DESCRIPTION
When the reclining remote control lever sub-assembly is operated and the front seatback frame sub-assembly is folded forward, each limit switch is turned on and sends a signal to the position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat) according to the condition of the front seatback frame sub-assembly.
WIRING DIAGRAM
for Driver Seat
for Front Passenger Seat
CAUTION / NOTICE / HINT
Note
The front power seat control system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
PROCEDURE
CHECK FRONT POWER SEAT OPERATION
Check that each function of the power seat operates normally by using the front power seat switch (driver seat) or front power seat switch (front passenger seat).
| Result | ||||||
|---|---|---|---|---|---|---|
|
| B |
|
READ VALUE USING GTS (P SEAT BUCKLE SWITCH) Click here |
| A |
|
CHECK SEAT BELT TENSION REDUCER SYSTEM
Check the seat belt tension reducer system.
| OK |
|---|
| Seat belt tension reducer system is normal. |
| Result | |||
|---|---|---|---|
|
| NG |
|
GO TO SEAT BELT TENSION REDUCER SYSTEM Click here |
| OK |
|
CHECK FOR DTC
Perform "DTC Output Confirmation Operation" procedure.
Check for DTCs.
| OK |
|---|
| P0705-757 is not output. |
| Result | |||
|---|---|---|---|
|
| NG |
|
GO TO HYBRID CONTROL SYSTEM Click here |
| OK |
|
READ VALUE USING GTS (SHIFT SW POSITION)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Driver Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Shift SW Position | Park state signal | Shift P or Shift Other | Shift P: Shift lever in P Shift Other: Shift lever in a position other than P |
- |
| Tester Display |
|---|
| Shift SW Position |
| OK |
|---|
| The GTS display changes correctly in response to the shift lever position. |
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here |
| OK |
|
READ VALUE USING GTS (OPERATION LEVER STATE AND SLIDE FRONT OPERATION PERMITTED)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Driver Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Operation Lever State | Reclining remote control lever sub-assembly state | Lock or Unlock | Lock: Reclining remote control lever sub-assembly locked Unlock: Reclining remote control lever sub-assembly unlocked |
- |
| Slide Front Operation Permitted | Forward operation permission state | NO or YES | NO: Not permitted YES: Permitted |
- |
| Tester Display |
|---|
| Operation Lever State |
| Slide Front Operation Permitted |
| Result | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| A |
|
USE SIMULATION METHOD TO CHECK Click here |
| C |
|
INSPECT OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT)) Click here |
| D |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT)) Click here |
| B |
|
INSPECT INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT))
Remove the inner limit switch assembly (front seatback edge protector (driver seat)).
Inspect the inner limit switch assembly (front seatback edge protector (driver seat)).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT)) Click here |
| OK |
|
CHECK CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR DRIVER SEAT (DRIVER))
Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.
*1: for LHD
*2: for RHD
Disconnect the d4*1 or c3*2 inner limit switch assembly (front seatback edge protector (driver seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT))
Remove the outer limit switch assembly (front seatback edge protector (driver seat)).
Inspect the outer limit switch assembly (front seatback edge protector (driver seat)).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT)) Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT))
Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.
*1: for LHD
*2: for RHD
Disconnect the b10*1 or a9*2 outer limit switch assembly (front seatback edge protector (driver seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (DRIVER SEAT))
Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.
*1: for LHD
*2: for RHD
Disconnect the b10*1 or a9*2 outer limit switch assembly (front seatback edge protector (driver seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
|||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ VALUE USING GTS (P SEAT BUCKLE SWITCH)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Passenger Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| P Seat Buckle Switch | Front passenger seat belt buckle switch | ON or OFF | ON: Front passenger seat belt fastened OFF: Front passenger seat belt unfastened |
- |
| Tester Display |
|---|
| P Seat Buckle Switch |
| OK |
|---|
| On the GTS screen, ON or OFF is displayed accordingly. |
| Result | |||
|---|---|---|---|
|
| NG |
|
INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| OK |
|
READ VALUE USING GTS (OCCUPANT SENSOR)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Passenger Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Occupant Sensor | Occupant sensor condition | ON or OFF | ON: Occupant Sensor on OFF: Occupant Sensor off |
- |
| Tester Display |
|---|
| Occupant Sensor |
| OK |
|---|
| On the GTS screen, ON or OFF is displayed accordingly. |
| Result | |||
|---|---|---|---|
|
| NG |
|
INSPECT OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT)) Click here |
| OK |
|
CHECK FOR DTC
Perform "DTC Output Confirmation Operation" procedure.
Check for DTCs.
| OK |
|---|
| P0705-757 is not output. |
| Result | |||
|---|---|---|---|
|
| NG |
|
GO TO HYBRID CONTROL SYSTEM Click here |
| OK |
|
READ VALUE USING GTS (SHIFT P POSITION STATE)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Passenger Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Shift SW Position | Park state signal | Shift P or Shift Other | Shift P: Shift lever in P Shift Other: Shift lever in a position other than P |
- |
| Tester Display |
|---|
| Shift SW Position |
| OK |
|---|
| The GTS display changes correctly in response to the shift lever position. |
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| OK |
|
READ VALUE USING GTS (OPERATION LEVER STATE AND SLIDE FRONT OPERATION PERMITTED)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Passenger Seat / Data List.
Read the Data List according to the display on the GTS.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Operation Lever State | Reclining remote control lever sub-assembly state | Lock or Unlock | Lock: Reclining remote control lever sub-assembly locked Unlock: Reclining remote control lever sub-assembly unlocked |
- |
| Slide Front Operation Permitted | Forward operation permission state | NO or YES | NO: Not permitted YES: Permitted |
- |
| Tester Display |
|---|
| Operation Lever State |
| Slide Front Operation Permitted |
| Result | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| A |
|
USE SIMULATION METHOD TO CHECK Click here |
| C |
|
INSPECT OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT)) Click here |
| D |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT)) Click here |
| B |
|
INSPECT INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT))
Remove the inner limit switch assembly (front seatback edge protector (front passenger seat)).
Inspect the inner limit switch assembly (front seatback edge protector (front passenger seat)).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT)) Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - INNER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT))
Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Disconnect the c3*1 or d4*2 inner limit switch assembly (front seatback edge protector (front passenger seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT))
Remove the outer limit switch assembly (front seatback edge protector).
Inspect the outer limit switch assembly (front seatback edge protector).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR) Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT))
Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Disconnect the a9*1 or b10*2 outer limit switch assembly (front seatback edge protector (front passenger seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - OUTER LIMIT SWITCH ASSEMBLY (FRONT SEATBACK EDGE PROTECTOR (FRONT PASSENGER SEAT))
Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Disconnect the a9*1 or b10*2 outer limit switch assembly (front seatback edge protector (front passenger seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
|
|||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT))
Remove the occupant detection sensor (front seat cushion pad with cover (front passenger seat)).
Inspect the occupant detection sensor (front seat cushion pad with cover (front passenger seat)).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT)) Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT) - BODY GROUND)
Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Disconnect the T2*1 or U11*2 occupant detection sensor (front seat cushion pad with cover (front passenger seat)) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT)
Remove the front seat inner belt assembly (front passenger seat).
Inspect the front seat inner belt assembly (front passenger seat) (seat belt warning switch).
| Result | |||
|---|---|---|---|
|
| NG |
|
REPLACE FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| OK |
|
CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) - BODY GROUND)
Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Disconnect the T2*1 or U11*2 front seat inner belt assembly (front passenger seat) connector.
*1: for LHD
*2: for RHD
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||
|
| Result | |||
|---|---|---|---|
|
| OK |
|
REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |