Signal Too High

Signal too high

Checking outside temperature sensor




- 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 connectors

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Checking connectors








- Ignition off
- Corrective action to remedy outside temperature sensor and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check any damage etc.
- To remove the control module, see Replacing ECC control module Removal and Replacement.
- To access the outside temperature sensor, see Replacing outside temperature sensor (Electronic climate control) Removal and Replacement.
- Reinstall components, reconnect connectors etc.
- Ignition on.
- Read off outside temperature.
Check the outside temperature reading is correct. Compare with the actual air temperature.
If temperature is now OK this indicates that the fault was caused by poor contact in the connectors.





Is the temperature reading OK?

Yes - FAULT FOUND

No - Checking components and cables

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Checking components and cables
Check outside temperature sensor resistance. For resistance values, see ECC electrical specifications [1][2]Electrical Specifications.
Check cable between ECC control module #A19 and outside temperature sensor terminal 2 for an open-circuit 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 between control module #A22 and outside temperature sensor terminal 4 for an open circuit 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.

Hint: A short-circuit on the ground lead can be caused by a short-circuit to supply voltage. Always check the signal cable for this fault cause as well.

Remedy as necessary.

Other information:
- To install a new outside temperature sensor, refer to Replacing outside temperature sensor (Electronic climate control) Removal and Replacement.
- To connect the breakout box, see Connection of breakout box ECC Connection of Breakout Box ECC.
- The voltage on the signal cable varies with temperature. At 20 °C (68°F) voltage should be approximately 2.5 V. For other values, see Signal specification ECC Signal Specification ECC.














Continue - Verification
DONE

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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.
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

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Intermittent fault
Check outside temperature sensor and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cable between ECC control module #A19 and outside temperature sensor terminal 2 for an intermittent open-circuit 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 between control module #A22 and outside temperature sensor terminal 4 for an open-circuit 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.
Remedy as necessary.

Other information:
- To remove the control module, refer to Replacing ECC control module Removal and Replacement.
- To access the outside temperature sensor, see Replacing outside temperature sensor (Electronic climate control) Removal and Replacement.
- To connect the breakout box, see Connection of breakout box ECC Connection of Breakout Box ECC.
- The voltage on the signal cable varies with temperature. At 20 °C (68°F) voltage should be approximately 2.5 V. For other values, see Signal specification ECC Signal Specification ECC.














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

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