P0B7B Possible Causes
- Faulty intelligent battery unit
- Faulty HV battery assembly
What Does It Mean?
How to Fix Code P0B7B
Check the “possible causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0B7B Possible Symptoms
Check engine light on (or service engine soon warning light)
P0B7B Meaning
The HV battery uses nickel-metal hydride batteries and does not require external charging. The power management control ECU controls the HV battery’s SOC (state of charge) at a constant level during driving. The HV battery consists of 28 modules, and each module consists of eight 1.2V cells in series. The intelligent battery unit monitors the battery block voltage at 14 locations. Each battery block is composed of 2 modules in an assembly. The intelligent battery unit, which monitors the voltage of the battery blocks, determines that a malfunction has occurred if a voltage difference between the battery blocks exceeds the standard. When the malfunction detection condition is met, the power management control ECU (HV CPU) illuminates the malfunction indicator light (MIL) and sets a diagnostic trouble code (DTC).