Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)

Disconnect the L1 sensor connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
L1-5 (IGB) - Body ground	Ignition switch on	10 to 14 V

Fig 1: Identifying L1 IGB Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 3

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (LASER SENSOR - ECM AND BODY GROUND)

Disconnect the L1 sensor connector.
Disconnect the E5 ECM connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
E5-31 (LGND) - L1-1 (LGND)	Always	Below 1 Ω
L1-1 (LGND) - Body ground	Always	10 kΩ or higher
L1-2 (SGND) - Body ground	Always	Below 1 Ω

Fig 2: Identifying L1 & E5 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

CHECK HARNESS AND CONNECTOR

Disconnect the L1 connector.
Disconnect the D2 ECU connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
L1-5 (IGB) - D2-13 (IGB)	Always	Below 1 Ω
D2-13 (IGB) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying L1 & D2 Connectors Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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