Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE OF HAND-HELD TESTER

Connect the hand-held tester to the DLC3.
Turn the ignition switch ON with the key that cannot start the engine.

On the hand-held tester, enter the following menus: DIAGNOSIS/ENHANCED OBD II/DATA LIST/IMMOBILIZER/KEY SW. Read the values.

Transponder key ECU assy:

TRANSPONDER KEY ECU ASSY

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
KEY SW	Unlock warning switch signal/ ON or OFF	OFF: No key is in ignition key cylinder ON: Key is in ignition key cylinder	-

OK: "ON" (key is in ignition key cylinder) appears on the screen.

NG: Go to step 2
OK: REPLACE TRANSPONDER KEY ECU ASSY

INSPECT UNLOCK WARNING SWITCH ASSY

Remove the switch.

Measure the resistance of the switch.

Standard:

TERMINAL SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
1 - 2	Pushed	Below 1 Ω
1 - 2	Not pushed	10 kΩ or higher

Fig 1: Identifying Unlock Warning Switch Assy Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE UNLOCK WARNING SWITCH ASSY
OK: Go to Next Step.

CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY - BODY GROUND)

Disconnect the U1 switch connector.

Fig 2: Disconnecting U1 Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the wire harness side connector.

Standard:

TERMINAL SPECIFIED CONDITION

Tester Connection	Specified Condition
U1-1 - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to Next Step.

CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - UNLOCK WARNING SWITCH ASSY)

Disconnect the U1 switch connector.

Measure the resistance of the wire harness side connectors.

Standard:

TERMINAL SPECIFIED CONDITION

Tester Connection	Specified Condition
T5-10 (KSW) - U1-2	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE TRANSPONDER KEY ECU ASSY