Inspection Procedure

1. Turn the ignition switch to ON.
2. Measure the voltage of the DLC3.

   Standard voltage: 10 to 14 V 

OK:  Go to step  3

NG: Go to next step 

Fig 1: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check for open and short circuit in harness and connector between terminal CG of DLC3 and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BODY GROUND) 

OK: Go to next step 

1. Check for open and short circuit in harness and connector between terminal TC of DLC3 and ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   NG REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU 

   OK: Go to next step 

   CHECK AND REPLACE ECM