DTC    B2658    Short in Sensor with Motor Power Supply Circuit

for Preparation Click here


DESCRIPTION

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

DTC Code
DTC Detection Condition
Trouble Area
B2658
A problem with the voltage supplied to the position control sensor.
  1. Position control ECU and switch assembly
  2. Separate type front seat cushion spring assembly
  3. Separate type front seat back spring assembly
  4. Wire harness or connector

WIRING DIAGRAM


B270910E02


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2658 is not output.



NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (Click here)  

2.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)

  1. Disconnect the X5*1 or W4*2 position control ECU and switch assembly connector.

  1. Disconnect the X1*1 or W1*2 slide motor connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    X5-5 (SSRS) - X1-2
    		Always
    		Below 1 Ω
    X5-1 (SGND) - X1-3
    		Always
    		Below 1 Ω
    X5-5 (SSRS) - X5-1 (SGND)
    		Always
    		10 kΩ or higher
    X5-5 (SSRS) - Body ground
    		Always
    		10 kΩ or higher
    X5-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    W4-5 (SSRS) - W1-2
    		Always
    		Below 1 Ω
    W4-1 (SGND) - W1-3
    		Always
    		Below 1 Ω
    W4-5 (SSRS) - W4-1 (SGND)
    		Always
    		10 kΩ or higher
    W4-5 (SSRS) - Body ground
    		Always
    		10 kΩ or higher
    W4-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

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

    Standard Voltage:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    X1-2 - X1-3
    		Sliding switch on
    		4.8 to 5.1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    W1-2 - W1-3
    		Sliding switch on
    		4.8 to 5.1 V



NG
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH - FRONT VERTICAL MOTOR)

  1. Disconnect the X2*1 or W2*2 front vertical motor connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    X5-3 (SSFV) - X2-2
    		Always
    		Below 1 Ω
    X5-1 (SGND) - X2-3
    		Always
    		Below 1 Ω
    X5-3 (SSFV) - X5-1 (SGND)
    		Always
    		10 kΩ or higher
    X5-3 (SSFV) - Body ground
    		Always
    		10 kΩ or higher
    X5-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    W4-3 (SSFV) - W2-2
    		Always
    		Below 1 Ω
    W4-1 (SGND) - W2-3
    		Always
    		Below 1 Ω
    W4-3 (SSFV) - W4-1 (SGND)
    		Always
    		10 kΩ or higher
    W4-3 (SSFV) - Body ground
    		Always
    		10 kΩ or higher
    W4-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT VERTICAL MOTOR CIRCUIT)

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

    Standard Voltage:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    X2-2 - X2-3
    		Front vertical switch on
    		4.8 to 5.1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    W2-2 - W2-3
    		Front vertical switch on
    		4.8 to 5.1 V



NG
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - LIFTER MOTOR)

  1. Disconnect the X3*1 or W6*2 lifter motor connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    X5-4 (SSRL) - X3-2
    		Always
    		Below 1 Ω
    X5-1 (SGND) - X3-3
    		Always
    		Below 1 Ω
    X5-4 (SSRL) - X5-1 (SGND)
    		Always
    		10 kΩ or higher
    X5-4 (SSRL) - Body ground
    		Always
    		10 kΩ or higher
    X5-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    W4-4 (SSRL) - W6-2
    		Always
    		Below 1 Ω
    W4-1 (SGND) - W6-3
    		Always
    		Below 1 Ω
    W4-4 (SSRL) - W4-1 (SGND)
    		Always
    		10 kΩ or higher
    W4-4 (SSRL) - Body ground
    		Always
    		10 kΩ or higher
    W4-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (LIFTER MOTOR CIRCUIT)

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

    Standard Voltage:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    X3-2 - X3-3
    		Lifter switch on
    		4.8 to 5.1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    W6-2 - W6-3
    		Lifter switch on
    		4.8 to 5.1 V



NG
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (Click here)
OK


8.REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY

  1. Replace the separate type front seat cushion spring assembly (Click here).

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2658 is not output.



NG
Go to step 9
OK

END (SEPARATE TYPE FRONT SEAT CUSHION SPRING WAS DEFECTIVE) 

9.CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - RECLINING MOTOR)

  1. Disconnect the X5*1 or W4*2 position control ECU and switch assembly connector.

  1. Disconnect the Z1*1 or Y1*2 reclining motor connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    X5-11 (SSRR) - Z1-2
    		Always
    		Below 1 Ω
    X5-1 (SGND) - Z1-3
    		Always
    		Below 1 Ω
    X5-11 (SSRR) - X5-1 (SGND)
    		Always
    		10 kΩ or higher
    X5-11 (SSRR) - Body ground
    		Always
    		10 kΩ or higher
    X5-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    W4-11 (SSRR) - Y1-2
    		Always
    		Below 1 Ω
    W4-1 (SGND) - Y1-3
    		Always
    		Below 1 Ω
    W4-11 (SSRR) - W4-1 (SGND)
    		Always
    		10 kΩ or higher
    W4-11 (SSRR) - Body ground
    		Always
    		10 kΩ or higher
    W4-1 (SGND) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


10.CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (RECLINING MOTOR CIRCUIT)

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

    Standard Voltage:
    for LHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    Z1-2 - Z1-3
    		Reclining switch on
    		4.8 to 5.1 V
    for RHD 
    Tester Connection
    		Switch Condition
    		Specified Condition
    Y1-2 - Y1-3
    		Reclining switch on
    		4.8 to 5.1 V



NG
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (Click here)
OK


11.REPLACE SEPARATE TYPE FRONT SEAT BACK SPRING ASSEMBLY

  1. Replace the separate type front seat back spring assembly (Click here).

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2658 is not output.



NG
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (Click here)
OK

END (SEPARATE TYPE FRONT SEAT BACK SPRING ASSEMBLY WAS DEFECTIVE)