Diagnosis Circuit: Procedure

1. Check if a CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

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

B → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

A: Go to next step 

1. Turn the ignition switch off.
   Fig 1: Identifying Wire Harness (DLC3 - ECM) Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the connector from ECM.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for 2GR-FE 

   for 2AR-FE 

   Tester Connection	Condition	Specified Condition
   E10-13 (TC) - A55-27 (TC)	Always	Below 1 Ω

   Tester Connection	Condition	Specified Condition
   E10-13 (TC) - A24-7 (TC)	Always	Below 1 Ω

NG → REPAIR OR REPLACE WIRE HARNESS (TC OF DLC3 - TC OF ECM) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying DLC3 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E10-4 (CG) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE WIRE HARNESS (CG OF DLC3 - BODY GROUND) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying Wire Harness Connector End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   for 2GR-FE 

   for 2AR-FE 

   Tester Connection	Condition	Specified Condition
   A55-27 (TC) - Body ground	Always	1 MΩ or higher

   Tester Connection	Condition	Specified Condition
   A24-7 (TC) - Body ground	Always	1 MΩ or higher

NG → REPAIR OR REPLACE WIRE HARNESS OR EACH ECU 

OK → See step   5