Inspection Procedure

INSPECT TRANSPONDER KEY ECU ASSEMBLY TERMINAL VOLTAGE

Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check the security indicator light function.

Transponder key ECU assembly:

SECURITY INDICATOR LIGHT

Item	Test Details	Diagnostic Note
SECURITY INDIC	Turn security indicator ON/OFF	-

Measure the voltage of the T19 ECU connector.

Standard voltage:

w/ Navigation system

T19 ECU CONNECTOR (W/NAVIGATION SYSTEM)

Tester Connection	Security Indicator Light Condition	Specified Condition
T19-3 (IND) - Body ground	ON	8 to 10 V
T19-3 (IND) - Body ground	OFF	Below 1 V

w/o Navigation system

T19 ECU CONNECTOR (W/O NAVIGATION SYSTEM)

Tester Connection	Security Indicator Light Condition	Specified Condition
T19-3 (IND) - Body ground	ON	3 to 6 V
T19-3 (IND) - Body ground	OFF	Below 1 V

Fig 1: Inspecting Transponder Key ECU Assembly Terminal Voltage

NG: Go to NAVIGATION SYSTEM (w/ NAVIGATION SYSTEM), MULTI-DISPLAY (w/o NAVIGATION SYSTEM)
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE