Oil temperature sensor for retarder
â–¶ How to fix
Check the voltage to pin 3 in the connector for the gearbox control unit. Check the temperature sensor for retarder oil temperature. Refer to "Checking solenoid valves and sensors".
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Incorrect signal from the temperature sensor for retarder oil temperature.
Possible cause
The gearbox control unit, pin 3, has detected that the voltage is, or has been, below 0.5 V.