DTC U300E-13: Ignition Switch [Dash-Electrical Supply Unit (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 U300E:13 [DASH-ELECTRICAL SUPPLY UNIT (US)] DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Ignition switch |
| Detection condition |
- The dash-electrical supply unit detects that the IG1 power supply condition determined from the dash-electrical supply unit power supply circuit (IG1) is off even though the IG1 power supply condition received via CAN communication from body control module (BCM) is on.
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| Fail-safe |
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| Possible cause |
- IG1 relay No. 2 malfunction
- Dash-electrical supply unit connector or terminals malfunction
- F47 15 A fuse malfunction
- Short to ground in dash-electrical supply unit power supply circuit (IG1)
- Open circuit in dash-electrical supply unit power supply circuit (IG1)
- Dash-electrical supply unit malfunction
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 Courtesy of MAZDA MOTORS CORP.
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