DTC B13C3-29: Communication Error Between Body Control Module (BCM) And LF Control Unit
B13C3:29 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Communication error between the body control module (BCM) and the LF control module |
| Detection condition |
- The body control module (BCM) detects communication error with the LF control module for 10 times.
|
| Fail-safe |
- Inhibits the door lock/unlock control using the advanced keyless entry system.
|
| Vehicle status when DTCs are output |
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See CLEARING DTC
.)
|
| Inspection/action procedure |
- Proceed with the inspection/action in the order from Step 1 below.
- After part repair or replacement, perform the repeatability verification procedure and perform a DTC inspection. (See DTC INSPECTION
)
- If the DTC inspection indicates the same DTC again, go to the next step.
- Inspect the wiring harness (including connector/terminal) between the LF control module and the body control module (BCM).
Purpose/reason (possible cause)
Malfunction in wiring harness (including connector/terminal) between the LF control module and the body control module (BCM)
Referred to service information item
(See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Inspect the LF control module.
Purpose/reason (possible cause)
LF control unit malfunction
Referred to service information item
(See LF CONTROL UNIT INSPECTION
.)
- Body control module (BCM) malfunction (Refer to [BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION
]
).
Purpose/reason (possible cause)
Body control module (BCM) malfunction (no other possible malfunction considered)
Referred to service information item
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION
)
|
Refer to SYSTEM WIRING DIAGRAMS
.
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Body control module (BCM) |
| 2 |
LF control unit |
| Function explanation (DTC detection outline) |
|