Signal Too High
Signal too high
Checking the function of the blower fan
- Ignition on
- Turn the blow fan selector to zero
- Activate the blower fan relay
- Check the blower fan operates at maximum speed when activated.
The fault is intermittent if the blower fan operates at maximum speed when activated.
Is the function OK?
Yes - Intermittent fault
No - Checking the cable and component
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Checking the cable and component
Check the signal cable between climate control module terminal #A24 and blower fan relay terminal #3. Check for a short-circuit to supply voltage.
Try a new blower fan relay if the cable is OK.
Remedy as necessary.
Other information:
- To access and replace the blower fan relay, see Replacing the blower fan relay Service and Repair
- To connect the breakout box, see Connecting the breakout box, climate control module Connecting The Breakout Box
- For the voltage of the signal cable, see Climate control signal specifications Signal Specification
- For the resistance values, see Electrical / electronic system specifications [1][2]Specifications
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Turn the blow fan selector to zero
- Activate the blower fan relay.
The fault is remedied if the blower fan operates at maximum speed when activated.
Is the function OK?
Yes - FAULT FOUND
No - 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 the function of the blower fan
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Intermittent fault
Check the signal cable between climate control module terminal #A24 and blower fan relay terminal #3. Check for an intermittent short-circuit to supply voltage.
Other information:
- To access and replace the blower fan relay, see Replacing the blower fan relay Service and Repair
- To connect the breakout box, see Connecting the breakout box, climate control module Connecting The Breakout Box
- For the voltage of the cable, see Climate control signal specifications Signal Specification
- For the resistance values, see Electrical / electronic system specifications [1][2]Specifications
- Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults
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 the function of the blower fan
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