Inspection Procedure

READ VALUE USING TECHSTREAM

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

Select the items below in the Data List and read the display on the Techstream.

Security

DTC DETECTION CONDITION CHART

Item	Measurement Item/Range	Normal Condition	Diagnostic Note
IG SW	Ignition switch ON signal ON/OFF	ON: Ignition switch is in ON OFF: Ignition switch is off	-

OK: When the ignition switch assembly is operated, the display changes as shown in the table .

NG: Go to step 2

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

CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK)

Disconnect the 2G instrument panel junction block connector.

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

Standard Voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
2G-1 - Body ground	Always	11 to 14 V

Fig 1: Identifying 2G Instrument Panel Junction Block Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR ALT FUSE

OK: Go to Next Step

INSPECT IGNITION SWITCH ASSEMBLY

Disconnect the E5 ignition switch assembly connector.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
E5-2 - E5-4	Ignition switch ON	Below 1 Ω

Result

RESULT REFERENCE

Result	Proceed to
OK	A
NG (2AZ-FE)	B
NG (2ZR-FE)	C

B: REPLACE IGNITION SWITCH ASSEMBLY (2AZ-FE) (See REMOVAL )

C: REPLACE IGNITION SWITCH ASSEMBLY (2ZR-FE) (See REMOVAL )

Fig 2: Identifying E5 Ignition Switch Assembly Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to Next Step

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B - INSTRUMENT PANEL J/B)

Reconnect the E5 ignition switch assembly connector.
Disconnect the 2F instrument panel junction block connector.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
2F-1 - 2F-3	Ignition switch ON	Below 1 Ω
2F-1 - 2F-3	Ignition switch off	10 kΩ or higher

Fig 3: Identifying 2F Instrument Panel Junction Block Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND)

Disconnect the 2J instrument panel junction block connector.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
2J-1 - Body ground	Always	Below 1 Ω

Fig 4: Identifying 2J Instrument Panel Junction Block Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK (IG SIGNAL))

Reconnect the 2G, 2F and 2J instrument panel junction block connectors.

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

Standard Voltage

VOLTAGE SPECIFICATION

Tester Connection	Switch Condition	Specified Condition
2S-7 - Body ground	Ignition switch ON	11 to 14 V

Fig 5: Identifying 2J Instrument Panel Junction Block Connector Terminal

NG: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK)

Disconnect the E72 theft warning ECU assembly and 2S instrument panel junction block connectors.

Fig 6: Identifying E72 Theft Warning ECU 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
E72-9 (IG) - 2S-7	Always	Below 1 Ω
E72-9 (IG) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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