Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST BY TECHSTREAM (SECURITY INDICATOR LIGHT)

Select the ACTIVE TEST, use the Techstream to generate a command, and then check that the security indicator light operation is normal.

Transponder key ECU:

TRANSPONDER KEY ECU

Item	Normal Condition	Diagnostic Note
SECURITY INDIC	Security indicator light turns ON / OFF	-

OK: Security indicator light turns ON / OFF.

OK: Go to step 3

NG: GO TO NEXT STEP.

CHECK WIRE HARNESS (TRANSPONDER KEY ECU - SECURITY INDICATOR LIGHT)

Disconnect the E46 ECU connector.
Disconnect the E22*1 or E23*2 light connector.

Measure the resistance of the wire harness side connectors.

HINT:

*1: for Manual air conditioning system

*2: for Automatic air conditioning system

Fig 1: Identifying E46 ECU Connector And E22 Or E23 Light Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance:

for Manual Air Conditioning System

WIRE HARNESS (TRANSPONDER KEY ECU - SECURITY INDICATOR LIGHT) - MANUAL AIR CONDITIONING

Tester Connection	Specified Condition
E46-8 (IND) - E22-8 (SEC)	Below 1 Ω
E22-5 (GND) - Body ground	Below 1 Ω
E46-8 (IND) or E22-8 (SEC) - Body ground	10 kΩ or higher

for Automatic Air Conditioning System

WIRE HARNESS (TRANSPONDER KEY ECU - SECURITY INDICATOR LIGHT) - AUTOMATIC AIR CONDITIONING

Tester Connection	Specified Condition
E46-8 (IND) - E23-10 (LP)	Below 1 Ω
E23-7 (GND) - Body ground	Below 1 Ω
E46-8 (IND) or E23-10 (LP) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP.

INSPECT TRANSPONDER KEY ECU (OUTPUT)

Remove the transponder key ECU with its connectors still connected.

Measure the voltage of the ECU.

Fig 2: Inspecting Transponder Key ECU (Output)

Standard voltage

TRANSPONDER KEY ECU (OUTPUT)

Tester Condition	Condition	Specified Condition
E46-8 (IND) - Body ground	Engine immobilizer system is set	10 to 14 V and below 1 V output alternately

NG: REPLACE TRANSPONDER KEY ECU

OK: REPLACE CLOCK SUB-ASSEMBLY (for MANUAL AIR CONDITIONING SYSTEM), HEATER CONTROL PANEL (for AUTOMATIC AIR CONDITIONING SYSTEM)