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Coolant Temperature Sensor/Switch (For Computer)

Sensors and Switches › Sensors and Switches - Powertrain Management
Unified entry — merged from multiple cross-listed pages in the original manual.

Parts

PartCoolant Temp Sensor
ManufacturerCHY
OEM part #5149096AB
Price$6.10
PartCoolant Temp Sensor
ManufacturerCHY
OEM part #5149096AB
Price$6.10

Labor

Replace — Coolant Temp Sensor0.4 hr
Warranty 0.0 hrSkill B
Replace — Coolant Temp Sensor0.4 hr
Warranty 0.0 hrSkill B
Procedures
Engine Coolant Temperature Sensor - Installation4 steps
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Apply thread sealant to sensor threads.
  2. Install sensor to engine.
  3. Tighten coolant temperature sensor to 11 Nm (8 ft. lbs.) torque.
  4. Replace any lost engine coolant.
Engine Coolant Temperature Sensor - Removal3 steps
⚠ WARNING
Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Partially drain cooling system.
  2. Disconnect electrical connector from sensor.
  3. Remove sensor from intake manifold.
Engine Coolant Temperature Sensor - Operationreference
OPERATION At key-on, the Powertrain Control Module (PCM) sends out a regulated 5 volt signal to the ECT sensor. The PCM then monitors the signal as it passes through the ECT sensor to the sensor ground (sensor return). When the engine is cold, the PCM will operate in Open Loop cycle. It will demand slightly richer air-fuel mixtures and higher idle speeds. This is done until normal operating temperatures are reached. The PCM uses inputs from the ECT sensor for the following calculations: -for engine coolant temperature gauge operation through the bus communications -Injector pulse-width -Spark-advance curves -ASD relay shut-down times -Idle Air Control (IAC) motor key-on steps -Pulse-width prime-shot during cranking -O2 sensor closed loop times -Purge solenoid on/off times -EGR solenoid on/off times (if equipped) -Leak Detection Pump operation (if equipped) -Radiator fan relay on/off times (if equipped) -Target idle speed
Engine Coolant Temperature Sensor - Installation4 steps
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Apply thread sealant to sensor threads.
  2. Install sensor to engine.
  3. Tighten coolant temperature sensor to 11 Nm (8 ft. lbs.) torque.
  4. Replace any lost engine coolant.
Engine Coolant Temperature Sensor - Removal3 steps
⚠ WARNING
Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Partially drain cooling system.
  2. Disconnect electrical connector from sensor.
  3. Remove sensor from intake manifold.
Engine Coolant Temperature Sensor - Operationreference
OPERATION At key-on, the Powertrain Control Module (PCM) sends out a regulated 5 volt signal to the ECT sensor. The PCM then monitors the signal as it passes through the ECT sensor to the sensor ground (sensor return). When the engine is cold, the PCM will operate in Open Loop cycle. It will demand slightly richer air-fuel mixtures and higher idle speeds. This is done until normal operating temperatures are reached. The PCM uses inputs from the ECT sensor for the following calculations: -for engine coolant temperature gauge operation through the bus communications -Injector pulse-width -Spark-advance curves -ASD relay shut-down times -Idle Air Control (IAC) motor key-on steps -Pulse-width prime-shot during cranking -O2 sensor closed loop times -Purge solenoid on/off times -EGR solenoid on/off times (if equipped) -Leak Detection Pump operation (if equipped) -Radiator fan relay on/off times (if equipped) -Target idle speed