Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
The electric current flowing in the transistor inside the J/B is examined by the ECU.
When an excessive current is detected, DTC B2402 is output.
When overheating occurs prior to an excessive current, the ECU cuts off the current in the transistor to prevent it from being damaged and outputs DTC B2403.
Normally, turning off the ignition switch clears DTC.
However, if an excessive current is detected frequently (9 times or more), DTC may not be cleared.
When this happens, disconnect the negative (-) lead from the battery to clear DTC.
DTC SECTION CONDITION
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| B2402 | Malfunction of Luggage room J/B ECU | Luggage room J/B ECU |
| B2403 | Malfunction of Luggage room J/B ECU | Luggage room J/B ECU |
HINT:
When "B2403" is output, "B2402" is also output.