SAAB WIS ONLINE

Temperature sensor, engine coolant

Temperature sensor, engine coolant



The temperature sensor is used to inform the engine control module of the current coolant temperature.

The temperature sensor connections are


1. Sensor ground: Pin 1 on the temperature sensor is connected to pin 95 on the engine control module.

2. Signal, water temperature: Pin 2 on the temperature sensor is connected to pin 99 on the engine control module.


The sensor is of type NTC and is supplied with 5 V from the engine control module through a 1 kΩ resistor.

The resistance of the temperature sensor changes with the temperature as follows:

20 °C (68 °F)

3550 Ω ±7%

100 °C (212 °F)

180 Ω ±3%



Diagnostics

If the control module registers an incorrect signal on the sensor input, DTC P0116 will be generated.

If the sensor input is short-circuited to ground, DTC P0117 will be generated.

If the sensor input is short-circuited to B+, DTC P0118 will be generated.

System reaction to a fault


• The control module uses a substitute coolant temperature value of -20°C at start ad +60°C when the engine is running.

• The pedal position sensor is adjustable to max 60%.