Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Tilt Position Sensor or Tilt Motor Circuit Malfunction (B2610)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Suspension / Steering Column / Power Tilt And Power Telescopic Steering Column System / Tilt Position Sensor or Tilt Motor Circuit Malfunction (B2610)

DESCRIPTION

The tilt motor is operated by the power source voltage supplied from the multiplex tilt and telescopic ECU and tilts the steering column up and down. The tilt position sensor (Hall IC) in the tilt motor detects the tilt angle of the steering column and sends a signal to the multiplex tilt and telescopic ECU based on that angle.

HINT:

Limit positions can be confirmed on the Techstream.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2610	Tilt Position Sensor or Tilt Motor Circuit Malfunction	Tilt operation stops within the operation range while operating.	Tilt position sensor or tilt 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	Up
*b	Down

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Check that the steering wheel tilts up and down.

(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
Tilt Operation	Tilt operation	UP/DOWN	-

Body Electrical > Tilt&Telescopic > Active Test

Tester Display
Tilt Operation

OK:

The steering wheel tilts up and down.

GO TO STEP 6

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

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

(b) Disconnect the J24 tilt motor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
J25-13 (VCI) - J24-4 (VCI)	Always	Below 1 Ω
J25-16 (TIS) - J24-5 (TIS)	Always	Below 1 Ω
J25-4 (E1) -J24-6 (E1)	Always	Below 1 Ω
J25-13 (VCI) or J24-4 (VCI) - Body ground	Always	10 kΩ or higher
J25-16 (TIS) or J24-5 (TIS) - Body ground	Always	10 kΩ or higher
J25-4 (E1) or J24-6 (E1) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VCI, TIS TERMINAL VOLTAGE)

(a) Disconnect the J24 tilt motor connector.

*a	Component with harness connected (Multiplex Tilt and Telescopic ECU)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
J25-13 (VCI) - J25-4 (E1)	Engine switch on (IG)	8 to 14 V
J25-16 (TIS) - J25-4 (E1)	Engine switch on (IG)	8 to 14 V

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

5.	CHECK TILT POSITION SENSOR

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

*a	Component with harness connected (Tilt Motor)

(b) Reconnect the J24 tilt motor connector.

Standard Voltage:

Tester Connection	Condition	Specified Condition
J24-5 (TIS) - J24-6 (E1)	Steering wheel tilting up or tilting down	Pulse generation High: 8 to 14 V Low: Below 1 V

Tester Connection

Condition

Specified Condition

J24-5 (TIS) - J24-6 (E1)

Steering wheel tilting up or tilting down

Pulse generation

High: 8 to 14 V

Low: Below 1 V

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

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.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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

(b) Disconnect the J24 tilt motor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
J25-7 (TIM+) - J24-2 (TIM+)	Always	Below 1 Ω
J25-20 (TIM-) - J24-1 (TIM-)	Always	Below 1 Ω
J25-7 (TIM+) or J24-2 (TIM+) - Body ground	Always	10 kΩ or higher
J25-20 (TIM-) or J24-1 (TIM-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.	CHECK TILT MOTOR

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

OK:

Measurement Condition	Specified Condition
12 V battery positive (+) lead → Terminal 1 (TIM-) 12 V battery negative (-) lead → Terminal 2 (TIM+)	The steering wheel tilts down.
12 V battery positive (+) lead → Terminal 2 (TIM+) 12 V battery negative (-) lead → Terminal 1 (TIM-)	The steering wheel tilts up.

*a	Component without harness connected (Tilt Motor)

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

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

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