Short circuit to battery on proportional valve (PWM Output 5).
â–¶ How to fix
1. Check cable harness and connectors between ACSX (E752) and proportional valve (V542). 2. Check functionality of the proportional valve through a resistance reading. Valve should have a resistance of approx. 7-8 ohms. Replace it if resistance is very high or close to zero.
What you'll see
Proportional valve is not working, with a high risk of maximum damping applied (valve fully closed). It may require a lot of force to bend the articulation.
System reaction
Red ACS stop lamp Speed Limitation
Diagnostic depth
Detection
Higher current level than anticipated detected in circuit connecting to proportional valve.
Possible cause
- Defect cable harness - Defect connectors - Defect proportional valve