Front Power Seat Control System (Diagnostic Codes & Symptom Tests): Overview Lexus LX J200 рестайлинг

DESCRIPTION

When the front power seat switch does not receive a sensor signal despite forward or backward movement of the seat by power seat motor operation, this DTC is stored.

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1. PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR FUNCTION) 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 [01/2012 - ]»(ref-604000-S16508846852014031100000) . DRIVER SEAT Tester Display Test Part Control Range Diagnostic Note Seat Slide Operation Seat sliding operation Front / OFF / Rear - OK Motor operates normally. NG --> See step 5 OK: Go to next step
2. CHECK FRONT POWER SEAT SWITCH LH (SLIDE MOTOR CIRCUIT) Disconnect the c51 slide motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c51-2 (O/P) - c51-6 (GND) Sliding switch on 4.8 to 5.1 V NG --> See step 4 OK: Go to next step
3. CHECK FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH (SLIDE MOTOR) Connect the c51 slide motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c51-2 (O/P) - Body ground Sliding switch on 4.5 to 4.8 V NG --> See step 7 OK --> See step 8
4. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - SLIDE MOTOR) Disconnect the c50 front power seat switch connector. Disconnect the c51 slide motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition c50-2 (SSRS) - c51-2 (O/P) Always Below 1 ohms c50-1 (SGND) - c51-6 (GND) Always Below 1 ohms c50-3 (PVCC) - c51-5 (VCC) Always Below 1 ohms c50-1 (SGND) - Body ground Always 10 kohms or higher c50-2 (SSRS) - Body ground Always 10 kohms or higher c50-3 (PVCC) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
5. INSPECT FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH (SLIDE MOTOR) Remove the front seat with adjuster frame assembly LH (slide motor). Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000) . Check if the seat cushion spring moves smoothly when the battery is connected to the slide motor connector terminals. OK Measurement Condition Specified Condition Battery positive (+) --> 3 (FWD) Battery negative (-) --> 4 (BACK) Seat cushion spring moves forward Battery positive (+) --> 4 (BACK) Battery negative (-) --> 3 (FWD) Seat cushion spring moves backward NG --> See step 7 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - SLIDE MOTOR) Disconnect the c49 front power seat switch connector. Disconnect the c51 slide motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition c49-2 (SLD+) - c51-3 (FWD) Always Below 1 ohms c49-4 (SLD-) - c51-4 (BACK) Always Below 1 ohms c49-2 (SLD+) - Body ground Always 10 kohms or higher c49-4 (SLD-) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
7. REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000)
8. REPLACE FRONT POWER SEAT SWITCH LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000)

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.

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1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604000-S06668241782014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604000-S06668241782014031100000) . OK DTC B2658 is not output. NG --> See step 2 OK --> See step 5
2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - SLIDE MOTOR) Disconnect the c50 front power seat switch connector. Disconnect the c51 slide motor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition c50-3 (PVCC) - c51-5 (VCC) Always Below 1 ohms c50-2 (SSRS) - c51-2 (O/P) Always Below 1 ohms c50-1 (SGND) - c51-6 (GND) Always Below 1 ohms c50-3 (PVCC) - Body ground Always 10 kohms or higher c50-2 (SSRS) - Body ground Always 10 kohms or higher c50-1 (SGND) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK FRONT POWER SEAT SWITCH LH (SLIDE MOTOR CIRCUIT) Disconnect the c51 slide motor connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition c51-5 (VCC) - c51-6 (GND) Sliding switch on 5.5 to 6.5 V NG --> See step 7 OK: Go to next step
4. CHECK FRONT POWER SEAT SWITCH LH Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604000-S06668241782014031100000) . Temporarily replace the front power seat switch LH with a new or normally functioning one. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604000-S06668241782014031100000) . OK DTC B2658 is not output. NG --> See step 6 OK --> END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE)
5. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [01/2012 - ]»(ref-603789-S02048416482014031100000)
6. REPLACE FRONT SEAT WITH ADJUSTER FRAME ASSEMBLY LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000)
7. REPLACE FRONT POWER SEAT SWITCH LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000)

When a signal is input into the front power seat switch, the ECU receives manages the signals operates each motor. When 2 or more signals are input, the motors only operate when the signals are from the slide switch and reclining switch.

