Cold Start Valve

L-JETRONIC: TEST CHART

COLD START VALVE

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Operate:

Engine at idle speed with electrical plug disconnected from start valve.

Measure:

Voltage supply at cold start valve.

Value:

11-12.5 Volts between terminals 45 and 46 of the disconnected cold start valve plug with engine temperature below 86 F.
0 Volts between terminals as above with engine temperature above 104 F.

Deviation:

If values given are not reached, check thermo-time switch for proper function (see here). Check cables 45 and 46 for continuity.

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Measure:

Resistance of start valve coil windings.

Value:

About 4 Ohms between terminals 45 and 46 of cold start valve.

Deviation:

If winding is open (infinite resistance) or shorted (no resistance), replace cold start valve.