Modern Nissan vehicles utilize an Intelligent Battery Sensor (IBS) attached to the negative battery terminal. The IBS is a mechatronic device that measures:
The IBS calculates the State of Charge (SOC) and State of Health (SOH) of the battery. It communicates this data to the ECM via a Local Interconnect Network (LIN) bus or a dedicated signal wire. The ECM uses this data to regulate the alternator duty cycle, adjusting charging voltage based on the battery's needs (often referred to as "Decoupling" or "Load Dump" strategies).
If corrosion is found:
You don’t always need a check engine light to know something is wrong. Here’s what you’ll typically experience when P155B00 is active:
Nissan’s service procedure: Activate the "Battery Resistance Learning" function if your scan tool supports it. The system will apply a small load and measure each module’s voltage drop. A module dropping more than 0.3V under load indicates a high-resistance fault.
Modern Nissan vehicles utilize an Intelligent Battery Sensor (IBS) attached to the negative battery terminal. The IBS is a mechatronic device that measures:
The IBS calculates the State of Charge (SOC) and State of Health (SOH) of the battery. It communicates this data to the ECM via a Local Interconnect Network (LIN) bus or a dedicated signal wire. The ECM uses this data to regulate the alternator duty cycle, adjusting charging voltage based on the battery's needs (often referred to as "Decoupling" or "Load Dump" strategies).
If corrosion is found:
You don’t always need a check engine light to know something is wrong. Here’s what you’ll typically experience when P155B00 is active:
Nissan’s service procedure: Activate the "Battery Resistance Learning" function if your scan tool supports it. The system will apply a small load and measure each module’s voltage drop. A module dropping more than 0.3V under load indicates a high-resistance fault.