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When the front power seat switch is operated, a command signal is sent to the power seat switch. The power seat switch then controls the appropriate seat motor as needed. The power seat switch is designed so that a malfunction of the seat memory system will not interfere with manual seat control.

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When the seat memory SET switch and a seat memory switch (seat memory switch 1, seat memory switch 2 or seat memory switch 3) are pressed simultaneously, the outer mirror control ECU commands the front power seat switch through CAN communication to record each position value.

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With the engine switch off and the driver door closed, press the transmitter lock or unlock switch while holding a seat memory switch (seat memory switch 1, seat memory switch 2 or seat memory switch 3). Doing so will register the transmitter recognition code into the seat memory switch that was pressed. After the registration is complete, the answer-back buzzer sounds.

When a door is unlocked, the certification ECU (smart key ECU assembly) sends a door unlock signal and key ID signal to the front power seat switch. When the front power seat switch receives the door unlock signal, it stores the key ID. When the driver door is opened, the memory call and memory command information of the stored key ID is sent to each driving position related control ECU. Each control ECU receives the memory commands and performs the memory call operation according to predetermined control timing values.

When the engine switch is off and the shift lever is in P, the power seat slides rearwards when the seat belt tongue plate is disengaged from the front seat inner belt assembly LH (auto away function). Also the power seat slides forward when the seat belt tongue plate is engaged with the front seat inner belt assembly LH with the engine switch on (ACC) or on (IG), or the shift lever in P.

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1. CHECK FRONT POWER SEAT OPERATION Check that each function of the power seat operates normally by using the front power seat switch. Refer to «OPERATION CHECK [01/2012 - ]»(ref-604000-S07348752632014031100000) . OK Each function of power seat operates normally by using seat switches. NG --> See step 7 OK: Go to next step
2. READ VALUE USING TECHSTREAM (BUCKLE SWITCH) Using the Techstream, check the Data List for proper functioning of the seat buckle switch. DRIVER SEAT Tester Display Measurement Item/Range Normal Condition Diagnostic Note Driver Seat Buckle SW Status of the driver seat belt / ON or OFF ON: Tongue plate engaged OFF: Tongue plate not engaged - OK On tester screen, each item changes between ON and OFF according to above chart. NG --> See step 5 OK: Go to next step
3. REPLACE FRONT POWER SEAT SWITCH LH Replace the front power seat switch. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000) . NEXT: Go to next step
4. CHECK POWER SEAT POWER EASY ACCESS SYSTEM Check that the power seat power easy access system operates normally when engaging and disengaging the tongue plate of the seat belt with the shift lever in P. Refer to «OPERATION CHECK [01/2012 - ]»(ref-604000-S07348752632014031100000) . OK Power seat power easy access system is normal. NG --> REPLACE MAIN BODY ECU OK --> END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE)
5. INSPECT FRONT SEAT INNER BELT ASSEMBLY LH Remove the front seat inner belt assembly. Refer to «REMOVAL [01/2012 - ]»(ref-604041-S20613418852014031100000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 5 (RDC) - 4 (E) Seat belt fastened Below 1 ohms 5 (RDC) - 4 (E) Seat belt unfastened 10 kohms or higher NG --> See step 8 OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT SEAT INNER BELT AND BODY GROUND) Disconnect the c50 front power seat switch connector. Disconnect the c22*1 or c46*2 front seat inner belt connector. *1: w/ Climate Control Seat System *2: w/o Climate Control Seat System Measure the resistance according to the value(s) in the table below. Standard Resistance W/ CLIMATE CONTROL SEAT SYSTEM Tester Connection Condition Specified Condition c50-4 (DBCL) - c22-5 (RDC) Always Below 1 ohms c22-4 (E) - Body ground Always Below 1 ohms W/O CLIMATE CONTROL SEAT SYSTEM Tester Connection Condition Specified Condition c50-4 (DBCL) - c46-5 (RDC) Always Below 1 ohms c46-4 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
7. GO TO PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [01/2012 - ]»(ref-604000-S30074974402014031100000)
8. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to «REMOVAL [01/2012 - ]»(ref-604041-S20613418852014031100000)
9. REPLACE FRONT POWER SEAT SWITCH LH. Refer to «DISASSEMBLY [01/2012 - ]»(ref-603944-S05709036322014031100000)