Signal Too Low

Signal too low

Checking the connector








- Ignition off
- Check the wiring and connectors. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the outside temperature.
If the temperature is now within its permitted range, the fault was caused by loose connections in the connector.

Other information
- To access and replace the outside temperature sensor, see Replacing sensor Replacing Sensor.













Is the temperature within its permitted range?

Yes - FAULT FOUND

No - Checking components and wiring

-------------------------------------------------

Checking components and wiring
Check the resistance of the outside temperature sensor.

Note! The outside temperature sensor may be defective if there was a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor.

Check the signal cable between control module terminal #B29 (#B39) and outside temperature sensor terminal #1. Check for a short-circuit to supply voltage. Check for an open-circuit.

Hint: With the ignition on and the outside temperature sensor connector disconnected, the voltage between #1 and ground must be approximately 5 V.

Check the ground lead between control module terminal #B4 (#B14) and outside temperature sensor terminal #2. Check for an open-circuit.
Remedy as necessary.

Other information:
- To connect the breakout box / access the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box
- To access and replace the outside temperature sensor, see Replacing sensor Replacing Sensor
- For resistance values, see Component specifications Specifications
- For information about signals, see Signal specification Signal Specifications
- Checking wiring and terminals Checking Wiring and Terminals.













Continue - Verification

-------------------------------------------------

Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Read off outside temperature.





Is the temperature within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

-------------------------------------------------

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

------------------------

Attempt New Test - Checking the connector

-------------------------------------------------