Signal Too Low. Permanent Fault
Signal too low. Permanent fault
Checking components and wiring
Check the resistance of the outside temperature sensor. Take the readings between the outside temperature sensor terminal #1 and #2.
Check the cable between climate control module terminal #B1 and outside temperature sensor terminal #2. Check for a short-circuit to ground.
Remedy as necessary.
Other information:
- For the resistance values, see Electrical / electronic system specifications [1][2]Specifications
- To replace the control module, see Comfort module Removal and Replacement
- To replace the outside temperature sensor, see Outside temperature sensor Removal and Replacement
- To connect the breakout box, see Connecting the breakout box, climate control module Connecting The Breakout Box
- For the voltage of the signal cable, see Climate control signal specifications Signal Specification
- 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.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Read off the outside temperature.
Check that the outside temperature reading is correct. Compare with the actual air temperature.
The fault has been remedied if the outside temperature is correct.
Is the temperature reading OK?
Yes - FAULT FOUND
No - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking components and wiring
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