B1312

Coolant temperature sensor, shorted to ground

Conditions
A diagnostic trouble code is generated if the resistance in the resistor is under 66 Ohms or over 100 KOhms.

Fault symptom
The temperature gauge needle is at the bottom position.

The radiator fan runs continuously.

Action
1 Unplug the engine temperature sensor connector and measure the resistance between pins 1 and 2, see table. Check both pins 1 and 2 for short circuit to ground. Localize and remedy the fault.
2 Unplug the connector to the Electronic Display Unit (EDU) control module and check the cable assembly between pin 34 on the control module and pin 1 on the engine temperature sensor for short circuit to ground.
3 If the fault remains, proceed to "Action Before Changing A Control Module".

Resistance at 0° C ( 32° F) kOhms 5,7
10° C ( 50° F) kOhms 3,7
20° C ( 68° F) kOhms 2,4
30° C ( 86° F) kOhms 1,6
60° C (140° F) Ohms 570
80° C (176° F) Ohms 300
100° C (212° F) Ohms 180
110° C (230° F) Ohms 140
120° C (243° F) Ohms 110