Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CRUISE CONTROL ECU ASSEMBLY (IGB VOLTAGE)

Disconnect the A36 sensor connector.

Fig 1: Disconnecting A36 Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

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

NG: Go to step 3

OK: Go to Next Step

CHECK WIRE HARNESS (LASER RADAR SENSOR - HYBRID CONTROL ECU AND BODY GROUND)

Disconnect the ECM A24 connector.

Fig 2: Disconnecting ECM A24 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
A36-1 (LGND) - A24-31 (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

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

CHECK WIRE HARNESS (LASER RADAR SENSOR - DISTANCE CONTROL ECU)

Disconnect the cruise control ECU (distance control ECU) connector.

Fig 3: Disconnecting Cruise Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

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