Inspection Procedure

1. Delete the DTC (see DTC CHECK / CLEAR ).
2. Check for DTCs again.

   OK : No DTC is output. 

OK : END 

NG : GO TO NEXT STEP 

1. Disconnect the P6 and H14 ECU connectors.
Fig 1: Identifying Power Source Control ECU & Hybrid Vehicle Control ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE TESTER CONNECTION SPECIFICATION
   
   

   Tester Connection	Specified Condition
   P6-39 (STSW) - H14-5 (ST2)	Below 1 Ω
   P6-39 (STSW) or H14-5 (ST2) - Body ground	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK : GO TO NEXT STEP 

1. After replacing the power source control ECU with a normally functioning ECU, check that the hybrid control system can start normally.

   OK : Hybrid control system can start normally. 

NG : GO TO HYBRID CONTROL SYSTEM 

OK : NORMAL (POWER SOURCE CONTROL ECU DEFECTIVE)