Signal Too High

Signal too high

Checking the diagnostic trouble codes (DTCs)
Check which of the following alternatives apply when reading off diagnostic trouble codes (DTCs) for the climate control module (CCM).

Alternative 1
If the diagnostic trouble code (DTC) is stored with one or more other diagnostic trouble codes (DTCs), and the diagnostic trouble code (DTC) for direction control, this indicates a fault in the matrix network governing direction control.
The damper motors are connected in series in the matrix network governing direction control. In the event of a fault in the network, a diagnostic trouble code (DTC) will be stored for all damper motors which are in motion at the same time.
The following are probable fault causes:
- short-circuit between the wiring in the matrix network
- short-circuit to supply voltage
- short-circuit to ground
- damaged damper motor.
Check if the diagnostic trouble code (DTC) has been stored with any of the following diagnostic trouble codes (DTCs):
- CCM-0011
- CCM-0013
- CCM-0014
- CCM-0015
- CCM-0016
- CCM-0017
- CCM-0018

Alternative 2
Check whether the diagnostic trouble code (DTC) has only been stored with the diagnostic trouble codes (DTCs) for direction control, CCM-0017 and CCM-0018.

Select the relevant alternative

1 - Checking the wiring

2 - Checking components and wiring

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Checking components and wiring
Check the signal cable between control module terminal #B19 and damper motor terminal #1. Check for a short-circuit to ground.
Check the damper motor resistance. The resistance must be 46 ohms. Take readings between the damper motor terminal pins.
Remedy as necessary.

Other information:
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM).
- Climate control module (CCM), replacing Service and Repair.
- Damper motor temperature, replacing Service and Repair.
- Signal specification Pinout Values and Diagnostic Parameters.
- Checking wiring and terminals Checking Wiring And Terminals.

Continue - Equipment

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Checking the wiring

- Ignition off
- Disconnect connector B on the climate control module (CCM).
- Ignition on
Check the matrix wiring. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.
Take readings between the following terminals on connector B and ground:
- #B11 (#11)
- #B12 (#12)
- #B13 (#13)
- #B14 (#14)
Check whether there is an internal short-circuit in the matrix cables. Take pairs of readings between all the terminals #B11-#B14 on connector B.

Other information:
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- Climate control module (CCM), replacing Service and Repair.
- Damper motor temperature, replacing Service and Repair.
- Signal specification Pinout Values and Diagnostic Parameters.
- Checking wiring and terminals Checking Wiring And Terminals.

Was a fault detected?

Yes - Equipment

No - Checking the component

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Checking the component

- Ignition on
Check the damper motors. Check for internal short-circuits as follows:
- Remove the soundproofing panel to access the damper motor connectors.
- Erase the diagnostic trouble codes (DTCs) for the climate control module (CCM).
- First disconnect the connector from a damper motor. Leave the other damper motors connected.

Note! Take care when disconnecting the connectors for the damper motors to prevent loose connections.

- Activate the controls (right and left-hand temperature knobs, defroster, air distribution selector, recirculation) on the climate control module (CCM) to operate all the damper motors.
- Read off the diagnostic trouble codes (DTCs) from the climate control module (CCM). If the diagnostic trouble codes (DTCs) have not recurred, there is an internal fault in the disconnected damper motor.
- If the diagnostic trouble codes (DTCs) recur, continue fault tracing. Reconnect the disconnected damper motor and disconnect the next damper motor. Repeat the procedure by erasing all diagnostic trouble codes (DTCs) and running the damper motors until the faulty damper motor has been identified.

Other information:
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM).
- Climate control module (CCM), replacing Service and Repair.
- Damper motor temperature, replacing Service and Repair.
- Signal specification Pinout Values and Diagnostic Parameters.
- Checking wiring and terminals Checking Wiring And Terminals.
- For information about the positioning of the damper motors in the matrix network, see the relevant section in the Wiring diagram.

Continue - Equipment

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Equipment
Which type of climate control is the car equipped with?
1. ECC
2. Manual climate control (MCC) / Standard (STD)

Select one of the above alternatives.

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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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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VERIFICATION FAILED - Information

VERIFIED - Fault Found

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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 the diagnostic trouble codes (DTCs)

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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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.

- 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, 0-100%
- Recirculation damper motor, 40-100%
- Damper motor air distribution, defroster approximately 0%, floor/defroster approximately 19%, floor approximately 39%, ventilation approximately 83%.