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

NOTE: If the steering lock actuator assembly (steering lock ECU) is replaced, with the power switch OFF and the shift lever on P, open and close the driver side door to record the current lock position into the steering lock ECU. If this is not performed, the hybrid control system may not start.

CHECK VEHICLE CONDITION

Check the problem symptom of the steering lock system

Result

RESULT CHART

Condition	Proceed to
Steering lock cannot be released	A
Steering lock cannot be locked	B

B: Go to step 5

A: Go to Next Step

READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (LOCK / UNLOCK RECEIVE)

Use the Data List to check if the steering lock command is functioning properly

Intelligent tester

SMART ACCESS

DIAGNOSTIC NOTE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
LCK/UNLCK REC	Steering lock command reception record / YES or NO	YES Steering lock/unlock signal received NO Steering lock/unlock signal not received	-

Techstream

Smart Access

DIAGNOSTIC NOTE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Lock / Unlock Receive	Steering lock command reception record / YES or NO	YES Steering lock/unlock signal received NO Steering lock/unlock signal not received	-

OK: YES is displayed on the tester screen.

NG: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (HOW TO PROCEED WITH TROUBLESHOOTING) (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: Go to Next Step

INSPECT STEERING LOCK ECU

Immediately after turning the power switch ON (IG), measure the voltage between terminals L33-3 (IGE) and L33-1 (GND) of the steering lock ECU

Result

RESULT CHART

Result	Proceed to
11 to 14 V (measured voltage never becomes below 1 V)	A
Below 1 V	B

B: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (PROBLEM SYMPTOMS TABLE) (See PROBLEM SYMPTOMS TABLE )

Fig 1: Inspecting Steering Lock ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to Next Step

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

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the L33 steering lock ECU connector.
Disconnect the L13 main body 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
L33-3 (IGE) - L13-19 (SLR+)	Always	Below 1 Ω
L33-3 (IGE) or L13-19 (SLR+) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

INSPECT STEERING LOCK ECU

Shift the shift lever to the P position
Turn the power switch OFF
Open the driver side door.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L33-3 (IGE) - L33-1 (GND)	Steering lock motor is operating	Below 1 V
L33-3 (IGE) - L33-1 (GND)	Steering lock motor is not operating	11 to 14 V

NG: Go to step 6

Fig 3: Inspecting Steering Lock ECU

OK: GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (PROBLEM SYMPTOMS TABLE) (See PROBLEM SYMPTOMS TABLE )

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

Fig 4: Checking Harness And Connector (Steering Lock ECU - Main Body ECU)

Disconnect the L33 steering lock ECU connector
Disconnect the L13 main body 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
L33-3 (IGE) - L13-19 (SLR+)	Always	Below 1 Ω
L33-3 (IGE) or L13-19 (SLR+) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU