Temperature Sensor

L-JETRONIC: TEST CHART

TEMPERATURE SENSOR

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Measure:

Resistance of temperature sensor.

Value:

2-3 kOhms at 68 F between ECU plug terminals 13 and 17 (ground). At 14 F, 7-12 kOhms, at 176 F, 250-400 Ohms.

Deviation:

Meter reads infinite resistance:
Check temperature sensor directly at terminals on sensor. If sensor resistance is ok, replace cables. If tester shows 0 Ohms (continuity) at sensor terminals, replace sensor.

Meter reads 0 Ohm (continuity):
Pull plug from sensor. If meter at ECU plug then reads infinite, replace sensor. If not, replace cables.