B1605, B1675, B1676, B1677
Symptom: B1675, B1676 and B1677 can be caused by a fault in the relevant flap motor. First carry out fault diagnosis on the respective flap motor. The driver stage is mounted inside the ACC control module and cannot be changed separately.
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B1605
,
B1675
,
B1676
,
B1677
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Control module fault, stepping motor driver stage, air distributor, recirculation flap and air blending flap
Fault symptom:
B1675, B1676 and B1677 can be caused by a fault in the relevant flap motor. First carry out fault diagnosis on the respective flap motor. The driver stage is mounted inside the ACC control module and cannot be changed separately.
Conditions
B1605: Control module fault B1675: Driver stage, air distribution flap B1676: Driver stage, recirculation flap B1677: Driver stage, air blending flap
Diagnostic procedure
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1.
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Clear the trouble code and check that it is generated afresh before starting on point 2.
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2.
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Carry out fault diagnosis on the relevant flap motor. This should be done even if no such trouble code is generated. Stepping motor for air distributor, see
. Stepping motor for air blending flap, see
. DC motor for recirculation flap, see
.
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3.
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Proceed to
.
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