Power Seat Power Easy Access System Function does not Operate [09/2014 - ]: Procedure

1. Check that each function of the power seat operates normally by using the front power seat switch (Refer to OPERATION CHECK [09/2014 - ] ).

   OK

   Each function of power seat operates normally by using seat switches.

   RESULT
   
   

   Result	Proceed to
   Power seat functions operate normally	A
   All power seat functions do not operate	B
   One or more power seat motors do not operate	C

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE (Front Power Seat does not Operate with Front Power Seat Switch) 

(Refer to Front Power Seat does not Operate with Front Power Seat Switch [09/2014 - ] )

Result: 

C 

GO TO PROBLEM SYMPTOMS TABLE (One or more Power Seat Motors do not Operate) 

(Refer to One or more Power Seat Motors do not Operate [09/2014 - ] )

Result: 

A 

See step  2

1. Perform a memory operation and check that the buzzer sounds to indicate the completion of the memory operation (Refer to OPERATION CHECK [09/2014 - ] ).
   NOTE:

   • The seat position will not be recorded if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
   • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

   OK

   Seat position memory function operates normally.

   RESULT
   
   

   Result	Proceed to
   OK (for Driver Side)	A
   OK (for Front Passenger Side)	B
   NG	C

Result: 

B 

See step  11

Result: 

C 

GO TO PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [09/2014 - ] )

Result: 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Driver Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   DRIVER SEAT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Driver Seat Buckle SW	Status of the driver's seat belt / ON or OFF	ON: Tongue plate is engaged OFF: Tongue plate is not engaged	-

   OK

   "ON" and "OFF" appears on the screen.

   RESULT
   
   

   Result	Proceed to
   OK (for Standard Seat Type)	A
   OK (for Sports Seat Type, Luxury Seat Type)	B
   NG	C

Result: 

B 

See step  6

Result: 

C 

See step  8

Result: 

A 

See step  4

1. Temporarily replace the power seat switch assembly with a new or normally functioning one (Refer to REMOVAL [09/2014 - ] ).

Result: 

NEXT 

See step  5

1. Check that the power seat 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 [09/2014 - ] ).

   OK

   Power seat power easy access system is normal.

Result: 

OK 

END (POWER SEAT SWITCH ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [09/2014 - ] )

1. Temporarily replace the position control ECU assembly with a new or normally functioning one.
   • for Sports Seat Type : (Refer to REMOVAL [09/2014 - ] )
   • for Luxury Seat Type : (Refer to REMOVAL [09/2014 - ] )

Result: 

NEXT 

See step  7

1. Check that the power seat 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 [09/2014 - ] ).

   OK

   Power seat power easy access system is normal.

Result: 

OK 

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [09/2014 - ] )

1. Remove the front seat inner belt assembly LH (Refer to REMOVAL [09/2014 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   5 (RDC) - 4 (E)	Tongue plate is engaged	Below 1 Ω
   5 (RDC) - 4 (E)	Tongue plate is not engaged	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   OK (for Standard Seat Type)	A
   OK (for Sports Seat Type, Luxury Seat Type)	B
   NG	C

Result: 

B 

See step  10

Result: 

C 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH 

(Refer to REMOVAL [09/2014 - ] )

Result: 

A 

See step  9

1. Disconnect the d16 power seat switch assembly connector.
2. Disconnect the d1 front seat inner belt assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   d16-10 (DBCL) - d1-5 (RDC)	Always	Below 1 Ω
   d1-4 (E) - Body ground	Always	Below 1 Ω
   d16-10 (DBCL) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE POWER SEAT SWITCH ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSEMBLY RH 

(Refer to REMOVAL [09/2014 - ] )

1. Disconnect the d5 position control ECU assembly connector.
2. Disconnect the d1 front seat inner belt assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   d5-13 (DBCL) - d1-5 (RDC)	Always	Below 1 Ω
   d1-4 (E) - Body ground	Always	Below 1 Ω
   d5-13 (DBCL) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   OK (for Sport Seat Type)	A
   OK (for Luxury Seat Type)	B
   NG	C

Result: 

A 

REPLACE POSITION CONTROL ECU ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )

Result: 

B 

REPLACE POSITION CONTROL ECU ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Door Courtesy	Front door courtesy light switch assembly RH signal / ON or OFF	ON: Front door RH closed OFF: Front door RH open	-

   OK

   "ON" and "OFF" appears on the screen.

Result: 

NG 

See step  15

Result: 

OK 

See step  12

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Passenger Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   PASSENGER SEAT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   P-Door Courtesy	Front door courtesy light switch assembly RH signal / ON or OFF	ON: Front door RH closed OFF: Front door RH open	-

   OK

   "ON" and "OFF" appears on the screen.

Result: 

NG 

See step  18

Result: 

OK 

See step  13

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Passenger Seat / Data List.
5. Read the Data List according to the display on the Techstream.
   PASSENGER SEAT
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed	Vehicle speed / Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Almost same as actual vehicle speed	-

   OK

   Almost same as actual vehicle speed

Result: 

NG 

See step  18

Result: 

OK 

See step  14

1. Temporarily replace the position control ECU assembly with a new or normally functioning one (Refer to REMOVAL [09/2014 - ] ).
2. Check that the power seat easy access system operates normally (Refer to OPERATION CHECK [09/2014 - ] ).

   OK

   Power seat power easy access system is normal.

Result: 

OK 

END (POSITION CONTROL ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [09/2014 - ] )

1. Remove the front door courtesy light switch RH (Refer to REMOVAL [09/2014 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - Switch body	Pin not pushed	Below 1 Ω
   	Pin pushed	10 kΩ or higher

Result: 

NG 

REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSEMBLY RH 

(Refer to REMOVAL [09/2014 - ] )

Result: 

OK 

See step  16

1. Disconnect the 5A cowl side junction block LH connector.
2. Disconnect the T6 front door courtesy light switch assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   5A-33 (FRCY) - T6-1	Always	Below 1 Ω
   5A-33 (FRCY) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  17

1. Remove the cowl side junction block LH (Refer to REMOVAL [09/2014 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-4 (FRCY) - 5A-33	Always	Below 1 Ω

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPLACE COWL SIDE JUNCTION BLOCK LH 

(Refer to REMOVAL [09/2014 - ] )

1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one (Refer to REMOVAL [09/2014 - ] ).
2. Check that the power seat easy access system operates normally (Refer to OPERATION CHECK [09/2014 - ] ).

   OK

   Power seat power easy access system is normal.

Result: 

OK 

END (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] WAS DEFECTIVE) 

Result: 

NG 

REPLACE POSITION CONTROL ECU ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )