Inspection Procedure

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

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