Diagnostic trouble code BCU 523924.00 is triggered when the power module PC0 detects that the total amperage exceeds 40 amps at outputs B3, C3, and D3, which include the E31L Xenon (HID) worklight on the rear of the roof (left). This excessive current typically indicates a short to ground or a defective component within one…

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Diagnostic trouble code BCU 523921.19 is triggered when the output for switching the worklights on the rear of the roof (E11/2 or E31R) is erroneously energized by more than one control unit. This issue typically results from a misconfiguration within the CAN (Controller Area Network) bus system, leading to multiple control units attempting to control…

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Diagnostic trouble code BCU 523921.12 is activated when the power module PC0 detects a current exceeding 1 amp in lead 1087, despite the worklights on the rear of the roof (either E11/2 or E31R xenon (HID) worklights) being switched off. This unexpected current flow typically indicates a short in the circuit or an internal fault…

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Diagnostic trouble code BCU 523921.09 is triggered when there is a communication issue between the power module PC0 and the Basic Control Unit (BCU) concerning the worklights on the rear of the roof (either E11/2 or E31R). The problem involves intermittent or nonexistent reception of one or more CAN (Controller Area Network) messages from the…

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Diagnostic trouble code BCU 523921.05 is triggered when the power module PC0 measures a current of less than 500 mA in lead 1087, even though the worklights on the rear of the roof (E11/2 or E31R) are switched on. This condition indicates an open circuit, suggesting a break or disconnection in the electrical pathway that…

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Diagnostic trouble code BCU 523921.04 is activated when the power module PC0 records a current exceeding 15 amps in lead 1087 while the worklights on the rear of the roof (E11/2 /E31R) are switched on. This unusually high current condition typically indicates a short to ground within the circuit, which can lead to overheating, potential…

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Diagnostic trouble code BCU 523921.01 is triggered when the power module PC0 measures a supply voltage of less than 3 volts at lead 0782 while the worklights on the rear of the roof (E11/2 /E31R) are activated. This low voltage reading suggests a power supply fault in the circuit, potentially due to inadequate wiring, poor…

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Diagnostic trouble code BCU 523921.00 is activated when the power module PC0 detects that the total amperage exceeds 40 amps at the B3, C3, and D3 outputs. These outputs are associated with various worklights and lights on the rear and sides of the roof, specifically: Output B3: E11/2 /E31R Worklights on Rear of Roof. Output…

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Diagnostic trouble code BCU 523920.19 is triggered when there is a communication error involving the outer worklights on the front of the roof (E18/2), specifically the output being energized by more than one control unit. This error typically results from a misconfiguration in the CAN (Controller Area Network) bus system, leading to multiple signals being…

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Diagnostic trouble code BCU 523920.12 is activated when the power module PC0 detects a current exceeding 1 amp in lead 1047, despite the outer worklights on the front of the roof (E18/2) being switched off. This unexpected current flow typically indicates a short in the circuit or an internal fault within the power module, which…

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Diagnostic trouble code BCU 523920.09 is triggered when there is a communication issue between the power module PC0 and the Basic Control Unit (BCU), specifically regarding the outer worklights on the front of the roof (E18/2). The problem involves intermittent or non-existent reception of one or more CAN (Controller Area Network) messages from the BCU…

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