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cic02262


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DI-250
                                                   DIAGNOSTICS       -   ABS WITH EBD & BA & TRAC & VSC SYSTEM
                                                                                                                       DI6BI-03




  DTC           C0226 / 21 - C0256 / 24                 ABS Solenoid Circuit

CIRCUIT DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel
cylinders thus controlling the braking force.
    DTC No.                        DTC Detecting Condition                                              Trouble Area
                  Open or short circuit in SFRH or SFRR circuit continues for   S Hydraulic brake booster
   C0226 / 21
                  0.015 sec. or more.                                           S SFRH or SFRR circuit

                  Open or short circuit in SFLH or SFLR circuit continues for   S Hydraulic brake booster
   C0236 / 22
                  0.015 sec. or more.                                           S SFLH or SFLR circuit

                  Open or short circuit in SRRH or SRRR circuit continues for   S Hydraulic brake booster
   C0246 / 23
                  0.015 sec. or more.                                           S SRRH or SRRR circuit
                  Open or short circuit in SRLH or SRLR circuit continues for   S Hydraulic brake booster
   C0256 / 24
                  0.015 sec. or more.                                           S SRLH or SRLR circuit




2002 4RUNNER (RM887U)

                                                                                  Author :                   Date :      426
                                                                                                               DI-251
                                            DIAGNOSTICS     -    ABS WITH EBD & BA & TRAC & VSC SYSTEM

WIRING DIAGRAM
                                                                                                      Skid Control ECU
                                                                                                       1
                                                                     R-B
                                                                                                      V16 R1+
                                           VSC R/B                                                    19
                ABS SOL Relay                                        G-B
                                                                                                      V16 SR
                                                   Short                  Hydraulic
        5           R+    SR       5                                      Brake Booster
                4              6                   Connector
                                                 5        5              4 BS         2       8
                                           R-B                      R-B                  G-Y
        5           +BS BS         5             S5       S6            V10          V12     V16 SRRH
                1              3                                              SRRH 4          4
                                                                                          L
                                                                                     V12     V17 SRLH
    B           Engine Room R/B                                               SRLH
                                                                                      8       21
                         ABS                                                             L-B
                                                                                     V12     V16 SFLH
            2                          2                                      SFLH 10         6
                     2         1                                                         G
                                                                                     V12     V17 SFRH
                                                 1               1            SFRH
                                                                                      1
                                                                      Y
                                                 S5             S6                   V12
                                                                 3            SRRR
                                                 3                                    7
                                                                     R
                                                 S5             S6                   V12
                                                                              SFLR
                                                 4              4                     3
                W                                                  Y-R
                                                 S5             S6                   V12
                                                                              SRLR
                                                 7               7                    9
                                                                   LG
                                                 S5             S6                   V12
                                                                              SFRR

                                                                                                       9
                                                      LG
                                                                                                      V16   SRRR
                                                                                                       7
                                                      Y-R
                                                                                                      V16   SFLR
                    Battery                                                                            3
                                                      R
                                                                                                      V17   SRLR
                                                                                                       5
                                                       Y
                                                                                                      V17   SFRR

                                                                                                                   F14339




2002 4RUNNER (RM887U)

                                                                       Author :              Date :                427
DI-252
                                             DIAGNOSTICS   -   ABS WITH EBD & BA & TRAC & VSC SYSTEM

INSPECTION PROCEDURE

   1      Check hydraulic brake booster solenoid.

                                   V12
                                                  PREPARATION:
                                         2        Disconnect the 2 connectors (V10, V12) from the hydraulic
                               3             1
   LOCK                    4                      brake booster.
                                                  CHECK:
                V10
                                                  Check continuity between each of the terminals V10 - 4 and
                                             7    V12 - 1, 2, 3, 4, 7, 8, 9 and 10 of hydraulic brake booster con-
                          10 9               8    nector.
                                                  OK:
            4
                                         F02855         Continuity
                                                  HINT:
                                                  Resistance of each solenoid at 20 



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