Testing Start Device

Testing start device

- Connect testers:
- pressure gauge (043) 103 589 00 21 00,
- double fitting (044)102 589 06 63 00,
- multimeter (003),
- ohm decade (038) 124 589 09 63 00,
- test cable (033) 102 589 04 63 00.
- Test fuel pressures and internal leaktightness. Testing and Inspection
- Check start valve operation and for leaks.
- Test post-start enrichment test.

Special Tools:

Commercially Available Tester:

Engine 102.961 version USA:
Start valve control by thermo-time switch (S26).

a) If engine speed is too low after the cold start
Compress shaped hose. If engine speed does not change, the idle air control valve is jamming and must be replaced.

b) Engine speed too high at normal operating temperature
Compress formed hose. If there is a significant change in engine speed, the idle air control valve is jamming or is not electrically heated.

Key To Symbols:

Notes
- If the specified value of a test step, e. g. step 4.0, is in order, it is not necessary to perform test step 4.1
- Different component designations are possible depending on wiring diagram or in the case of vehicles with optional equipment. These designations are given in parentheses.

Test Steps 1.0 - 1.3:

Test Steps 1.3 - 3.0:

Test Steps 3.0 - 4.0:

Testing post-start enrichment