The error code, ATC 001546.04, is triggered when the control unit measures 0 volts at the signal input for the heater valve positioning potentiometer (B131, lead 918). This absence of voltage typically indicates a short to ground in the circuit, which can disrupt the operation of the heater valve, leading to improper heating control within…

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The error code, ATC 001546.03, is triggered when the control unit detects a voltage exceeding 5 volts at the signal input for the potentiometer of the heater valve (B131, lead 2038). This abnormally high voltage typically indicates that the circuit is either shorted to a power supply lead or is open, which can lead to…

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The error code, ATC 001551.04, indicates that the voltage in the A/C pressurizer blower motor circuit is too low. This condition can be caused by issues such as poor wiring connections, a depleted battery, a malfunctioning alternator, or faults within the voltage regulator or power supply system. Low voltage can prevent the blower motor from…

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The error code, ATC 001551.03, indicates that the voltage in the A/C pressurizer blower motor circuit is excessively high. This abnormal voltage could be due to issues such as a fault in the power supply, improper wiring, or a malfunction within the voltage regulator or control unit, leading to potential risks of overheating and damage…

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The error code, ATC 001079.04, is triggered when the voltage measured at the positive lead (lead 2093) for the power supply of the 5-volt components falls below 0.5 volts. These components include the defog sensor (B143), refrigerant pressure sensor (B130), heater valve (B131), and motor for adjusting the air distribution flaps (B132). A voltage this…

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The error code, ATC 001079.03, is triggered when the voltage measured at the positive lead (lead 2093) of the power supply for the 5-volt components exceeds 5 volts. These components include the defog sensor (B143), refrigerant pressure sensor (B130), heater valve (B131), and motor for adjusting the air distribution flaps (B132). A voltage higher than…

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The error code, ATC 000923.19, is triggered when the outputs for switching the fan motors (M07 and M10) are energized by more than one control unit, leading to potential conflicts or errors in the operation of the fan motors. This condition suggests a misconfiguration or communication error within the CAN BUS system, where multiple control…

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The error code, ATC 000923.12, is triggered when the power module (HF) PC6 detects current in excess of 1 amp at one or both fan motor outputs (lead 2043 and/or lead 2047) while the fan motors (M07 and M10) are switched off. This condition typically indicates a short in the circuit or an internal fault…

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The error code, ATC 000923.09, indicates a problem with the data transfer between the power module (HF) PC6 and the ATC control unit regarding the fan motors (M07 and M10). Issues such as intermittent or nonexistent reception of one or more CAN messages can stem from loose wires or connectivity problems within the CAN BUS…

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The error code, ATC 000923.04, is triggered when the power module (HF) PC6 measures current exceeding 30 amps at one or both fan motor outputs (lead 2043 and/or lead 2047) while the fan motors (M07 and M10) are activated. This high current reading typically indicates a short to ground within the circuit, which can cause…

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The error code, ATC 000923.03, indicates that the voltage in the circuit between the circulation blower motor and the blower motor controller is excessively high. This abnormal voltage condition could be caused by issues such as a fault in the blower motor controller, incorrect wiring, or a malfunction within the power supply system, leading to…

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