LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

This circuit detects the ignition switch state (ACC or off) and sends it to the main body ECU.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (IGNITION SWITCH)

   
   

   1. Using the intelligent tester, read the Data List (Click here).

      Table 1. Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      ACC SW	Ignition switch ACC signal / ON or OFF	ON: Ignition switch ACC OFF: Ignition switch off	-

      OK
      The display is as specified in the normal condition column.

   
   
   • OKClick here
   • NGClick here
2. Click here

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

3. Click here

   CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

   
   
   1. 

      Remove the main body ECU (Click here).

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition A-29 (ACC) - Body ground Ignition switch ACC 11 to 14 V

      Table 2. Text in Illustration

      *a	Front view of wire harness connector (to Main Body ECU)

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)Click here

5. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR