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)

INSPECT BATTERY THERMOMETER SENSOR

Resistance check

Measure the resistance according to the value (s) in the table below.

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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

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

Fig 1: Identifying Battery Thermometer Sensor Connector Terminals And Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - BATTERY THERMOMETER SENSOR)

Turn the ignition switch off.
Disconnect the H29 and H32 connectors from the HV control ECU.
Disconnect the B19 battery thermometer sensor connector.

Measure the resistance according to the value (s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

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)

TESTER CONNECTION AND SPECIFIED CONDITION

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: Disconnecting H29 And H32 Connectors From HV Control ECU

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE HYBRID VEHICLE CONTROL ECU