Inspection Procedure

1. Turn the ignition switch to the ON position.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   HYBRID VEHICLE CONTROL ECU (VOLTAGE CHECK)
   
   

   Tester Connection	Specified Condition
   BS2 (H30-17) - BS2G (H30-28)	2.3 to 3.1 V

NG: Go to step   4 

OK: GO TO NEXT STEP 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CLEAR CODES.

1. Turn the ignition switch to the ON position.
2. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CURRENT CODES.
3. Read output DTCs. (See DTC CHECK / CLEAR )

   Result: 

   P3207-753 and P3208-754 are output. 

NO: CHECK FOR INTERMITTENT PROBLEMS 

YES: REPLACE HYBRID VEHICLE CONTROL ECU 

1. Disconnect the C21 rear circuit breaker sensor LH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   REAR CIRCUIT BREAKER SENSOR LH
   
   

   Tester Connection	Specified Condition
   SCR- (C21-1) - SCR+ (C21-2)	0.65 to 1.0 kΩ at 20°C ( 68°F)

   Fig 1: Inspecting Rear Circuit Breaker Sensor LH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR CIRCUIT BREAKER SENSOR LH 

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR