P0A1D / INF162
P0A1D-162, P0A1D-821, P0A1D-822, P0A1D-823Description
The hybrid vehicle control ECU monitors its internal operation and detects malfunctions.
DTC Logic
DTC Detection Logic
The hybrid vehicle control ECU performs diagnostic monitoring to verify proper operation of internal ECU systems. For this diagnostics monitor, the hybrid vehicle control ECU checks the communication bus off count and the message register of the CAN (Controller Area Network) controller. If the hybrid vehicle control ECU detects an error in the communication bus off count or message register, it will conclude that there is a malfunction in the hybrid vehicle control ECU. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.
Diagnostic Procedure
Step 1-2:
