MPU speed feedback signal value has not been requested by ESTA
1. Make sure no other fault is present that could be the cause of bad CAN transmission. - Perform checks of cable harness and connectors between ECU and MPU - CAN high and CAN low. - Check ECU and MPU CAN termination impedance - 120 ohm each, or 60 ohm combined (i.e. harness connected). 2. Check for available software updates/campaigns that could be related. 3. Test for intermittent SW failure: - Run diagnostic SelfTest - Check if DTC turns passive. - If DTC is still active - erase all DTC and re-run diagnostic SelfTest. - Drive vehicle and check if DTC appears again. 4. If DTC reappears - error trace or replace MPU electric motor (M1003).
What you'll see
No driver-visible symptom recorded.
System reaction
Red Steer tag axle fault warn ESTA in released or fixed mode
Diagnostic depth
The MPU electric motor has sent/echoed a motor speed feedback value that has not been requested by ESTA.
• Faulty harness or connectors - MPU (M1003) 6-pin Deutsch DT connector. • Faulty MPU electric motor • Faulty SW