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Diagnostics Procedure without Diagnostic Trouble Code (DTC)


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 DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)

12.Diagnostics Procedure without Diagnostic Trouble Code (DTC)
A: ABS WARNING LIGHT DOES NOT COME ON.
DIAGNOSIS:
ABS warning light circuit is open or shorted.
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), ABS warning light does not come on.
WIRING DIAGRAM:

                                                                                                                                            BATTERY
                                                SBF-3                                    SBF-1




                                                              SBF-4




                                                                      IGNITION
                                                                      SWITCH

                                                                                                                                                                          E
                                                                              No.14

                                                                                                                B36
                                                                                                      5
                                                                                                                i1
                                                             No.18




                                                                                                      B9




                                                                                                                          COMBINATION
                                                                                                                          METER
                                                                                      PARKING BRAKE
            No.8




                                                                                                            WARNING




                                                                                                                          A:    i12
                                                                                                            LIGHT
                                                                                      WARNING




                                                                                                                          B:    i10                            DIAGNOSIS
                                                                                                            ABS




                                                                                                                                                               TERMINAL
                                                                                      LIGHT




                                                                                                                          C:    i11
                                                                                                                                                    B82

                                                                                                                                                        6
                                                                               A7




                                                                                                           C6




                                                                                                                                                                    B81
                        F44
                   2




                                                                                         i3                          i1
                        B61
                                                                                                           23
                                                                               31




                                                                                       B38                        B36
                                                                                                                                                   23
                   24




                                                                               21




                                                                                                           22
                                                    1




                                                                                                                               4




                                            B301    ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT                                                                    E        E




                   C:   i11
                                                                            B36                                                                             B301


         1 2 3 4 5 6 7 8 9 10                               1 2 3 4 5            6 7 8 9 10 11                                           1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
                                                            12 13 14 15 16 17 18 19 20 21 22 23 24                                        16 17 18 19 20 21 22
                                                                                                                                                               23 24 25 26
                                                                                                                                         27 28 29 30 31


                        B:    i10                                        A:    i12                                                 B82                             B38

                                                                                                                                                1 2 3 4              5 6 7 8 9
       1 2 3 4 5 6 7              8 9 10 11 12 13 14                  1 2 3       4 5 6                                        1     2          10 11 12 13 14 15 16 17 18 19 20 21
       15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30                7 8 9 10 11 12 13 14                                     3 4 5 6          22 23 24 25 26 27 28 29 30 31 32


                                                                                                                                                                                      ABS00393




                                                                              ABS-30
DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
                                                                                                     ABS (DIAGNOSTICS)

                     Step                            Check                    Yes                               No
1   CHECK IF OTHER WARNING LIGHTS TURN Are other warning lights turned Go to step 2.                    Repair the combi-
    ON.                                          on?                                                    nation meter.
    Turn the ignition switch to ON (engine OFF).                                                        
2   CHECK ABS WARNING LIGHT BULB.                   Is the ABS warning light bulb   Replace the ABS     Go to step 3.
    1) Turn the ignition switch to OFF.             open?                           warning light bulb.
    2) Remove the combination meter.                                                
3   CHECK BATTERY SHORT OF ABS HAR-                 Is the voltage less than 3V?    Go to step 4.       Repair battery
    NESS.                                                                                               short in the warn-
    1) Disconnect the connector (i1) from connec-                                                       ing light harness.
    tor (B36).
    2) Measure the voltage between connector
    (i1) and chassis ground.
      Connector & terminal
        (i1) No. 23 (+) -- Chassis ground (-):
4   CHECK BATTERY SHORT OF ABS HAR-                 Is the voltage less than 3V?    Go to step 5.       Repair battery
    NESS.                                                                                               short in the warn-
    1) Turn the ignition switch to ON.                                                                  ing light harness.
    2) Measure the voltage between connector
    (i1) and chassis ground.
      Connector & terminal
        (i1) No. 23 (+) -- Chassis ground (-):
5   CHECK WIRING HARNESS.                           Is the voltage 10 -- 15 V?      Go to step 6.       Repair the wiring
    1) Turn the ignition switch to OFF.                                                                 harness.
    2) Install the combination meter.
    3) Turn the ignition switch to ON.
    4) Measure the voltage between connector
    (i1) and chassis ground.
      Connector & terminal
        (i1) No. 23 (+) -- Chassis ground (-):
6   CHECK BATTERY SHORT OF ABS HAR-                 Is the voltage less than 3V?    Go to step 7.       Repair the wiring
    NESS.                                                                                               harness.
    1) Turn the ignition switch to OFF.
    2) Measure the voltage between connector
    (B36) and chassis ground.
      Connector & terminal
        (B36) No. 23 (+) -- Chassis ground (-):
7   CHECK BATTERY SHORT OF ABS WARN-                Is the voltage less than 3V?    Go to step 8.       Repair the wiring
    ING LIGHT HARNESS.                                                                                  harness.
    1) Turn the ignition switch to ON.
    2) Measure the voltage between connector
    (B36) and chassis ground.
      Connector & terminal
        (B36) No. 23 (+) -- Chassis ground (-):
8   CHECK GROUND CIRCUIT OF ABSCM&H/U.              Is the resistance less than 0.5 Go to step 9.       Repair the
    1) Turn the ignition switch to OFF.                                                                 ABSCM&H/U
    2) Disconnect the connector from ABSCM&H/U.                                                         ground harness.
    3) Measure the resistance between
    ABSCM&H/U and chassis ground.
      Connector & terminal
        (B301) No. 23 -- Chassis ground:
9   CHECK WIRING HARNESS.                           Is the resistance less than 0.5 Go to step 10.      Repair the har-
    Measure the resistance between connector                                                            ness/connector.
    (B36) and chassis ground.
      Connector & terminal
        (B36) No. 23 -- Chassis ground:


