Inspection Procedure

HINT:

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

1. CHECK CAN COMMUNICATION SYSTEM 
   1. Check if the CAN communication DTC is output (See DIAGNOSIS SYSTEM ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

   B: REPAIR CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

   A: Go to Next Step 

2. CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM AND BODY GROUND) 
   1. Turn the ignition switch off.
   2. Disconnect the ECM connector.
   3. Measure the resistance of the wire harness side connectors.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection (DLC3 - ECM)	Condition	Specified Condition
   D1-13 (TC) - A41-16 (TC)	Always	Below 1 Ω
   D1-13 (TC) - A49-7 (TC)	Always	Below 1 Ω
   D1-13 (TC) - Body Ground	Always	10 kΩ or higher

   Text in Illustration 

   ILLUSTRATION LEGEND
   
   

   *1	DLC3
   *2	Front view of wire harness connector (to ECM)
   *3	2GR-FE
   *4	1AR-FE

   Fig 1: Identifying TC Terminals Of DLC3 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

3. CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND) 
   1. Measure the resistance of the DLC3.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   D1-4 (CG) - Body ground	Always	Below 1 Ω

   Text in Illustration 

   ILLUSTRATION LEGEND
   
   

   *1

   DLC3

   Fig 2: Identifying CG Terminals Of DLC3 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

4. CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND) 
   1. Measure the resistance of the DLC3.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   D1-13 (TC) - Body ground	Always	Below 1 Ω

   Text in Illustration 

   ILLUSTRATION LEGEND
   
   

   *1

   DLC3

   Fig 3: Identifying TC Terminals Of DLC3 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE AWD CONTROL ECU  (See 4WD CONTROL ECU )