Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

HINT.

When the power switch is OFF, the main body ECU may occasionally go into a non-active state called sleep mode Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the power switch OFF, open the driver door Then (with the power switch still OFF) open and close any door several times at 1 5 second intervals

INSPECT FUSE (STR LOCK)

Remove the STR LOCK fuse from the main body ECU

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
STR LOCK fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY)

Disconnect the L33 steering lock ECU connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L33-7 (B) - Body ground	Always	11 to 14 V

Fig 1: Checking Harness And Connector (Steering Lock ECU - Battery)

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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND)

Disconnect the L33 steering lock ECU connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L33-1 (GND) - Body ground	Always	Below 1 Ω
L33-2 (SGND) - Body ground	Always	Below 1 Ω

Fig 2: Checking Harness And Connector (Steering Lock ECU - Body Ground)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO STEERING LOCK SYSTEM (PROBLEM SYMPTOMS TABLE) (See PROBLEM SYMPTOMS TABLE )