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B1746

Read the instructions below then start the fault diagnostic procedure.

Symptom: The external temperature function is faulty.

B1746


Outdoor Temperature Sensor. Open Circuit / Short to B+


Fault symptoms

The external temperature function is faulty.

Type of diagnosis

Continuous

Enable criteria

Ignition ON

Fault criteria

In case of an open circuit, the resistance of the circuit is greater than 415 kohm.

In case of a short circuit to ground, the resistance of the circuit is less than 100 ohm.

Diagnostic help

The value for ambient temperature (unfiltered/filtered) can be read with the diagnostic tool.

The displayed ambient temperature can be adjusted with the diagnostic tool ± 5°C.

Checking the wiring harness

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.