Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Telescopic Position Sensor or Telescopic Motor Circuit Malfunction (B2611)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Suspension / Steering Column / Power Tilt And Power Telescopic Steering Column System / Telescopic Position Sensor or Telescopic Motor Circuit Malfunction (B2611)

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 of the steering column in the forward and backward directions and sends a signal to the multiplex tilt and telescopic ECU based on that sliding amount.

HINT:

Limit positions can be confirmed on the Techstream.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2611

Telescopic Position Sensor or Telescopic Motor Circuit Malfunction

Telescopic operation stops within the operation range while operating.
  • Telescopic position sensor or telescopic motor
  • Harness or connector
  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the electric power steering column sub-assembly (tilt steering gear assembly w/ motor) has been replaced, perform torque sensor zero point calibration.

Click here

HINT:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (TILT OPERATION)

(a) Turn the engine switch off.

*a

Extend

*b

Contract

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Check that the steering column contracts and extends.

(f) Enter the following menus: Body Electrical / Tilt & Telescopic / Active Test.

Body Electrical > Tilt&Telescopic > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Telesco Operation

Telesco Operation

LONG/SHORT

-
Body Electrical > Tilt&Telescopic > Active Test

Tester Display

Telesco Operation

OK:

The steering column contracts and extends.

NG

GO TO STEP 6

OK

2.

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TELESCOPIC POSITION SENSOR)

(a) Disconnect the J25 multiplex tilt and telescopic ECU connector.

(b) Disconnect the J69 telescopic motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J25-14 (VCE) - J69-4 (VCE)

Always

Below 1 Ω

J25-15 (TES) - J69-5 (TES)

Always

Below 1 Ω

J25-17 (E2) - J69-6 (E2)

Always

Below 1 Ω

J25-14 (VCE) or J69-4 (VCE) - Body ground

Always

10 kΩ or higher

J25-15 (TES) or J69-5 (TES) - Body ground

Always

10 kΩ or higher

J25-17 (E2) or J69-6 (E2) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the J25 multiplex tilt and telescopic ECU connector.

*a

Front view of wire harness connector

(to 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

J25-1 (GND) - Body ground

Always

Below 1 Ω

J25-8 (GND2) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VCE, TES TERMINAL VOLTAGE)

(a) Disconnect the J69 telescopic motor connector.

*a

Component with harness connected

(Multiplex Tilt and Telescopic ECU)

(b) Reconnect the J25 multiplex tilt and telescopic ECU connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J25-14 (VCE) - J25-17 (E2)

Engine switch on (IG)

8 to 14 V

J25-15 (TES) - J25-17 (E2)

Engine switch on (IG)

8 to 14 V
NG

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

OK

5.

CHECK TELESCOPIC POSITION SENSOR

(a) Reconnect the J25 multiplex tilt and telescopic ECU connector.

*a

Component with harness connected

(Telescopic Motor)

(b) Reconnect the J69 telescopic motor connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J69-5 (TES) - J69-6 (E2)

Steering column contracting or extending

Pulse generation

High: 8 to 14 V

Low: Below 1 V
OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY (TILT STEERING GEAR ASSEMBLY W/ MOTOR)

6.

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BATTERY)

(a) Disconnect the J25 multiplex tilt and telescopic ECU connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J25-2 (+B) - Body ground

Always

11 to 14 V

*a

Front view of wire harness connector

(to Multiplex Tilt and Telescopic ECU)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the J25 multiplex tilt and telescopic ECU connector.

*a

Front view of wire harness connector

(to 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

J25-1 (GND) - Body ground

Always

Below 1 Ω

J25-8 (GND2) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TELESCOPIC MOTOR)

(a) Disconnect the J25 multiplex tilt and telescopic ECU connector.

(b) Disconnect the J69 telescopic motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J25-6 (TEM+) - J69-2 (TEM+)

Always

Below 1 Ω

J25-19 (TEM-) - J69-1 (TEM-)

Always

Below 1 Ω

J25-6 (TEM+) or J69-2 (TEM+) - Body ground

Always

10 kΩ or higher

J25-19 (TEM-) or J69-1 (TEM-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

CHECK TELESCOPIC MOTOR

(a) Apply 12 V battery voltage to the telescopic motor connector. Then check the steering column telescopic operation.

OK:

Measurement Condition

Specified Condition
  • 12 V battery positive (+) lead → Terminal 2 (TEM+)
  • 12 V battery negative (-) lead → Terminal 1 (TEM-)

The steering column contracts.
  • 12 V battery positive (+) lead → Terminal 1 (TEM-)
  • 12 V battery negative (-) lead → Terminal 2 (TEM+)

The steering column extends.

*a

Component without harness connected

(Telescopic Motor)
OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY (TILT STEERING GEAR ASSEMBLY W/ MOTOR)

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