Basic Process For Troubleshooting

ABS (ANTI-LOCK BRAKE SYSTEM)

EAS27810

BASIC PROCESS FOR TROUBLESHOOTING

                   Does not come on.          [A]                             Comes on for 2 seconds, then goes off.
                                              Check the ABS warning
                                              light.
                                                   Flashing.             Remains on.

  [B-1]                            [B-3]                       [B-2]                        [B-5]                  [B-4]
  The ABS warning light            The ABS warning             The ABS warning              Present                Past
  does not come on.                light flashes.              light remains on.            malfunction            malfunction
                                                                                         NO               YES     YES             NO

                                                                                         NOTE: Display the
                                                                                         malfunction code
                                                                                         number and record it.

 [C-1]                         [C-3]                             [C-2]
 Only the ABS warn-            The ABS warning light             All indicator
 ing light does not            does not come on when             lights do not
 come on.                      pushing the start switch.         come on.

                                          [C-4]                      [C-6]                  [C-7]                 [C-5]
    Check the                             The ABS warning            The ABS warning        Diagnose by the       The ABS warning
    fuse.                                 light flashes.             light remains on.      malfunction           light flashes every
                                                                                            code.                 0.5 second.

           Check the
           test coupler                                           Check the                          Check the
           adapter.                                               battery.                           meter assembly.

                           Check the           Check the                      For details, use the mal-
                           wire harness,       brake switch                   function codes listed                     Normal
                           connectors,         circuits.                      from [C-6].
                           and couplers.

                                                                                   Check the
                                    Check the                                      wire harness.
                                    main switch.

                                                           Sensors         ABS motor relay       Hydraulic unit     ABS ECU

                                                                                                   Not
                                                                                 Check the         OK     Hydraulic unit
                                                                                 hose routing.            operation tests
                                                                                                                  OK
                                               Have all problems been corrected?
                                 NO                                   OK

                          Return to [A]                [D-1] Delete the mal-       Delete
                                                                                               Finished
                                                       function code record.
                                          Cannot delete                       OK

                                                     [D-2] Delete function test

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