DTC B2405: Sub Bus LIN Module Communication Malfunction: Procedure
- CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - MAP LIGHT)
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- Disconnect the S62 ECU connector.
- Disconnect the X6 Map light connector.
- Measure the resistance and voltage according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition S62-9 (LIN) - X6-2 (LIN) Always Below 1 Ω S62-9 (LIN) or X6-2 (LIN) - Body ground Always 10 kΩ or higher Standard voltage
Tester Connection Condition Specified Condition S62-9 (LIN) or X6-2 (LIN) - Body ground Always Below 1 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY AND BODY GROUND)
- Disconnect the X4 map light connector.
- Measure the resistance and voltage according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition X4-16 (GND9) - Body ground Always Below 1 Ω Standard voltage
Tester Connection Condition Specified Condition X4-6 (+B) - Body ground Always 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- REPLACE MAP LIGHT ASSEMBLY
- Temporarily replace the map light assembly with a new or normally functioning one. Refer to REMOVAL .
- Clear the DTC. Refer to DTC CHECK / CLEAR .
NEXT: Go to next step
- CHECK FOR DTC
- Recheck for DTC. Refer to DTC CHECK / CLEAR
.RESULT
Result Proceed to DTC B2405 output does not reoccur A DTC B2405 output reoccurs B
B → REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)
A → END (MAP LIGHT ASSEMBLY IS DEFECTIVE)
- Recheck for DTC. Refer to DTC CHECK / CLEAR
.