B2553

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION


B2553 IGN POWER CIRCUIT


DIAGNOSIS DESCRIPTION
Though the power supply switching control to ON position by push-button ignition switch operation is performed normally, if there is no ON power supply input to the Intelligent Key unit, B2553 ignition power supply system judges it is the malfunction and displays the DTC (Diagnostic Trouble Code)

TERMINAL AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT






CONSULT-III DATA MONITOR STANDARD VALUE






SELF-DIAGNOSTIC LOGIC






DIAGNOSTIC PROCEDURE
1.CHECK POWER SUPPLY CIRCUIT
With CONSULT-III
Check ("IGN ON SW") in DATA MONITOR mode with CONSULT-III.

When ignition switch is turned to ON
IGN ON 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. If it is OK, check the self-diagnosis results using CONSULT-III again.
NG - Check Intelligent Key unit power supply circuit for open or short.