Inspection Procedure

HINT:

Check the condition of each related circuit connector before troubleshooting (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

1. INSPECT TRANSFER CONTROL SOLENOID ASSEMBLY 
   1. Disconnect the transfer transmission wire connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS
      
      

      Tester Connection	Condition
      E54-1 - E54-3	5.0 to 5.5 Ω
      E54-1 - Body ground	10 kΩ or higher
      E54-3 - Body ground	10 kΩ or higher

   Fig 1: Identifying E54 Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  3

   OK: Go to Next Step 

2. CHECK HARNESS AND CONNECTOR (TRANSFER TRANSMISSION WIRE TO 4WD CONTROL ECU) 
   1. Disconnect the 4WD control ECU connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS
      
      

      Tester Connection	Specified Condition
      A32-13 (SLC+) - E54-1 (BSF)	Below 1 Ω
      A32-32 (SLC-) - E54-3 (SLC)	Below 1 Ω
      A32-13 (SLC+) - Body ground	10 kΩ or higher
      A32-32 (SLC-) - Body ground	10 kΩ or higher

   3. Connect the transfer transmission wire connector and 4WD control ECU connector.
      Fig 2: Identifying E54 And A32 Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT DESCRIPTION
      
      

      Result	Proceed to
      OK	A
      OK (when troubleshooting in accordance with PROBLEM SYMPTOMS TABLE)	B
      NG	C

   B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

   C: REPAIR OR REPLACE HARNESS OR CONNECTOR (SLC+, SLC- CIRCUIT) 

   A: REPLACE 4WD CONTROL ECU 

3. INSPECT TRANSFER CONTROL SOLENOID ASSEMBLY 
   1. Remove the transfer control solenoid assembly (See REMOVAL  ).
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATIONS
      
      

      Tester Connection	Condition
      Terminal 1 - Terminal 2	5.0 to 5.5 Ω

   Fig 3: Inspecting Transfer Control Solenoid Assembly
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE TRANSFER CONTROL SOLENOID ASSEMBLY 

   OK: REPLACE TRANSFER TRANSMISSION WIRE