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MID 128 PID 85 FMI 9Severity: Warning

MID 128 PID 85 FMI 9: Cruise Control Status - Abnormal Update (Volvo)

Quick Answer

Cruise Control Status - Abnormal Update (Volvo)

Code
MID 128 PID 85 FMI 9
Severity
Warning
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.

Common Symptoms

  • Cruise Control does not work
  • Cruise control status may be unavailable to the engine control module

Likely Causes

  • Missing (Cruise Control) signal from VECU
  • No clutch info to EMS (J1939)

Common Fixes

  • Check VECU for fault codes
  • Verify cruise control switch operation
  • Inspect clutch switch signal
  • Check J1939 data link integrity
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What does MID 128 PID 85 FMI 9 mean?

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Cruise Control Status - Abnormal Update (Volvo)

Detailed guide for MID 128 PID 85 FMI 9

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MID 128 PID 85 FMI 9 - Cruise Control Status

**Fault Type:** Abnormal update rate

Fault Condition

  • Missing (Cruise Control) signal from VECU

Possible Symptoms

  • Cruise Control does not work

Possible Causes

  • No clutch info to EMS (J1939)
  • Communication failure between VECU and EMS
  • VECU not broadcasting cruise control status

System Information

The Vehicle Electronic Control Unit (VECU) monitors cruise control switches (Set/Decel, Resume/Accel) and broadcasts this information on the data links.

Diagnostic Tips

1. Check VECU for fault codes related to cruise control

2. Verify cruise control switch operation with diagnostic tool

3. Inspect clutch switch signal (cruise disables with clutch application)

4. Check J1939 data link wiring and communication

5. Verify cruise control enable conditions are met

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