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Home >> BMW >> 2011 >> Alpina B7L >> Repair and Diagnosis >> Engine Performance >> System >> Self Diagnosis - Diagnostic Trouble Codes - DTC P14C0 - DTC U1179 (N63 & S63) >> Diagnostic Trouble Codes (DTCS) MSD85 - Bn2020 >> DTC P151B, BMW Hex Code 0x215208, BMW Code 2183688: Battery Sensor Wakeup Circuit >> Repair procedures (plant/service)

Repair procedures (plant/service)

intermittent open circuits

-IBS disconnected, Terminal 15 off, wake-up wire shorted to positive: Check wake-up wire and other components connected to the wake-up wire

-IBS disconnected, Terminal 15 off, wake-up wire shorted to ground: Check wake-up wire

-IBS connected, Terminal 15 off, wake-up wire shorted to positive: Replace IBS IBS connected, Terminal 15 on, wake-up wire shorted to ground: