ad0761p200004a

Notes on HHT for ME-SFI gasoline injection and ignition system

Type ad · emne 07.61 · version 0108 · 2003-06-06

Gælder for: ENGINES 104.941 /943 /944 /991 /994 as of 1.8.96 ENGINE 104.995 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 with CODE (498) as of Model Year 97 Japanese version ENGINES 111.921 /942 as of 1.9.98, 111.943, 111.944 as of 1.8.96, 111.946 as of 1.6.98, 111.947 /973, 111.975 as of 1.8.96 ENGINE 111.945 in MODELS 208.335 /435 as of 1.6.98, 202.020 /080 as of 1.9.98 ENGINE 111.974 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE

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Placering

Funktionsgruppe 1 Motor › 07 Blandingstilberedning › 07.61 Benzinindsprøjtnings- og tændingssystem ME — Serie 202 (modeller 020, 080) · Serie 208 (modeller 335, 435) · Serie 463 · Serie 638

EinPAS 25 bilens ledningsnet/netværk/multifunktion › 25.15 netværk/multifunktion › 25.15.1 Grundinformation — Serie 202 (modeller 020, 080) · Serie 208 (modeller 335, 435) · Serie 463 · Serie 638

Gælder også for motorer/gearkasser: 104 941, 104 943, 104 944, 104 991, 104 994, 104 995, 111 921, 111 942, 111 943, 111 944, 111 945, 111 946, 111 947, 111 950, 111 973, 111 974, 111 975, 111 980, 112 910, 112 911, 112 920, 112 921, 112 923, 112 940, 112 941, 112 942, 112 943, 112 945, 113 940, 113 942, 113 943, 113 961, 113 962, 120 ***

AD07.61-P-2000-04A

Notes on HHT for ME-SFI gasoline injection and ignition system

Troubleshooting with HHT

Diagnostic trouble code memory: Select current fault

If the current status changes, e.g. due to a loose connector, the change is indicated visually and acoustically so that troubleshooting can take place immediately with the HHT.

Loose contacts

Loose contacts are stored if they occur a number of times within a certain time interval. Therefore, they can only occur as stored faults and never as current faults.

Specified values

All the specified values for the actual values displayed in the HHT are given in the engine diagnosis manual.

Actual value for engine speed

For the engine speed, the idle speed specified value calculated by the control module is displayed on the left of the HHT display and the engine speed actual value is on the right.

The two values should only deviate slightly. The permissible tolerances have not been stipulated as yet.

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Version coding with HHT

a) Before removing the ME-SFI control module, read out and save any available code numbers using HHT ("Version coding" menu item). After installing the new control module, input the stored code numbers.

If the new control module is returned to the parts warehouse, the code numbers must be deleted.

b) If the code numbers cannot be read out, the automotive version must be determined, the corresponding code numbers taken from the parts microfilm, group 54, and entered manually using the HHT.

Drive authorization system stage 2 (DAS)

After replacing the ME-SFI control module, version coding and then also the identification must be performed and the vehicle identification number entered (refer to HHT actual values for "Drive authorization system").

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Correction program

The following corrections can be made with the HHT:

(Refer to HHT menu item "Correction program")

1. Correction of the ignition for various fuels (RON)

2. Correction of the quantity of fuel in the case of complaints (MKV)

3. Correction of the idle speed in selector lever position P/N

4. Correction of the selector lever idle speed in driving gear

5. CO-setting for vehicles without TWC (not for Model 638)

6. Correction of the delay in the case of complaints
For Model 638: Electric suction-type fan for engine/AC

7. Make fault setting conditions for irregular engine running recognition

less sensitive
For Model 638: correction of the delay in the case of complaints

8. Desensitize the irregular engine running recognition