Distance Control ECU Power Source Circuit: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - Distance Control ECU Power Source Circuit

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CHECK DISTANCE CONTROL ECU

Disconnect the distance control ECU connector.

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

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D2-1 (+B) - Body ground	Ignition switch on	10 to 14 V

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D2-10 (SGND) - Body ground	Always	Below 1 Ω
D2-12 (GND) - Body ground	Always	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Terminals Of Distance Control ECU

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