Inspection Procedure

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

CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)

Disconnect the A36 sensor connector.

Measure the voltage of the wire harness side connector.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
A36-5 (IGB) - Body ground	Ignition switch on (IG)	10 to 14 V

NG: Go to step 3

Fig 1: Identifying A36 And IGB Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

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

Disconnect the ECM A55 connector.

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A36-1 (LGND) - A55-38 (LGND)	Always	Below 1 Ω
A36-1 (LGND) - Body ground	Always	10 kΩ or higher
A36-2 (SGND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying A36 And A55 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

CHECK HARNESS AND CONNECTOR (LASER SENSOR - DISTANCE CONTROL ECU)

Disconnect the distance control ECU connector.

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A20-13 (IGB) - A36-5 (IGB)	Always	Below 1 Ω
A20-13 (IGB) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying A36 And A20 Connector Terminal

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