DTC THC_d0001: Powertrain Coolant Inlet Temp Sensor Malfunction [09/2013 - ]: Procedure

1. Inspect the coolant temperature sensor (for drive unit). Refer to INSPECTION [09/2013 - ] .

NG → See step   3 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect connector D12 from the coolant temperature sensor (for drive unit) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect connector L32 from the thermal control ECU.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   D12-1 (PTT) - L32-10 (PTT)	Power switch off	Below 1 Ω
   D12-2 (PTTG) - L32-20 (PTTG)	Power switch off	Below 1 Ω
   D12-1 (PTT) or L32-10 (PTT) - Body ground and other terminals	Power switch off	1 kΩ or higher
   D12-2 (PTTG) or L32-20 (PTTG) - Body ground and other terminals	Power switch off	1 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Coolant Temperature Sensor (for Drive Unit))
   *b	Front view of wire harness connector (to Thermal Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4