                                                    ABS-31
DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)

                        Step                         Check                       Yes               No
10     CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-   Replace the       Repair the con-
       Turn the ignition switch to OFF.  nectors between combination     ABSCM&H/U.        nector.
                                         meter and ABSCM&H/U?            




                                              ABS-32
 DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
                                                                                                                                                                   ABS (DIAGNOSTICS)

B: ABS WARNING LIGHT DOES NOT GO OFF.
DIAGNOSIS:
ABS warning light circuit is open or shorted.
TROUBLE SYMPTOM:
When starting the engine and while ABS warning light is kept ON.
WIRING DIAGRAM:


                                                                                                                                            BATTERY
                                                SBF-3                                    SBF-1




                                                              SBF-4



                                                                      IGNITION
                                                                      SWITCH

                                                                                                                                                                          E
                                                                              No.14

                                                                                                                B36

                                                                                                      5         i1
                                                             No.18




                                                                                                      B9



                                                                                                                          COMBINATION
                                                                                                                          METER
                                                                                      PARKING BRAKE
            No.8




                                                                                                            WARNING


                                                                                                                          A:    i12
                                                                                                            LIGHT
                                                                                      WARNING




                                                                                                                          B:    i10                            DIAGNOSIS
                                                                                                            ABS




                                                                                                                                                               TERMINAL
                                                                                      LIGHT




                                                                                                                          C:    i11
                                                                                                                                                    B82

                                                                                                                                                        6
                                                                               A7




                                                                                                           C6




                                                                                                                                                                    B81
                        F44
                   2




                                                                                         i3                          i1
                        B61
                                                                                                           23
                                                                               31




                                                                                       B38                        B36
                                                                                                                                                   23
                   24




                                                                               21




                                                                                                           22
                                                    1




                                                                                                                               4




                                            B301    ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT                                                                    E        E




                   C:   i11
                                                                            B36                                                                             B301


         1 2 3 4 5 6 7 8 9 10                               1 2 3 4 5            6 7 8 9 10 11                                           1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
                                                            12 13 14 15 16 17 18 19 20 21 22 23 24                                        16 17 18 19 20 21 22
                                                                                                                                                               23 24 25 26
                                                                                                                                         27 28 29 30 31


                        B:    i10                                        A:    i12                                                 B82                             B38

                                                                                                                                                1 2 3 4              5 6 7 8 9
       1 2 3 4 5 6 7              8 9 10 11 12 13 14                  1 2 3       4 5 6                                        1     2          10 11 12 13 14 15 16 17 18 19 20 21
       15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30                7 8 9 10 11 12 13 14                                     3 4 5 6          22 23 24 25 26 27 28 29 30 31 32


