DTC B1D00-13: Headlight (LH) Circuit Malfunction [Auto Leveling Control Module]: Notes
WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1D00:13 (AUTO LEVELING CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE
| Description |
Headlight (LH) circuit malfunction |
| Detection condition |
- The auto leveling control module detected an open circuit in the headlight (LH) circuit during the headlight LO on control with the ignition switched ON (engine off or on).
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| Fail-safe |
- Control of the headlight auto leveling system is continued.
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| Possible cause |
- DTCs are stored in the electrical supply unit (ESU).
- Headlight LO (LH) circuit malfunction
- Front combination light (LH) connector or terminal malfunction
- Auto leveling control module connector or terminal malfunction
- Short to ground in wiring harness between the following terminals:
- Auto leveling control module terminal J-Front combination light (LH) terminal M
- Open circuit in wiring harness between the following terminals:
- Auto leveling control module terminal J-Front combination light (LH) terminal M
- Front combination light (LH) malfunction
- Auto leveling control module malfunction
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 Courtesy of MAZDA MOTORS CORP.
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