Lexus ES: Hybrid/EV Battery ECU Multiple Reset (P1AFF00)
DESCRIPTION
The battery ECU assembly monitors its internal operation and will store these DTCs when it detects an internal malfunction.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
P1AFF00 | Hybrid/EV Battery ECU Multiple Reset | ECU internal malfunction (1 trip detection logic) | Battery ECU assembly | Does not come on | Master Warning Light: Comes on |
CONFIRMATION DRIVING PATTERN
HINT:
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
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Connect the Techstream to the DLC3.
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Turn the power switch on (IG) and turn the Techstream on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the power switch off and wait for 3 hours or more.
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Turn the power switch on (IG) and turn the Techstream on.
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With power switch on (IG) and wait for 3 seconds or more.
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Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
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Check the DTC judgment result.
HINT:
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.
PROCEDURE
1. | REPLACE BATTERY ECU ASSEMBLY |
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