Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Short in Sensor with Motor Power Supply Circuit (B2658)

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Vehicle Interior / Seat / Front Power Seat Control System (w/ Memory) / Short in Sensor with Motor Power Supply Circuit (B2658)

DESCRIPTION

This DTC is stored when the slide motor is being operated (the slide motor position sensor is being supplied with power) and the power supply voltage does not rise to the specified value.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2658

Short in Sensor with Motor Power Supply Circuit

Slide motor position sensor power supply voltage is low
  • Position control ECU and switch assembly LH
  • Slide motor (Front seat adjuster assembly LH)
  • Wire harness or connector

WIRING DIAGRAM

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Driver Seat > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > Driver Seat > Trouble Codes

OK:

DTC B2658 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY LH - SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH))

(a) Disconnect the c6 position control ECU and switch assembly LH connector.

(b) Disconnect the c1 slide motor (front seat adjuster assembly LH) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

c6-5 (SSRS) - c1-2 (O/P)

Always

Below 1 Ω

c6-5 (SSRS) or c1-2 (O/P) - Body ground

Always

10 kΩ or higher

c6-1 (SGND) - c1-3 (GND)

Always

Below 1 Ω

c6-1 (SGND) or c1-3 (GND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY LH (SLIDE MOTOR CIRCUIT)

(a) Reconnect the c1 slide motor (front seat adjuster assembly LH) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

c1-2 (O/P) - c1-3 (GND)

Slide switch on

4.8 to 5.1 V
OK

REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH

NG

REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY LH

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