DTC U0001-88; U0100; U0140-00; U0155; Unit Communication Errors: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| Description |
U0001:88
- Unit communication error (HS-CAN)
U0100:00
- Communication error with PCM
U0140:00
- Communication error with front body control module (FBCM)
U0155:00
- Communication error with instrument cluster
|
| Detection condition |
- U0001:88
- The auto leveling control module detected CAN bus communication line (HS-CAN) malfunction ten times continuously.
- U0100:00
- The auto leveling control module could not receive CAN signal from the PCM for 5 s or more.
- U0140:00
- The auto leveling control module could not receive CAN signal from the front body control module (FBCM) for 5 s or more.
- U0155:00
- The auto leveling control module could not receive CAN signal from the instrument cluster for 5 s or more.
|
| Fail-safe |
- U0001:88
- The headlight leveling actuator is stopped at the position when the malfunction is determined.
- U0100:00
- The headlight leveling actuator is stopped at the position when the malfunction is determined.
- U0140:00
- The headlight leveling actuator is stopped at the position when the malfunction is determined.
- U0155:00
- Control of the headlight auto leveling system is continued.
|
| Possible cause |
- Malfunction in CAN bus communication line
- Malfunction in CAN communication line between PCM and auto leveling control module
- Malfunction in CAN communication line between front body control module (FBCM) and auto leveling control module
- Malfunction in CAN communication line between instrument cluster and auto leveling control module
|
| System wiring diagram |
Not applicable |