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 

   RESISTANCE SPECIFIED CONDITION
   
   

   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 

1. Disconnect the f28 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

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

   Fig 1: Identifying f28 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   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.

   Rear Console Switch 

   REAR CONSOLE SWITCH DATA LIST
   
   

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

   Result 

   RESULT CHART
   
   

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

A: REPLACE SEAT CLIMATE CONTROL ECU  (See DISASSEMBLY  )

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

C: Go to next step 

1. Remove the r3 curtain switch connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

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

   Fig 2: Identifying r3 Curtain Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 

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 

   RESISTANCE SPECIFIED CONDITION
   
   

   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

   Fig 3: Identifying r1 Power Seat Switch And r3 Curtain Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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