DESCRIPTION
The hybrid vehicle control ECU monitors its internal operation, it will store a DTC and perform fail-safe control if it detects the following malfunction. If the following DTC is output, replace the hybrid vehicle control ECU.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
P0A1D-721 | Hybrid Powertrain Control Module | ECU internal malfunction (1 trip detection logic) | Hybrid vehicle control ECU | Comes on | Master Warning Light: Comes on |
P0A1D-722 | Hybrid Powertrain Control Module | ECU internal malfunction (1 trip detection logic) | Hybrid vehicle control ECU | Comes on | Master Warning Light: Comes on |
P0A1D-723 | Hybrid Powertrain Control Module | ECU internal malfunction (1 trip detection logic) | Hybrid vehicle control ECU | Comes on | Master Warning Light: Comes on |
P0A1D-787 | Hybrid Powertrain Control Module | ECU internal malfunction (1 trip detection logic) | Hybrid vehicle control ECU | Comes on | Master Warning Light: Comes on |
P0A1D-818 | Hybrid Powertrain Control Module | ECU internal malfunction (1 trip detection logic) | Hybrid vehicle control ECU | Comes on | Master Warning Light: Comes on |
MONITOR DESCRIPTION
The hybrid vehicle control ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the hybrid vehicle control ECU checks the result of the ECM self-test. If the hybrid vehicle control ECU detects a "Fail" from the ECM self-test, it will conclude that there is an internal malfunction in the ECM and will illuminate the MIL and store a DTC.
MONITOR STRATEGY
Related DTCs | P0A1D (INF 721/722/723/787/818): Monitor CPU malfunction |
Required sensors/components | Hybrid vehicle control ECU |
Frequency of operation | Continuous |
Duration | TMC's intellectual property |
MIL operation | Immediately |
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored | TMC's intellectual property |
Other conditions belong to TMC's intellectual property | - |
TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property | - |
COMPONENT OPERATING RANGE
Hybrid vehicle control ECU | DTC P0A1D (INF 721/722/723/787/818) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
CAUTION / NOTICE / HINT
HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
PROCEDURE
1. | REPLACE HYBRID VEHICLE CONTROL ECU |
Click here
NEXT | COMPLETED |