DTC B13BD-1C: Heated Steering Wheel Control Unit Power Supply Circuit Malfunction
B13BD:1C (DASH_ESU) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Heated steering wheel control unit power supply circuit malfunction |
| Detection condition |
- The dash-electrical supply unit detects a malfunction in the steering warmer control unit power supply circuit.
|
| Fail-safe |
- Stops the steering warmer output.
|
| Possible cause |
- DTCs are stored in the following modules.
- IG1 relay malfunction (Refer to [RELAY INSPECTION
]
).
- Malfunction in wiring harness (including connector/terminal) between IG1 relay and heated steering wheel control unit (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between heated steering wheel control unit and body ground (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Clock spring malfunction (Refer to [CLOCK SPRING INSPECTION
]
).
- Heated steering wheel control unit malfunction (Refer to [HEATED STEERING WHEEL CONTROL UNIT REMOVAL
]
). (Refer to [HEATED STEERING WHEEL CONTROL UNIT INSTALLATION
]
).
- Dash-electrical supply unit malfunction (Refer to [DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION
]
).
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See CLEARING DTC
.)
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Battery/lead-acid battery |
| 2 |
IG1 relay |
| 3 |
Clock spring |
| 4 |
Heated steering wheel control unit |