Diagnostic Manual, Engines, Volume 1
Engine 104.980/981 CFI from start of production
| Engine |
104.980/981 |
| CFI system designation |
5.2 |
On-off ratio/DTC readout (CFI)
On-off ratio readout with ignition: ON
Engine coolant temperature >80°C %
Engine coolant temperature <70°C %
DTC readout, engine at closed throttle |
50
30
1 1) |
Current at EHA
Ignition: ON mA
After start enrichment and warmup
After start enrichment at +20 °C engine coolant temperature mA
Warmup base value at+20°C engine coolant temperature mA
Engine coolant temperature +80°C mA
Enrichment during acceleration and at
+20°C engine coolant temperature mA
Engine at operating temperature
Part load mixture correction mA
Wide open throttle enrichment at 2000 rpm mA
Deceleration fuel shut off approx. mA
|
20
1 - 3; >0 to <8 sec.
0 - 1; >12 to 120 sec.
readout oscillates
>15
readout oscillates
2 - 4
-40 |
| 1) For test conditions refer to Diagnostic Manual, Engine Vol. 2. |
| Engine |
104.980/981 |
| CFI system designation |
5.2 |
Ignition timing and dwell
Engine speed rpm
Ignition timing with vacuum BTDC
Engine speed rpm
Ignition timing with vacuum BTDC
Ignition timing without vacuum BTDC
Dwell  °
Dwell % |
650-750
6 - 10
3200
34 - 38
21 - 25
24 - 53
40 - 88
|
| Engine |
Model |
MB Part No. |
Ignition adjustment ° CA |
Resistance  /k |
| 104.980/981 |
124/129 |
015 545 67 28 |
0 |
2.4 k |
| Note: If the reference resitor fails, then the igntion is retarded 3° at wide open throttle. |
| Engine |
104.980/981 |
| CFI system designation |
5.2 |
Closed throttle ( idle)
Selector lever position/Transmission range
Engine oil temperature °C approx.
Closed throttle (idle) speed rpm
Control range mA
On-off ratio readout during deceleration fuel shut-off %
|
P/N D
80 80
650 - 750 <700
600±50 <600
95 |
Engine coolant temperature °C
Closed throttle warm-up speed rpm
Engine coolant temperature °C
Closed throttle warm-up speed rpm
|
-30 to +25
1100±30
>+25 to +80
declines continuously
to 700±50 |
Vacuum mbar
Lambda control ontrol range % |
500 - 650
50±20 2) |
| 2) This value must be measured at idle and at 2500 rpm with the purge line disconnected and plugged. |
| Engine |
104.980/981 |
| CFI system designation |
5.2 |
Engine systems control module (ESCM)
Cut off speed rpm
Kickdown, automatic transmission rpm |
7000±50
6700±50 |
Engine performance 4)
Engine speed rpm
Output, manual transmission, 3rd gear, Model 129 hp
Output, 4-speed AT, transmission range 3, Model 124 hp
Output, 5-speed AT, transmission range 3, Model 129 hp |
5500
176 
158
166 |
4) These are minimum performance values. Do not exceed speed of 80 mph.
Check performance only at simulated engine coolant temperature of 80 oC (use 2 resistance substitution units) |
|
Printable version
