Inspection Procedure

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream main switch on.

Select the item below in the Active Test and then check that the indicator operates.

Security

CONTROL RANGE REFERENCE

Tester Display	Test Part	Control Range	Diagnostic Note
Security Indicator	Security indicator	ON/OFF	-

OK: The security indicator light flashes or goes off correctly when operating it through the Techstream .

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

CHECK HARNESS AND CONNECTOR (THEFT DETERRENT ECU ASSEMBLY - SECURITY INDICATOR LIGHT)

Disconnect the E72 theft warning ECU assembly and E60 Security Indicator light assembly connectors.

Fig 1: Identifying E72 Theft Warning ECU Assembly And E60 Security Indicator Light Assembly Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value (s) in the table below.

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
E72-29 (IND) - E60-1 (LP)	Always	Below 1 Ω
E72-29 (IND) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT ASSEMBLY - BODY GROUND)

Measure the resistance according to the value (s) in the table below.

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
E60-2 (E) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Security Indicator Light Assembly - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

INSPECT SECURITY INDICATOR LIGHT ASSEMBLY (TELLTALE LIGHT ASSEMBLY)

Remove the security indicator light assembly (See SECURITY INDICATOR LIGHT ASSEMBLY ).
Reconnect the E60 security indicator light assembly and E72 theft warning ECU assembly connectors.

Apply battery voltage from the wire harness back side between the specified terminals of the indicator, and check the lighting condition of the security indicator light assembly.

Standard

STANDARD SPECIFICATION

Measurement Condition	Specified Condition
Battery positive (+) → Terminal E60-1 (LP) Battery negative (-) → Terminal E60-2 (E)	Security indicator light assembly comes on

NOTE:

If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator light assembly will not come on.
Voltage of more than 12 V will damage the security indicator light assembly.
If the voltage is too low, the security indicator light assembly will not come on.

NG: REPLACE SECURITY INDICATOR LIGHT ASSEMBLY (TELLTALE LIGHT ASSEMBLY) (See SECURITY INDICATOR LIGHT ASSEMBLY )

Fig 3: Identifying Security Indicator Light Assembly Connector Terminal

OK: REPLACE THEFT WARNING ECU ASSEMBLY (See THEFT WARNING ECU )