Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure (B261096)

DESCRIPTION

The tilt motor (steering column assembly) 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 (steering column assembly) detects the tilt angle of the steering column assembly and sends a signal to the multiplex tilt and telescopic ECU based on that angle.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B261096

Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure

Tilt operation stops within the operation range while operating.

  • TI&TE Fuse
  • Tilt position sensor (steering column assembly)
  • Tilt motor (steering column assembly)
  • Harness or connector
  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (TILT MOTOR)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

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

(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

Tilt Motor

Body Electrical > Tilt&Telescopic > Active Test

Tester Display

Measurement Item

Control Range

Tilt Motor

Tilt operation

UP/DOWN

OK:

The steering wheel tilts up and down.

NG

GO TO STEP 6

OK

2.

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

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G49-13 (VCI) - G61-4 (VCI)

Always

Below 1 Ω

G49-16 (TIS) - G61-5 (TIS)

Always

Below 1 Ω

G49-4 (E1) -G61-6 (E1)

Always

Below 1 Ω

G49-13 (VCI) or G61-4 (VCI) - Body ground

Always

10 kΩ or higher

G49-16 (TIS) or G61-5 (TIS) - Body ground

Always

10 kΩ or higher

G49-4 (E1) or G61-6 (E1) - 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 G49 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

G49-1 (GND) - Body ground

Always

Below 1 Ω

G49-8 (GND2) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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

(a) Reconnect the G49 multiplex tilt and telescopic ECU connector.

*a

Component with harness connected

(Multiplex Tilt and Telescopic ECU)

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G49-13 (VCI) - G49-4 (E1)

Power switch on (IG)

8 to 14 V

G49-16 (TIS) - G49-4 (E1)

Power switch on (IG)

8 to 14 V

NG

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

OK

5.

CHECK TILT POSITION SENSOR (STEERING COLUMN ASSEMBLY)

(a) Reconnect the G49 multiplex tilt and telescopic ECU connector.

*a

Component with harness connected

(Tilt Motor (Steering Column Assembly))

(b) Reconnect the G61 tilt motor (steering column assembly) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G61-5 (TIS) - G61-6 (E1)

Steering wheel tilting up or tilting down

Pulse generation

High: 8 to 14 V

Low: Below 1 V

OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE STEERING COLUMN ASSEMBLY

6.

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

(a) Disconnect the G49 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

G49-2 (+B) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

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

(a) Disconnect the G49 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

G49-1 (GND) - Body ground

Always

Below 1 Ω

G49-8 (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 - TILT MOTOR (STEERING COLUMN ASSEMBLY))

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G49-7 (TIM+) - G61-1 (TIM+)

Always

Below 1 Ω

G49-20 (TIM-) - G61-2 (TIM-)

Always

Below 1 Ω

G49-7 (TIM+) or G61-1 (TIM+) - Body ground

Always

10 kΩ or higher

G49-20 (TIM-) or G61-2 (TIM-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

CHECK TILT MOTOR (STEERING COLUMN ASSEMBLY)

(a) Disconnect the G61 tilt motor (steering column assembly) connector.

*a

Component without harness connected

(Tilt Motor (Steering Column Assembly))

(b) Apply 12 V auxiliary battery voltage to the tilt motor (steering column assembly) connector. Then check the steering wheel tilt operation.

OK:

Measurement Condition

Specified Condition

  • 12 V auxiliary battery positive (+) lead → G61-1 (TIM+)
  • 12 V auxiliary battery negative (-) lead → G61-2 (TIM-)

The steering wheel tilts up.

  • 12 V auxiliary battery positive (+) lead → G61-2 (TIM-)
  • 12 V auxiliary battery negative (-) lead → G61-1 (TIM+)

The steering wheel tilts down.

OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE STEERING COLUMN ASSEMBLY

    ECU Power Source Circuit System Voltage Low (B2620A2)

    Customize Parameters

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