON
ON
ON |
Warmup
Transmission selector lever position
Warmup speed (raised idle speed) time dependent
ECT <+20° C for approximately 20 seconds after start rpm
Warmup speed (raised idle speed) temperature dependent
ECT <0° C rpm
ECT 0 - 30° C rpm
ECT 30 - 40° C rpm
ECT >40° C rpm
Warmup HHT display
CTP contact (accelerator pedal not depressed) HHT display
AIR pump after >20 seconds HHT display
Selector lever HHT display
A/C compressor (not engaged) HHT display
IAT ° C
|
P/N D
1150±100
1000±50
950±50 850±50
750±50 650±50
700±50 600±50
<80° C ON
>80° C OFF
ON
OFF
ON
OFF
>20 |
P/N D
1150±100
1000±50
950±50 850±50
750±50 650±50
700±50 600±50
<80° C ON
>80° C OFF
ON
OFF
ON
OFF
>20 |
| 5) Temperature at which complaint occurs. |
| Engine |
104.942 |
104.992 |
| Models |
124.028 |
124.032/052/066/092 |
| HFM-SFI system designation |
3.4 |
3.4 |
Engine performance 6) (07-1203 or 07-1206) 9)
Engine speed rpm
Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA
Injection duration ms
Air mass kg/h
WOT recognition HHT display
Camshaft timing adjustment >2000 rpm HHT display
Intake manifold resonance flap HHT display
VSS mph (km/h)
Deceleration shut-off >2100 rpm HHT display
Output, 4-speed AT, TR 3 hp
|
5500
20 - 24
11 - 14
520 - 580
ON
OFF
ON
> 62 (100)
ON
141 7) |
5500
20 - 24
14 - 17
580 - 620
ON
OFF
ON
> 62 (100)
ON
160 |
6) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system.
Provide adequate cooling using external fan when checking wide open throttle performance.
7) As of 01/93, output at wide open throttle has been reduced by 4 hp.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.941 |
| Models |
202.028 |
| HFM-SFI system designation |
3.4 |
Engine performance 6) (07-1203 or 07-1206) 9)
Engine speed rpm
Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA
Injection duration ms
Air mass kg/h
WOT recognition HHT display
Camshaft timing adjustment >2000 rpm HHT display
Intake manifold resonance flap HHT display
VSS mph (km/h)
Deceleration shut-off >2100 rpm 8) HHT display
Output, 4-speed AT, TR 3 hp
|
5400
22 - 26
11 - 14
520 - 580
ON
OFF
ON
> 62 (100)
ON
141 |
6) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system.
Provide adequate cooling using external fan when checking wide open throttle performance.
8) On model 202, deceleration fuel shut off cannot be checked on a chassis dynamometer.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.991 |
| Models |
129.063 |
| HFM-SFI system designation |
3.4 |
Engine performance 6) (07-1203 or 07-1206) 9)
Engine speed rpm
Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA
Injection duration ms
Air mass kg/h
WOT recognition HHT display
Camshaft timing adjustment >2000 rpm HHT display
Intake manifold resonance flap HHT display
VSS mph (km/h)
Deceleration shut off >2100 rpm HHT display
Output, 5-speed AT, TR 3 hp
|
5500
20 - 24
14 - 17
580 - 620
ON
OFF
ON
> 62 (100)
ON
168 |
6) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system. Provide adequate cooling using external fan when check wide open throttle performance.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.994 |
| Models |
140.032 |
| HFM-SFI system designation |
3.4 |
Engine performance 6) (07-1203 or 07-1206) 9)
Engine speed rpm
Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA
Injection duration ms
Air mass kg/h
WOT recognition HHT display
Camshaft timing adjustment >2000 rpm HHT display
Intake manifold resonance flap HHT display
VSS mph (km/h)
Deceleration shut off >2100 rpm HHT display
Output, 5-speed AT, TR 3 hp
|
5500
20 - 24
14 - 17
580 - 620
ON
OFF
ON
> 62 (100)
ON
165 |
6) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system.
Provide adequate cooling using external fan when check wide open throttle performance.
9) Time Guide operation no. and/or SMS job no. |
| Engine |
104.941/942 |
104.991/992/994 |
| Models |
124.028, 202.028 |
124.032/052/066/092
129.063
140.032/033 |
| HFM-SFI system designation |
3.4 |
3.4 |
On-off ratio
Engine speed at idle rpm
Engine speed rpm
On-off ratio at WOT and TR 3 %
On-off ratio at upper partial load and TR "D", 75 mph (120 km/h),
32 hp (24 kW) %
On-off ratio at upper partial load and TR "D", 31 mph (50 km/h),
9 hp (7 kW) %
Exhaust gas back pressure mbar
|
600 - 800
3500
0 ± 10 constant
±10 oscillates
±10 oscillates
< 600 |
600 - 800
3500
0 ± 10 constant
±10 oscillates
±10 oscillates
< 700 |
|
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