Signal Too Low

Signal too low

Checking the fan for the passenger compartment temperature sensor




- Ignition on.
Check using a hand that the fan for the passenger compartment temperature sensor is blowing.
The fault is intermittent if the fan is now is working.

Is the fan working?

Yes - Checking the connectors and wiring

No - Checking the component and wiring

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Checking the connectors and wiring




- Ignition off
- Disconnect the connector for the climate control module (CCM)
- Disconnect the connector for the fan/passenger compartment temperature sensor.

Note! If there is an open-circuit in the wiring for the power supply and ground, the climate control module (CCM) will not power the fan.

Check the power supply to the fan. Check for an intermittent short-circuit to ground. Take readings on the cable between fan terminal #4 (#24) and chassis ground.
Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Remedy as necessary.

Other information:
- For further information about the connectors, fuses and relays, see the Wiring Diagram
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- Signal description Signal Description, Climate Control Module (CCM)
- Component location Component Location, Climate Control Module (CCM)
- Climate control module (CCM) Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Checking the component and wiring

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Checking the component and wiring




- Ignition off
- Disconnect the connector for the climate control module (CCM)
- Disconnect the connector for the fan/passenger compartment temperature sensor.

Hint: If there is an open-circuit in the wiring for the power supply and ground, the climate control module (CCM) will not power the fan.

Check the power supply to the fan. Check for a short-circuit to ground. Take readings on the cable between fan terminal #4 (#24) and chassis ground.
Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Remedy as necessary.

Other information:
- For further information about the connectors, fuses and relays, see the Wiring Diagram
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- Signal description Signal Description, Climate Control Module (CCM)
- Component location Component Location, Climate Control Module (CCM)
- Climate control module (CCM) Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check by feeling with a hand that the fan is blowing.

Is the fan working?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the fan for the passenger compartment temperature sensor

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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 fan for the passenger compartment temperature sensor

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