B2555

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION


B2555 STOP LAMP CIRCUIT


DIAGNOSIS DESCRIPTION
B2555 stop lamp system monitors the open circuit before the stop lamp switch (models without ICC system), which detects the brake pedal operation input to the Intelligent Key unit, or ICC brake relay (models with ICC system). If it detects the open circuit, it judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)

TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT INPUT






CONSULT-III DATA MONITOR STANDARD VALUE






SELF-DIAGNOSTIC LOGIC

SELF-DIAGNOSTIC LOGIC:

DIAGNOSTIC PROCEDURE
1.CHECK STOP LAMP SIGNAL
With CONSULT-III
Check ("STOP LAMP SW") in DATA MONITOR mode with CONSULT-III.

When depressing the break pedal
STOP LAMP SW : ON

Without CONSULT-III
Check voltage between Intelligent Key unit connector and ground.










OK or NG
OK - Check the condition of harness and connector, It is OK, check the self-diagnosis results using CONSULT-III again.
NG - Check the following.
- 10A fuse [No.20, located in the fuse block (J/B)]
- Harness for open or short between fuse block and Intelligent Key unit.