Component Inspection

HEV Battery System
P1B03 Auxiliary Battery Temperature Sensor Circuit - Inspection/Repair:_:Component Inspection

Component Inspection

Checking Auxiliary Battery Temperature Sensor part resistance
1. Ignition OFF.
2. Cool down the high voltage battery for more than 1 hour.
3. Remove the Safety Plug, check that terminal voltage is lower than 30V.
4. Disconnect the BMS ECU and check resistance on the signal and ground lines to the Auxiliary Battery Temperature Sensor.

Specification :About 2 - 100 kOhm±1%
25°C(77°F) reference, about 10kOhm±1%
70°C(158°F) reference, about 2.23kOhm±1%

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.




















5. Is the measured resistance within specification ?