                                                                                                                                                                                      ABS00393




                                                                              ABS-33
DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)

                        Step                                        Check                Yes                          No
1      CHECK INSTALLATION OF ABSCM&H/U                 Is the ABSCM&H/U connector Go to step 2.              Insert the
       CONNECTOR.                                      inserted into ABSCM until the                         ABSCM&H/U con-
       Turn the ignition switch to OFF.                clamp locks onto it?                                  nector into
                                                                                                             ABSCM&H/U until
                                                                                                             the clamp locks
                                                                                                             onto it.
2      CHECK GROUND TERMINAL.                          Is the resistance less than 0.5 Go to step 3.         Repair the diagno-
       Measure the resistance between ground termi-    ?                                                     sis terminal har-
       nals (B81) and chassis ground.                                                                        ness.
        Terminals
          Ground terminal (A) -- Chassis ground:
          Ground terminal (B) -- Chassis ground:
3      CHECK DIAGNOSIS LINE.                           Is the resistance less than 0.5 Go to step 4.         Repair the har-
       1) Connect the ground terminal (B81) to diag-   ?                                                     ness connector
       nosis connector (B82) No. 6.                                                                          between
       2) Disconnect the connector from ABSCM&                                                               ABSCM&H/U and
       H/U.                                                                                                  diagnosis connec-
       3) Measure the resistance between                                                                     tor.
       ABSCM&H/U connector and chassis ground.
        Connector & terminal
          (B301) No. 4 -- Chassis ground:
4      CHECK GENERATOR.                                Is the voltage 10 -- 15 V?       Go to step 5.        Repair the genera-
       1) Start the engine.                                                                                  tor. 
       and chassis ground.
        Terminal
          Generator B terminal (+) -- Chassis
          ground (-):
5      CHECK BATTERY TERMINAL.                         Is there poor contact at battery Repair or tighten    Go to step 6.
       Turn the ignition switch to OFF.                terminal?                        the battery termi-
                                                                                        nal.
6      CHECK POWER SUPPLY OF ABSCM.                    Is the voltage 10 -- 15 V?       Go to step 7.        Repair the
       1) Start the engine.                                                                                  ABSCM&H/U
       2) Idle the engine.                                                                                   power supply cir-
       3) Measure the voltage between ABSCM&H/                                                               cuit.
       U connector and chassis ground.
         Connector & terminal
           (B301) No. 1 (+) -- Chassis ground (-):
7      CHECK WIRING HARNESS.                         Does the ABS warning light         Repair the front or Go to step 8.
       1) Disconnect the connector (i1) from connec- turn on?                           body wiring har-
       tor (B36).                                                                       ness.
       2) Turn ignition switch to ON.
8      CHECK TERMINAL AT ABSCM&H/U.                  Is there damage on terminal?       Replace the       Go to step 9.
       1) Turn the ignition switch to OFF.                                              ABSCM&H/U.
       2) Check for damage at the ABSCM&H/U ter-                                        
9      CHECK ABSCM&H/U.                         Is the resistance more than 1           Go to step 10.    Replace the
       Measure the resistance between ABSCM&H/U M?                                                        ABSCM&H/U.
       terminals.                                                                                         




                                                       ABS-34
DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
                                                                                                    ABS (DIAGNOSTICS)

                    Step                                        Check                     Yes                  No
10   CHECK WIRING HARNESS.                         Is the resistance less than 0.5 Go to step 11.      Repair the har-
     Measure the resistance between connector      ?                                                   ness.
     (B36) and chassis ground.
      Connector & terminal
        (B36) No. 23 -- Chassis ground:
11   CHECK WIRING HARNESS.                         Is the resistance more than 1   Go to step 12.      Repair the har-
     1) Connect the connector to ABSCM&H/U.        M?                                                  ness.
     2) Measure the resistance between connector
     (B36) and chassis ground.
      Connector & terminal
        (B36) No. 23 -- Chassis ground:
12   CHECK POOR CONTACT IN ABSCM&H/U               Is there poor contact in        Repair the con-     Replace the
     CONNECTOR.                                    ABSCM&H/U connector?            nector.             ABSCM&H/U.
                                                                                                       




                                                   ABS-35
 DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)

C: ABS AND BRAKE WARNING LIGHT DO NOT GO OFF.
DIAGNOSIS:



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