B2402

LIGHTING: LIGHTING SYSTEM: B2402: Transistor Relay Overload Malfunction

DTC B2402 - Transistor Relay Overload Malfunction

DTC B2403 - Transistor Relay Overhead Malfunction

DESCRIPTION

The electric current flowing in the transistor inside the junction block 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 cable from the negative (-) battery terminal to clear DTC.





HINT: When DTC B2403 is output, DTC B2402 is also output.

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (TRANSISTOR RELAY)
(a) Check the DATA LIST for proper functioning of the transistor relay.

Body No. 4





OK:
OK (transistor relay normal) appears on the screen.
OK -- MALFUNCTION MAY NOT BE PRESENT
NG -- Continue to next step.
2. CHECK WIRE HARNESS (LUGGAGE ROOM JUNCTION BLOCK ECU AND LIGHT IN WHICH ERROR IS DETECTED ABOVE STEP)
(a) Inspect each circuit in the table below.






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE LUGGAGE ROOM JUNCTION BLOCK (LUGGAGE ROOM JUNCTION BLOCK ECU)