DTC B265D: Up / Down Lumbar Support Sensor Circuit [09/2015 - ]: Procedure
- CHECK FOR DTC
- DTC output area check
- Using the Techstream, determine the area that output the DTC (Refer to DTC CHECK / CLEAR [09/2015 - ]
).
OK
DTC B265D is not output.
- Using the Techstream, determine the area that output the DTC (Refer to DTC CHECK / CLEAR [09/2015 - ]
).
Result: OK
OK
USE SIMULATION METHOD TO CHECK
(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )
Result: NG
NG
See step 2
- DTC output area check
- PERFORM ACTIVE TEST USING TECHSTREAM (LUMBAR SLIDE)
- Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function (Refer to DATA LIST / ACTIVE TEST [09/2015 - ]
).DRIVER SEAT
Tester Display Test Part Control Range Diagnostic Note Lumbar Lift Lumbar lifting operation Up / OFF / Down - OK
Motor operates normally.
Result: NG
NG
See step 6
Result: OK
OK
See step 3
- Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function (Refer to DATA LIST / ACTIVE TEST [09/2015 - ]
).
- CHECK FRONT POWER SEAT SWITCH LH (POSITION CONTROL SENSOR)
- Disconnect the e76 motor connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
Tester Connection Switch Condition Specified Condition e76-2 (SMR) - e76-3 (GND) Lumbar switch ON 4.8 to 5.1 V
Result: NG
NG
See step 5
Result: OK
OK
See step 4
- Disconnect the e76 motor connector.
- CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR)
- Measure the voltage according to the value(s) in the table below.
Standard voltage
Tester Connection Switch Condition Specified Condition e76-2 (SMR) - Body ground Lumbar switch ON 4.5 to 4.8 V
Result: OK
OK
REPLACE FRONT POWER SEAT SWITCH LH
(Refer to DISASSEMBLY [09/2015 - ] )
Result: NG
NG
REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH
(Refer to REMOVAL [09/2015 - ] )
- Measure the voltage according to the value(s) in the table below.
- CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR)
- Disconnect the e46 switch connector.
- Disconnect the e76 motor connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition e46-7 (SSLV) - e76-2 (SMR) Always Below 1 Ω e46-18 (SGND) - e76-3 (GND) Always Below 1 Ω e46-7 (SSLV) - Body ground Always 10 kΩ or higher e46-18 (SGND) - Body ground Always 10 kΩ or higher
Result: OK
OK
REPLACE FRONT POWER SEAT SWITCH LH
(Refer to DISASSEMBLY [09/2015 - ] )
Result: NG
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Disconnect the e46 switch connector.
- CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (POWER SEAT MOTOR)
- Remove the lumbar support adjuster assembly LH (Refer to REMOVAL [09/2015 - ] ).
- Inspect the lumbar support adjuster assembly LH (Refer to INSPECTION [09/2015 - ] ).
Result: NG
NG
REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH
(Refer to REMOVAL [09/2015 - ] )
Result: OK
OK
See step 7
- CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR)
- Disconnect the e45 switch connector.
- Disconnect the e76 motor connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition e45-9 (LV+) - e76-5 (UP) Always Below 1 Ω e45-2 (LV-) - e76-6 (DOWN) Always Below 1 Ω e45-9 (LV+) - Body ground Always 10 kΩ or higher e45-2 (LV-) - Body ground Always 10 kΩ or higher
Result: OK
OK
REPLACE FRONT POWER SEAT SWITCH LH
(Refer to DISASSEMBLY [09/2015 - ] )
Result: NG
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Disconnect the e45 switch connector.