Solenoid valve Y19
â–¶ How to fix
Check the signal to pin 51 in the connector for the gearbox control unit. Check the solenoid valve according to the section "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 retarder solenoid valve (Y19).
Possible cause
The gearbox control unit, pin 51, detects a short circuit to ground.The voltage has been below 19 V.