Inspection Procedure

HINT:

Use the intelligent tester to read the freeze frame data and information. Part of the engine running conditions at the time of the malfunction is recorded as freeze frame data and information. This information is useful when troubleshooting the malfunction. (Engine speed, engine load, engine coolant temperature, engine output demand value, ambient temperature, auxiliary battery voltage, intake air temperature, elapsed time after turning the ignition switch on, and other information)

1. INSPECT BATTERY THERMOMETER SENSOR 
   1. Resistance check
      1. Measure the resistance according to the value(s) in the table below.

         Standard Resistance 

         BATTERY THERMOMETER SENSOR
         
         

         Tester Connection	Specified Condition
         1 - 2	1.91 to 2.05 kΩ at 24 to 26°C ( 75 to 79°F)

         Fig 1: Inspecting Battery Thermometer Sensor

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

         HINT:

         The auxiliary battery must be removed to inspect the battery thermometer sensor. Record DTCs, freeze frame data, and other information before removing the auxiliary battery.

   NG: REPLACE BATTERY THERMOMETER SENSOR 

   OK: GO TO NEXT STEP 

2. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - BATTERY THERMOMETER SENSOR) 
   1. Turn the ignition switch off.
   2. Disconnect the H29 and H32 connectors from the HV control ECU.
   3. Disconnect the B19 battery thermometer sensor connector.
   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for open) 

      HV CONTROL ECU - BATTERY THERMOMETER SENSOR (CHECK FOR OPEN)
      
      

      Tester Connection	Specified Condition
      THB (H29-30) - THB (B19-1)	Below 1 Ω
      E2 (H32-28) - E2 (B19-2)	Below 1 Ω

      Standard Resistance (Check for short) 

      HV CONTROL ECU - BATTERY THERMOMETER SENSOR (CHECK FOR SHORT)
      
      

      Tester Connection	Specified Condition
      THB (H29-30) - THB (B19-1) - Body ground	10 kΩ or higher
      E2 (H32-28) - E2 (B19-2) - Body ground	10 kΩ or higher

      Fig 2: Checking Harness And Connector (HV Control ECU - Battery Thermometer Sensor)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE HYBRID VEHICLE CONTROL ECU