Coolant Temperature Sensor Short Circuit to Ground – The Blog of www.obd2tool.com

Possible Causes:

1. Internal short circuit in the coolant temperature sensor wiring harness.
2. Faulty coolant temperature sensor.

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Diagnosis:

1. Disconnect the coolant temperature sensor and MECU. Use a multimeter to check connectivity between circuit numbers 4303B and 4069. Refer to the provided photograph for reference.
   
2. Measure the resistance between the coolant temperature sensor…