DTC P1A80-00: Hybrid/EV Battery Stack 1 Delta SOC High; DTC P1AD0-1B: Hybrid/EV Battery Block Circuit Resistance Above Threshold [04/2018 - 08/2020]: Description
WARNING: This page is about a different car, the 2020 Toyota Avalon and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
The battery voltage sensor and the hybrid vehicle control ECU calculate the SOC (state of charge) of the HV battery through the accumulated amperage in the HV battery. The battery voltage sensor sends the condition of the HV battery to the hybrid vehicle control ECU. Then the hybrid vehicle control ECU calculates the SOC based on the information and controls the charging and discharging of the HV battery based to the driving condition.
Based on the HV battery voltage and current, the battery voltage sensor calculates the resistance and judges if the HV battery has deteriorated.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P1A80-00 | Hybrid/EV Battery Stack 1 Delta SOC High | Difference in capacity between each battery block is larger than standard. (2 trip detection logic) |
|
Comes on | Master Warning Light: Comes on |
| P1AD0-1B | Hybrid/EV Battery Block Circuit Resistance Above Threshold | Resistance of an HV battery block exceeds the specified value. (1 trip detection logic) |
|
Comes on | Master Warning Light: Comes on |
RELATED DATA LIST
| DTC No. | Data List |
|---|---|
| P1A80-00 |
|
| P1AD0-1B |
HINT:
- *1: Under normal conditions, the values of Hybrid Battery Block 1, 2, 9, 10 and 11 Voltage will be approximately 16 V and Hybrid Battery Block 3, 4, 5, 6, 7 and 8 Voltage will be approximately 32 V.
- If there is a short or open in a battery block voltage detection line, the value of Hybrid Battery Block Voltage for the corresponding battery block will be lower than 8 V.
The following items can be helpful when performing repairs:
Data List
- Ready Signal
- Vehicle Speed
- Accelerator Position
- Shift Position
- Engine Speed
- Hybrid Battery Voltage
- Hybrid Battery Current
- BATT Voltage
- Hybrid Battery SOC of Immediately after IG ON
- Hybrid Battery Maximum SOC
- Hybrid Battery Minimum SOC
- Total Distance Traveled
- Distance from DTC Cleared
- Engine Run Time
- Number of Battery Current Sensor Characteristics Determination
Vehicle Control History Data
- Hybrid Battery Voltage Low
HINT:
- This DTC can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes. (As 2 trip detection logic is also used, check for DTCs including pending DTCs.)
- This DTC may not be stored if the vehicle is stopped or being driven at a steady speed.
- When the internal resistance of the HV battery increases, hybrid battery block voltage may drop.
- If resistance is abnormal, the voltage of the battery blocks indicated by the DTCs are likely to decrease more than others during acceleration (discharging), and increase more during deceleration (charging).
- In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
- Make sure the air intake port is not blocked.
- Make sure there are no gaps between the connecting parts of the ducts.
- Clean the No. 1 HV battery intake filter.
- Clear the DTCs to reset the learning values even if no DTCs are stored.