Signal Too Low
Signal too low
Checking the cable and component
Check the cable between climate control module terminal #A14 and temperature damper motor terminal #2. Check for a short-circuit to ground.
Applies to left-hand drive cars only
Check the cable between climate control module terminal #A12 and air distribution damper motor terminal #6. Check for a short-circuit to ground.
Applies to right-hand drive cars only
Check the cable between climate control module terminal #A12 and air distribution damper motor terminal #2. Check for a short-circuit to ground.
If the cables are OK, try a new damper motor.
Remedy as necessary.
Other information:
- To access the temperature damper motor, see Temperature damper motor Temperature
- To access or replace the air distribution damper motor, see Damper motor for air distribution Air Distribution
- 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
Was a fault detected?
Yes - Self-adjustment of the shutter motor end position
No - Intermittent fault
-------------------------------------------------
Self-adjustment of the shutter motor end position
Self-adjustment of damper motor end positions
Self-adjustment of damper motor end positions. Electronic climate control (ECC), Manual climate control (MCC), Standard (STD)
Note! Self-adjustment must be carried out if the control module or damper motor is replaced or the damper motor or its linkage has been removed. The indication LED on the climate control module panel will flash during adjustment.
Hint: During self-adjustment the control module runs the damper motors to their limit positions. The control module then stores the value returned from the position sensor for the damper motor. The control module is then able to operate the motor betweenthe limit positions during normal operation.
- Start the engine (the generator charges)
- Activate self-adjustment. The self-adjustment takes thirty seconds.
Note! Self-adjustment can only be carried out once in the same ignition cycle. To run the self-adjustment again, switch off the ignition, wait 10 seconds and start the engine again.
The indication LED stops flashing when the self-adjustment is complete.
Continue - FAULT FOUND
------------------------
FAULT FOUND - Verification
-------------------------------------------------
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Start the engine. Run it to normal operating temperature
- Start the blower fan
- Slowly turn the temperature selector between the minimum and maximum positions.
Check that the air is hot and cold.
Turn the air distribution selector between its positions.
Check that the air distribution changes for each air damper.
The fault has been remedied if the functions are OK.
Is the function OK?
Yes - FAULT FOUND
No - Fault-tracing information
-------------------------------------------------
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
------------------------
Attempt New Test - Checking the cable and component
-------------------------------------------------
Intermittent fault
Check the cable between climate control module terminal #A14 and temperature damper motor terminal #2. Check for an intermittent short-circuit to ground.
Applies to left-hand drive cars only
Check the cable between climate control module terminal #A12 and air distribution damper motor terminal #6. Check for an intermittent short-circuit to ground.
Applies to right-hand drive cars only
Check the cable between climate control module terminal #A12 and air distribution damper motor terminal #2. Check for an intermittent short-circuit to ground.
Other information:
- To access the temperature damper motor, see Temperature damper motor Temperature
- 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 - Self-adjustment of the shutter motor end position
-------------------------------------------------
Self-adjustment of the shutter motor end position
Self-adjustment of damper motor end positions
FAULT FOUND - Fault-tracing information
-------------------------------------------------
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
------------------------
Attempt New Test - Checking the cable and component
-------------------------------------------------