DTC U0401-68: Error Signal Received From Pcm, DSC HU/Cm, Instrument Cluster, Or Body Control Module (BCM) [Vehicle Control Module (Us)]: Outline
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0401:68 (VEHICLE CONTROL MODULE - US) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Error signal received from PCM, DSC HU/CM, instrument cluster, or body control module (BCM) |
| Detection condition |
- When any of the following conditions is met.
- The vehicle control module (VCM) receives the following error signal from the PCM for 5 min.
- Clutch stroke signal (MTX)
- Neutral sensor signal (MTX)
- Engine speed
- Accelerator pedal opening angle
- The vehicle control module (VCM) detects that the brake signals between the following modules did not match for 10 s while the brake pedal is operated.
- PCM
- DSC HU/CM
- Body control module (BCM)
- The vehicle control module (VCM) detects that a fail-safe is operated based on a deceleration request for 30 min while the vehicle is being driven.
|
| Fail-safe |
(See DTC TABLE [VEHICLE CONTROL MODULE (US)] .) |
| Possible cause |
- PCM malfunction
- Brake switch malfunction
- Brake fluid pressure sensor malfunction (built into DSC HU/CM)
- Cruise control switch malfunction
- Neutral sensor malfunction (MTX)
- Accelerator pedal position sensor malfunction
- DSC HU/CM malfunction
- Instrument cluster malfunction
- Vehicle control module (VCM) malfunction (built into body control module (BCM))
- Body control module (BCM) malfunction
|
| System wiring diagram |
Not applicable |
| Connector diagram |
Not applicable |