Toyota Tundra Service Manual: Telescopic Position Sensor or Telescopic Motor Circuit Malfunction (B2611)

Toyota Tundra Service Manual / Steering / Steering Column / Power Tilt And Power Telescopic Steering Column System / Telescopic Position Sensor or Telescopic Motor Circuit Malfunction (B2611)

DESCRIPTION

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

DTC Code

Detection Condition

Trouble Area

B2611

Telescopic operation stops within the operation range while operating.

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

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

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (TELESCO OPERATION)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(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

-

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 (STEERING COLUMN ASSEMBLY))

(a) Disconnect the J174 multiplex tilt and telescopic ECU connector.

(b) Disconnect the J175 telescopic 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

J174-14 (VCE) - J175-5 (VCE)

Always

Below 1 Ω

J174-15 (TES) - J175-4 (TES)

Always

Below 1 Ω

J174-17 (E2) - J175-3 (E2)

Always

Below 1 Ω

J174-14 (VCE) or J175-5 (VCE) - Body ground

Always

10 kΩ or higher

J174-15 (TES) or J175-4 (TES) - Body ground

Always

10 kΩ or higher

J174-17 (E2) or J175-3 (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 J174 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

J174-1 (GND) - Body ground

Always

Below 1 Ω

J174-8 (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 J175 telescopic motor (steering column assembly) connector.

*a

Component with harness connected

(Multiplex Tilt and Telescopic ECU)

(b) Reconnect the J174 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

J174-14 (VCE) - J174-17 (E2)

Ignition switch ON

8 to 14 V

J174-15 (TES) - J174-17 (E2)

Ignition switch ON

8 to 14 V

NG

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

OK

5.

CHECK TELESCOPIC POSITION SENSOR (STEERING COLUMN ASSEMBLY)

(a) Reconnect the J174 multiplex tilt and telescopic ECU connector.

*a

Component with harness connected

(Telescopic Motor (Steering Column Assembly))

(b) Reconnect the J175 telescopic 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

J175-4 (TES) - J175-3 (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 STEERING COLUMN ASSEMBLY

6.

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

(a) Disconnect the J174 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

J174-2 (+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 J174 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

J174-1 (GND) - Body ground

Always

Below 1 Ω

J174-8 (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 (STEERING COLUMN ASSEMBLY))

(a) Disconnect the J174 multiplex tilt and telescopic ECU connector.

(b) Disconnect the J175 telescopic 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

J174-6 (TEM+) - J175-1 (TEM+)

Always

Below 1 Ω

J174-19 (TEM-) - J175-2 (TEM-)

Always

Below 1 Ω

J174-6 (TEM+) or J175-1 (TEM+) - Body ground

Always

10 kΩ or higher

J174-19 (TEM-) or J175-2 (TEM-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

CHECK TELESCOPIC MOTOR (STEERING COLUMN ASSEMBLY)

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

OK:

Measurement Condition

Specified Condition

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

The steering column contracts.

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

The steering column extends.

*a

Component without harness connected

(Telescopic Motor (Steering Column Assembly))

OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE STEERING COLUMN ASSEMBLY

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