Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OPEN IN CAN BUS WIRE (DISTANCE CONTROL ECU BRANCH WIRE)

Turn the ignition switch to the LOCK position.
Disconnect the distance control ECU connector (D2).

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

Standard resistance

RESISTANCE SPECIFICATION TABLE

Tester connection	Condition	Specified value
D2-8 (CANH) - D2-9 (CANL)	Ignition switch off	54 to 69 Ω

Fig 1: Identifying Distance Control ECU Connector Terminals

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NG: REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)

OK: Go to Next Step

CHECK WIRE HARNESS (B, GND)

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

Standard resistance

RESISTANCE SPECIFICATION TABLE

Tester connection	Condition	Specified value
D2-12 (GND) - Body ground	Always	Below 1 Ω

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

Standard voltage

VOLTAGE SPECIFICATION TABLE

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

Fig 2: Identifying Distance Control ECU Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE DISTANCE CONTROL ECU