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 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   BS1 (H30-26) - BS1G (H30-34)	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.

NEXT: Go to next step 

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: 

   P3187-751 and P3188-752 are output. 

NO: CHECK FOR INTERMITTENT PROBLEMS 

YES: REPLACE HYBRID VEHICLE CONTROL ECU 

1. Disconnect the C22 rear circuit breaker sensor RH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   SCR- (C22-1) - SCR+ (C22-2)	0.65 to 1.0 kΩ at 20°C (68°F)

NG: REPLACE REAR CIRCUIT BREAKER SENSOR RH 

Fig 1: Identifying C22 Rear Circuit Breaker Sensor RH Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR