DTC P0AE6-225 Hybrid Battery Positive Contactor Circuit Stuck Open; DTC P0AE7-224 Hybrid Battery Positive Contactor Circuit Stuck Closed: Description
The SMRs (System Main Relays), installed in the HV relay assembly, connect and disconnect the high-voltage power supply circuit in accordance with requests from the HV control ECU. To ensure a reliable operation, there are three SMRs in total (one for the negative side and two for the positive side).
To connect, SMR1 and SMR3 turn on initially. Then, SMR2 turns on and SMR1 turns off. This process protects the circuit from the high-voltage surge current by allowing the limit current to flow via the resistor. To disconnect, SMR2 and SMR3 turn off in that order. The HV control ECU checks that the relays have turned off properly.
The HV control ECU monitors operation of the SMRs (CON1, CON2, CON3) to check for malfunctions.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0AE6 | 225 | Short to GND in the SMR1 (CON1) circuit |
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| P0AE7 | 224 | Open or +B short in SMR1 (CON 1) circuit |
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