Signal Too Low

Signal too low

Checking outside temperature sensor function




- Ignition on.
- Read off outside temperature.
Check the outside temperature reading is correct. Compare with the actual air temperature.





Is the temperature reading OK?

Yes - Intermittent fault

No - Checking component and cables

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Checking component and cables
Check outside temperature sensor resistance. For resistance values, see Component resistance values Component Resistance Values.
Check cable between control module #7 and outside temperature sensor terminal 1 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To access the control module/connect breakout box see.
- To access/replace the outside temperature sensor see Replacing outside temperature sensor and glow plugs Service and Repair.
- With ignition on and outside temperature sensor connector disconnected, the voltage between outside temperature sensor connector terminal 1 (control module side) and ground should be approximately 5 V.
- For other values, see Signal specification Additional heater 912-D/B Signal Specification Additional Heater 912-D/B.














Continue - Verification

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Verification




Verification

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








- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Read off outside temperature.
Check the outside temperature reading is correct. Compare with the actual air temperature.





Is the temperature reading OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 outside temperature sensor function

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Intermittent fault
Check cable between control module #7 and outside temperature sensor terminal 1 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Remedy as necessary.

Other information:
- To access the control module/connect breakout box see.
- To access/replace the outside temperature sensor see Replacing outside temperature sensor and glow plugs Service and Repair.
- With ignition on and outside temperature sensor connector disconnected, the voltage between outside temperature sensor connector terminal 1 (control module side) and ground should be approximately 5 V.
- For other values, see Signal specification Additional heater 912-D/B Signal Specification Additional Heater 912-D/B.













Continue - Fault-tracing information
DONE

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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Attempt New Test - Checking outside temperature sensor function

FAULT-TRACING FAILED - DONE

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