Inspection Procedure

1. Remove the RR-IG-3 fuse from the luggage room junction block.
2. Remove the D RR S/HTR fuse from main body ECU.
3. Measure the resistance of the fuses.

   Standard resistance 

   FUSE (RR-IG-3, D RR S/HTR)
   
   

   Tester Connector	Condition	Specified Condition
   RR-IG-3 fuse	Always	Below 1 Ω
   D RR S/HTR fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

Fig 1: Identifying f28 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the f28 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND RESISTANCE
   
   

   Tester Connector	Condition	Specified Condition
   f28-12 (GND) - Body ground	Always	Below 1 Ω

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

   Standard voltage 

   SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND VOLTAGE
   
   

   Tester Connector	Switch Condition	Specified Condition
   f28-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   f28-2 (SYSB) - Body ground	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Check the DATA LIST for proper functioning of the rear power seat module switch.
   1. Intelligent tester

      REAR CONSOLE SWITCH 

      INTELLIGENT TESTER - REAR CONSOLE SWITCH REFERENCE
      
      

      Item	Measurement Item/Range	Normal Condition	Diagnostic Note
      RL A/C MAIN SW	Rear left seat A/C main switch condition/ON or OFF	ON: Switch ON OFF: Switch OFF	-

   2. Techstream

      Rear Console Switch 

      TECHSTREAM - REAR CONSOLE SWITCH REFERENCE
      
      

      Item	Measurement Item/Range	Normal Condition	Diagnostic Note
      RL Seat A/C Main Switch	Rear left seat A/C main switch condition/ON or OFF	ON: Switch ON OFF: Switch OFF	-

      OK : 

      On tester screen, each item changes between ON and OFF according to above chart. 

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      OK	A
      NG (w/Ottoman)	B
      NG (w/o Ottoman)	C

A: REPLACE SEAT CLIMATE CONTROL ECU (See  REMOVAL  ) 

B: REPLACE REAR POWER SEAT MODULE SWITCH (See  REMOVAL  ) 

C: GO TO NEXT STEP 

Fig 2: Identifying Curtain Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the r3 curtain switch connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   CURTAIN SWITCH ASSEMBLY
   
   

   Tester Connector	Switch Condition	Specified Condition
   18 (SW2) - 5 (SWE1)	Rear left seat A/C switch ON	Below 1.5 V

   HINT:

   As the circuit has a diode, perform the measurement with the tester in diode mode.

NG: REPLACE CURTAIN SWITCH ASSEMBLY (See  REMOVAL  ) 

OK: GO TO NEXT STEP 

Fig 3: Identifying r1 And r3 Connectors Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the r1 power seat switch connector.
2. Disconnect the r3 curtain switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   REAR POWER SEAT MODULE SWITCH CURTAIN SWITCH AND BODY GROUND
   
   

   Tester Connector	Condition	Specified Condition
   r1-7 (SW2) - r3-18 (SW2)	Always	Below 1 Ω
   r1-17 (SWE1) - r3-5 (SWE1)	Always	Below 1 Ω
   r1-7 (SW2) - Body ground	Always	10 kΩ or higher
   r1-17 (SWE1) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE REAR POWER SEAT MODULE SWITCH (See  REMOVAL  )