Long story short

Bought a alphard hybrid 05 for project car

First scan, p3140, c1310, p1259

Solve p3140, someone opened inverter over and unplug service plug switch connector


Clear the code , and then become p3000

spend sometimes eventually found out block 10 voltage only got 3-7 v , but those cell are good

and realise might be service plug big fuse gone ,( but weird, i can measure whole battery 22x V, but block 10 low voltage.

try to use jumper leads short 2 cell, bring block 10 to 15v , clear code, now p3000 gone


Try to start go into ready mode, but nothing happen

scan again got p3004…..

anyone got idea what should i do next step?

is it bad HV battery ECU?
or even inverter?

when i try to start, i can hear HV battery contactor click, but system seems refuse to go into ready mode

Hi, is the 12v battery good? monitor the voltage when the ignition is turned on if it drops below 10-11 v this will affect the ECU's, they won't play.

The HV battery cells are all connected in series so only as good as the weakest cell, just like a chain. If there was a problem with block 10 you would get code P3020

P3004 depends on what the sub code is:

-131 When the EV battery fuse is blown, the service plug grip is dislodged, or the high voltage wiring resistance is broken.

-132 Inverter voltage sensor abnormality or high voltage wiring resistance increase

-133 Abnormal signal received from battery computer ASSY

-268 Inverter voltage signal is out of sync with HV battery voltage