Signal Too High
Signal too high
DTC status ECM-1100 Outside temperature sensor. Signal too high
Reading of DTC status ECM-1100
Note! When reading off the DTC status, other stored diagnostic trouble codes (DTCs) and their status will be listed.
- Read off the DTC status. Check the status of the relevant Diagnostic Trouble Code (DTC).
Was the status of the relevant Diagnostic Trouble Code (DTC) displayed as permanent?
Yes - Checking the outside temperature sensor
No - Intermittent fault
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Intermittent fault
Signal too high. Intermittent fault
Checking wiring and connectors
Check the control module and outside temperature sensor connectors for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the signal cable between control module connector #B29 (#B41) and outside temperature sensor terminal 1 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 the ground lead between control module #B4 (#B16) 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.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access/replace the control module, see
- To localize the outside temperature sensor, see Location of components Locations
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Fault-tracing information
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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 wiring and connectors
DONE - DONE
FAULT FOUND - DONE
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DONE - DONE
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Checking the outside temperature sensor
- Ignition on.
Read off the external temperature sensor's signal by clicking on the symbol for VCT2000. Compare with table in link below.
Other information:
- Outer temperature sensor Outer Temperature Sensor
- Location of components Locations
- Signal specification Signal Description / Specification
Is the signal OK?
Yes - Intermittent fault
No - Checking connector
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Checking connector
- Ignition off.
Check outside temperature sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Other information:
- To localize the outside temperature sensor, see Location of components Locations.
Continue - Checking wiring and components
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Checking wiring and components
Check outside temperature sensor resistance. For resistance values, see Outside temperature sensor Outside Temperature Sensor.
Check signal cable between control module connector #B29 (#B41) and outside temperature sensor terminal 1 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: With the ignition on and outside temperate sensor connector disconnected the voltage between terminal 1 and ground terminal should be approximately 5 V.
Check the ground lead between control module #B4 (#B16) and outside temperature sensor terminal 2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Other information
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- Engine control module (ECM), replacing Service and Repair
- To localize the outside temperature sensor, see Location of components Locations
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Verification
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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
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - DTC status ECM-1100 Outside temperature sensor. Signal too high
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