W/Harness Inspection

HEV Battery System
P0AA6 Hybrid Battery Voltage System Isolation Fault - Inspection/Repair:_:W/Harness Inspection

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?






Checking the isolation resistance of high voltage battery system

Cheking the isolation resistance of high voltage battery sytstem.
1. Ignition OFF.
2. Connect the GDS.
3. Ignition ON. (SSB LED "BLUE")
4. Select "Current Data".
5. Check "Isolation Resistance of the High Voltage Battery".

Specification :Isolation resistance greater than 2000kOhms

WARNING:
** Warning & Notice
Hybrid Battery system uses around 270V voltage.
It may cause death or damage due to electrical shock, if you do not follow below Instructions.
▪ Follows instructions of workshop manual.
▪ Wear and use insulated glooves and tools.
▪ IG "OFF", Disconnect ground cable of auxiliary battery and "OFF" the safety connector of the high voltage battery.
▪ Check high voltage terminal on Power Relay Assembly is lower than 30V.
▪ Be careful that it should not be short between terminals when measuring battery cell voltage. You may be injured due to spark, parts damage or electrical shock.
▪ Metalic material cause high voltage short that may cause damage of life or vehicle. Therefore, get rid of all the metalic material before working. (Metalic Material : Watch, Ring, any metalic products etc.)
▪ After disconnect W/H goes to BMS ECU from High voltage battery, be careful not to happen short between exposed terminal and terminal on high voltage connector.




Fig.1) SOC 46.% of high voltage battery,(Current Data) - the isolation resistance of high voltage battery in the Key on status
6. Is the measured value within specification ?