Lexus ES manuals

Lexus ES: Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range (B26031C)

Lexus ES (XZ10) Service Manual / Steering / Steering Column / Power Tilt And Power Telescopic Steering Column System (for Hv Model) / Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range (B26031C)

DESCRIPTION

Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should operate based on the voltage value.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B26031C

Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range

When operating the tilt and telescopic switch, an abnormal voltage value is sent to the multiplex tilt and telescopic ECU.

  • Tilt and telescopic switch
  • Harness or connector
  • Multiplex tilt and telescopic ECU

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM (TILT MANUAL SWITCH UP/DOWN, TELESCOPIC MANUAL SWITCH SHORT/LONG)

(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) Read the Data List according to the display on the Techstream.

Body Electrical > Tilt&Telescopic > Data List

Tester Display

Tilt Manual Switch Up

Tilt Manual Switch Down

Telescopic Manual Switch Short

Telescopic Manual Switch Long

Body Electrical > Tilt&Telescopic > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Tilt Manual Switch Up

Input state of tilt up switch

OFF or ON

-

-

Tilt Manual Switch Down

Input state of tilt down switch

OFF or ON

-

-

Telescopic Manual Switch Short

Input state of telescopic contract switch

OFF or ON

-

-

Telescopic Manual Switch Long

Input state of telescopic extend switch

OFF or ON

-

-

OK:

The value of each Data List item changes in accordance with the operation of the switch.

NG

GO TO STEP 3

OK

2.

CONFIRM DTC

(a) Clear the DTCs.

Body Electrical > Tilt&Telescopic > Clear DTCs

(b) Check for DTCs.

Body Electrical > Tilt&Telescopic > Trouble Codes

Result

Proceed to

DTCs are output.

A

DTCs are not output.

B

A

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

B

USE SIMULATION METHOD TO CHECK

3.

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

(a) Disconnect the G63 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G31 tilt and telescopic switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G63-5 (VC) - G31-1 (VC)

Always

Below 1 Ω

G63-18 (MSW) - G31-3 (MSW)

Always

Below 1 Ω

G63-5 (VC) or G31-1 (VC) - Body ground

Always

10 kΩ or higher

G63-18 (MSW) or G31-3 (MSW) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)

(a) Reconnect the G63 multiplex tilt and telescopic ECU connector.

*a

Component with harness connected

(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

G63-5 (VC) - G63-18 (MSW)

Power switch on (IG)

4.9 to 5.1 V

NG

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

OK

5.

INSPECT TILT AND TELESCOPIC SWITCH

(a) Remove the tilt and telescopic switch.

Click here

*a

Component without harness connected

(Tilt and Telescopic Switch)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G31-1 (VC) - G31-3 (MSW)

Tilt up

342 to 378 Ω

Tilt down

1890.5 to 2089.5 Ω

Telescopic contract

750.5 to 829.5 Ω

Telescopic extend

152 to 168 Ω

OK

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

NG

REPLACE TILT AND TELESCOPIC SWITCH

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