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Inspection Procedure

CHECK FOR DTC
1. Delete the DTC (See DTC CHECK/CLEAR ).
2. Check for DTCs again.
  OK: No DTC is output.
1. NG: Go to step 2
2. OK: GO TO NEXT STEP
  END

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - HYBRID VEHICLE CONTROL ECU)

Disconnect the P6 and H14 ECU connectors.

Measure the resistance of the wire harness side connectors.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION CHART

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

Fig 1: Disconnecting P6 And H14 ECU Connectors

G02617855

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP

CHECK OPERATION OF POWER SOURCE CONTROL ECU
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.
1. NG: Go to HYBRID CONTROL SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
2. OK: GO TO NEXT STEP
  NORMAL (POWER SOURCE CONTROL ECU DEFECTIVE)