STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: DESCRIPTION (2008 LX570)

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Last Modified: 11-27-2007		1.6 C
Service Category: Steering	Section: Steering Column
Model Year: 2008	Model: LX570	Doc ID: RM000000XZA01HX
Title: STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: DESCRIPTION (2008 LX570)

DTC

B2611

Telescopic Position Sensor or Telescopic Motor Circuit Malfunction

DESCRIPTION

The telescopic motor is operated by the power source voltage supplied from the multiplex tilt and telescopic ECU and slides the steering column forward and backward. The telescopic position sensor (Hall IC) in the telescopic motor detects the sliding position in the forward and backward directions of the steering column and outputs a signal to the multiplex tilt and telescopic ECU based on that sliding amount.

HINT:

Limit positions can be confirmed on the screen of the Techstream.

DTC Code	Detection Condition	Trouble Area
B2611	The telescopic operation stops within the operation range while operating.	Harness or connector Telescopic position sensor or telescopic motor Multiplex tilt and telescopic ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

The wire harness between the multiplex tilt and telescopic ECU and telescopic motor is provided with the steering column assembly.

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (TELESCO SHORT/LONG)

(a) Select the Active Test, use the Techstream to generate a control command, and then check that the steering column contracts and extends.

Tilt & Telescopic

Tester Display	Test Part	Control Range	Diagnostic Note
Telesco Operation	Telescopic operation	Long/Short	-

OK:

The steering column contracts (extends).

2.	CHECK TELESCOPIC MOTOR

(a) Disconnect connector A from the multiplex tilt and telescopic ECU.

(b) Apply 12 V battery voltage to the multiplex tilt and telescopic ECU connector. Then check the steering wheel telescopic operation.

OK

Measurement Condition

Specified Condition

12 V battery positive (+) lead → Terminal A-2 (TEM+)

12 V battery negative (-) lead → Terminal A-6 (TEM-)

The steering column contracts.

12 V battery positive (+) lead → Terminal A-6 (TEM-)

12 V battery negative (-) lead → Terminal A-2 (TEM+)

The steering column extends

3.	CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VCE TERMINAL VOLTAGE)

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A-3 (VCE) - A-5 (E2)	Engine switch on (IG)	8 to 16 V

4.	CHECK TELESCOPIC POSITION SENSOR

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A-4 (TES) - A-5 (E2)

Telescopic steering contracting or extending

Pulse generation

High: 8 to 16 V

Low: Below 1 V

5.	CHECK HARNESS AND CONNECTOR (ECU - TELESCOPIC POSITION SENSOR)

(a) Disconnect connector A from the multiplex tilt and telescopic ECU.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-3 (VCE) - Body ground	Always	10 kΩ or higher

6.	CHECK HARNESS AND CONNECTOR (ECU - BODY GROUND)

(a) Disconnect the E27 connector from the multiplex tilt and telescopic ECU.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E27-11 (GND) - Body ground	Always	Below 1 Ω