Inspection Procedure

HINT:

This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not cranked, proceed to the problem symptoms table on PROBLEM SYMPTOMS TABLE .

Hand-held tester: 

1. Connect hand-held tester, and check STA signal. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON and push the hand-held tester main switch ON.

   CHECK: 

   Read the STA signal on the hand-held tester while the starter operates.

   OK: 

   IGNITION SWITCH POSITION
   
   

   Ignition Switch Position	ON	START
   STA Signal	OFF	ON

   1. OK: Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
   2. NG: Go to next step. 
2. Check for open in harness and connector between ECM and starter relay (Marking: ST) (See  PROCEDURE  ). 
   1. NG: Repair or replace harness or connector. 
   2. OK: Check and replace ECM (See  PROCEDURE  ). 

OBD II scan tool (excluding hand-held tester): 

1. Check voltage between terminal STA of ECM connector and body ground. 

   PREPARATION: 

   Remove the glove compartment (See COMPONENTS ).

   CHECK: 

   Measure the voltage between terminal STA of the ECM connector and body ground during the engine cranking.

   Fig 1: Measuring Voltage Terminal STA Of ECM Connector & Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Voltage: 6 V or more 

   1. OK: Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
   2. NG: Go to next step. 
2. Check for open in harness and connector between ECM and starter relay (Marking: ST) (See  PROCEDURE  ). 
   1. NG: Repair or replace harness or connector. 
   2. OK: Check and replace ECM (See  PROCEDURE  ).