Signal Too Low

Signal too low

Checking damper motor control




- Engine running
- Blower fan on.
Activate the button for air distribution.
Check that the air flow changes.

Does the air flow change?

Yes - Checking the wiring

No - Checking the circuit

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Checking the circuit








- Ignition off
- Disconnect connector B on the climate control module (CCM).
Check connector B on the climate control module (CCM) and the damper motor connector. Check for contact resistance and oxidation. Check for damage carefully.
Check the signal cable between the climate control module (CCM) and the damper motor. Check for an open-circuit by measuring the resistance between terminals #B22 (#21) and #B11-#B14 (#11-#14).

Other information:
- To access or replace the control module, see Climate control module (CCM), replacing Service and Repair
- To access or replace the damper motor, see Damper motor temperature, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.





Was a fault detected?

Yes - Checking the cable

No - Checking the cable

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Checking the cable








- Ignition off
- Disconnect connector B on the climate control module (CCM)
- Disconnect the connector on the air distribution damper motor.
Check the signal cable. Check control module connector terminal #B22 (#22) and damper motor connector terminal #1. Check for an open-circuit.
Check the wiring on the matrix network between air distribution damper motor terminals #3-#6 and climate control module (CCM) terminals #B11-#B14 (#11-#14). Check for an open-circuit.
Remedy as necessary.

Other information:
- To access or replace the control module, see Climate control module (CCM), replacing Service and Repair
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- To access or replace the damper motor, see Damper motor temperature, replacing Service and Repair
- For other values, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.







Continue - Query

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Checking the cable




- Ignition on.
Check the signal cable between climate control module (CCM) terminal #B22 (#22) and damper motor terminal #1. Check for a short-circuit to supply voltage.





Was a fault detected?

Yes - Query

No - No Fault Found

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Checking the wiring
Check control module terminal #B22 and damper motor connector terminal #1. Check for contact resistance and oxidation. Check for loose connections. Check for damage carefully.
Check the signal cable between control module terminal #B22 and damper motor terminal #1. Check for an intermittent open-circuit.
Check the wiring between air distribution damper motor terminals #3-#6 and climate control module (CCM) terminals #B11-#B14 (#11-#14). Check for an intermittent open-circuit.
Check the signal cable between control module terminal #B22 and damper motor terminal #1. Check for an intermittent short-circuit to supply voltage.

Continue - Verfification

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Query
Select which type of climate control the car is equipped with.
1. Electronic climate control
2. Manual climate control (MCC) / Standard (STD).

Select an alternative.

1 - Self-adjustment 1

2 - Self-adjustment 2

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Self-adjustment 1

Hint: After replacing the control module or damper motor, and when a damper motor or link has been removed, carry out self adjustment to define the damper motor limit positions.




- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Activate self adjustment.






Continue - DONE

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DONE - Verification

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Self-adjustment 2

Hint: After replacing the control module or damper motor, and when a damper motor or link has been removed, carry out self adjustment to define the damper motor limit positions.




- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Activate self adjustment.






Continue - DONE

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DONE - Verification

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Verification


Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
- Blower motor on.
Check that damper motor position changes by changing control on climate control module (CCM). The values given below are the standard values that the damper motor positions should give.

Note! Blower motor must be in operation to activate the damper motors.

- Left/right temperature damper motor and defroster, 0-100%
- Recirculation damper motor, 40-100%
- Floor/ventilation damper motor, floor only approximately 39%, ventilation only approximately 87% and floor/ventilation approximately 71%.





Does damper motor work?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Information

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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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Attempt New Test - Checking damper motor control

No Fault Found - No Fault Found

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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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FAULT FOUND - DONE

Attempt New Test - Checking damper motor control

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