Inspection Procedure

HINT:

• Even though terminal TC is not connected with terminal CG, the MIL blinks.
• For the above phenomenon, an open or short in the wire harness, or malfunction inside the ECM is the likely cause.

1. Check voltage between terminals TC and CG of DLC3. 

   PREPARATION: 

   Turn the ignition switch ON.

   CHECK: 

   Measure the voltage between terminals TC and CG of the DLC3.

   OK: 

   1. Voltage: 9 to 14 V 
   Fig 1: Locating CG & TC Connector Terminal Of DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK : Check and replace ECM (See  PROCEDURE  ). 
   2. NG : Go to Next Step 
2. Check continuity between terminal CG of DLC3 and body ground. 
   1. NG : Repair or replace harness and connector. 
   2. OK : Go to Next Step 
3. Check for open and short circuit in harness and connector between ECM and DLC3, and DLC3 and body ground (See  PROCEDURE  ). 
   1. NG : Repair or replace harness adn connector. 
   2. OK : Check and replace ECM (See  PROCEDURE  ).