Signal Too High - Permanent Fault

ECM-1100 OUTSIDE TEMPERATURE SENSOR
SIGNAL TOO HIGH - PERMANENT FAULT

Checking component and wiring



Check outside temperature sensor resistance. Check signal cable between control module #B29 (#B39) and outside temperature sensor #1 for a short-circuit to ground according to [1][2]Checking Wiring and Terminals. Permanent Fault

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

Remedy as necessary.

Other information:
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- To access/replace the outside temperature sensor, Outside Temperature Sensor, Replacing
- For resistance values, see Component Specifications. Specifications
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Read outside temperature.

Is the temperature within its permitted range?
Yes - Testing Complete.
No - Continue below.


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.