Accumulator solenoid valve (Y2)
â–¶ How to fix
Check the signal to pin 8 in the connector for the gearbox control unit. Check the accumulator solenoid valve. Check earth connection G504 and connectors according to the circuit diagram for the ZF automatic gearbox, refer to group 16.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Incorrect signal from the solenoid valve for the retarder accumulator.
Possible cause
The gearbox control unit, pin 8, has detected a short circuit to positive.The voltage has exceeded 7.5 V.