DTC P0AE6-225: Hybrid Battery Precharge Contactor Control Circuit Low: Description
The SMRs (System Main Relays) are the relays that connect or disconnect the high voltage power system in accordance with commands from the hybrid vehicle control ECU.
The SMR system is composed of three SMRs and one system main resistor. SMRB and SMRG are located on the HV battery junction block in the HV battery pack. SMRP and the system main resistor are located in the hybrid vehicle converter (DC/DC converter) assembly in the HV battery pack.
To connect to the high voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. To shut off the high voltage power system, SMRB and SMRG are turned off.
When there is an open in the AMD line or IGCT line, the following DTCs are output:
| Trouble Area | Malfunction | DTC | Occurrence Condition |
|---|---|---|---|
| Open in AMD line | DC/DC converter malfunction | P0A08-264 | May not occur |
| Open in VLO, short to GND | P0A09-591 | May not occur | |
| IDH frequency error | P2519-766 | Occurs | |
| Open in SMRP, short to GND | P0AE6-225 | Occurs | |
| Open in DCIM, short to GND | P1507-207 | Occurs | |
| Open in IGCT line | Open in NODD, short to GND | P0A09-265 | Occurs |
| Open in VLO, short to GND | P0A09-591 | Occurs | |
| IDH frequency error | P2519-766 | Occurs | |
| Open in SMRP, short to GND | P0AE6-225 | Occurs | |
| Open in DCIM, short to GND | P1507-207 | Occurs |
P0AE6-225 is output first because the time required for diagnosis is the shortest.
| DTC NO. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0AE6 | 225 | Open or short to GND in the SMRP circuit |
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