#
ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR-CD (RF Turbo)]

BME014018841W04

  Note

  • Perform the following test only when directed.

## Resistance Inspection

1. Place the ECT sensor in water with a thermometer, and heat the water gradually.

2. Measure the resistance between the ECT sensor terminals using an ohmmeter.

  • If not as specified, replace the ECT sensor.

Specification

Water temperature (°C {°F}) | Resistance (kilohm)
--- | ---
20 {68} | 2.21-2.69
80 {176} | 0.29-0.34

## Circuit Open/Short Inspection

1. Inspect for open/short circuit in the following wiring harnesses.

  • If there is open/short circuit, repair or replace wiring harness.

### Open circuit

  • Signal circuit
  - ECT sensor terminal A and PCM terminal 87
  • GND circuit
  - ECT sensor terminal B and PCM terminal 91

### Short circuit

  • Signal circuit
  - ECT sensor terminal A and PCM terminal 87 to power circuit
  - ECT sensor terminal A and PCM terminal 87 to GND