Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

ciigniti

VIEWS: 1 PAGES: 3

									                                                                                                           DI–779
                                       DIAGNOSTICS     –   BODY CONTROL SYSTEM
                                                                                                            DI7WA–04




 Ignition Switch Power Source Circuit

CIRCUIT DESCRIPTION
When the ignition switch is turned to the ON position, battery voltage is applied to terminal IG of the body
ECU.

WIRING DIAGRAM



                                     I14                                                        Body ECU
                                     Ignition SW
                                            ACC    3
                                                                                  J/B No. 1
                            W    2   AM1     1G 4                                 20
                                                                            Y–B
                                                                                  1L
          2
                                                                                  11
                                                                                  1G
      2
              AM1                                                                   ACC
      1                                                                           1
                     R/B No. 2                                          L–R
      1                                                                           1I
              ALT
      2                                                                                    10
                                                                                  ECU–IG
                                                                                  2
          2                                                          B–Y
                                                                                  1I
              W                                                                    8
                                                           W–B                             8
                                                                                  1J
                  Battery
                                       IG


                                                                                                             I21619




 2003 TOYOTA TACOMA (RM1002U)

                                                                 Author :              Date :               1041
DI–780
                                     DIAGNOSTICS   –   BODY CONTROL SYSTEM

INSPECTION PROCEDURE

   1     Check voltage between terminals 1I–2/1L–20 and 1J–8 of body ECU connector.

PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals 1I–2/1L–20 and 1J–8 of the body ECU connector.
OK:
      Voltage: 9 – 14 V

                                             OK        Proceed to next circuit inspection shown in
                                                       problem symptoms table (See page DI–773).


  NG



   2     Check ECU–IG and ACC fuses.

J/B No. 1                                  PREPARATION:
                                ACC
ECU–IG                          Fuse
                                           Remove the ECU–IG and ACC fuses from the J/B No. 1.
Fuse                                       CHECK:
                                           Check the continuity of the ECU–IG and ACC fuses.
                                           OK:
                                               Continuity




                                  I21973



                                             NG        Replace faulty fuse.


  OK




2003 TOYOTA TACOMA (RM1002U)

                                                              Author :        Date :             1042
                                                                                            DI–781
                                DIAGNOSTICS   –   BODY CONTROL SYSTEM



  3     Check ignition switch (See page BE–14).


                                       NG         Replace ignition switch.


  OK



  4     Check for harness and connector between body ECU and body ground (See
        page IN–28).


                                       NG         Repair or replace harness or connector.


  OK



 Check and repair harness or connector be-
 tween body ECU and battery
 (See page IN–28).




2003 TOYOTA TACOMA (RM1002U)

                                                        Author :             Date :          1043

								
To top