Signal Missing.

Signal missing.

Status check




- Ignition on.




- Go into scrolling values.
- Read off outside temperature.

Is the outside temperature displayed, within its permitted range?

Yes - Intermittent fault, Signal faulty

No - Checking the outside temperature sensor

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Checking the outside temperature sensor








- Ignition off.




- Disconnect outside temperature sensor.
- Measure outside temperature sensor resistance. The resistance should be approximately 600 ohms at +20°C

Was resistance OK?

Yes - Checking cables

No - Replacing component

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Replacing component
Replace outside temperature sensor according to Replacing sensor Replacing Sensor.

Continue - Verification

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Checking cables








Check cables between outside temperature sensor #1 and combined instrument panel #A24
and outside temperature sensor #2 and combined instrument panel #A25 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check cable connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.









Continue - Verification

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Verification













Hint: After carrying out the repair, check that the fault has been remedied as follows.
that the fault is corrected as follows:




- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Go into scrolling values.
- Read off outside temperature.

Is the outside temperature displayed, within its permitted range?

Yes - FAULT FOUND

No - Fault-tracing information

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Fault-tracing information
Verification indicates that the fault persists.

Do you want to exit fault-tracing?

Yes - No Fault Found

No - Status check

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Intermittent fault, Signal faulty.
Check cables between outside temperature sensor #1 and combined instrument panel #A24
and outside temperature sensor #2 and combined instrument panel #A25 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cable connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.









Continue - FAULT FOUND

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Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

Do you want to repeat fault-tracing?

Yes - Status check

No - No Fault Found

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