Mitsubishi 3000GT Service Manual page 865

SERVICE BRAKES - Anti-lock Braking System Troubleshooting
When using the MUT
harness
DIAGNOSTIC TROUBLE CODE CHART
CHECK USING ON-BOARD DIAGNOSTIC
When using the scan tool [Multi-use tester (MUT)
(1) With the ignition switch OFF, connect the scan tool.
When connecting the scan tool (MUT-II) to a 1993 model
vehicle, use the adapter harness supplied together.
Caution
Turn off the ignition switch beforehand whenever the
scan tool is connected or disconnected.
Turn the ignition ON and select the ABS system. (The
ABS warning light lights up, it goes into the scan tool
mode. In the scan tool mode, ABS does not function.)
If it does not go into the scan tool mode, check the ECU
power circuit and the harness between the ECU and
diagnostic output terminals.
(2) Read the on-board diagnostic output codes from the ECU
memory.
(3) Clear the diagnostic trouble codes once from memory.
(Refer to P.3512.)
If the memory cannot be cleared, the ECU is currently
detecting the trouble and the ABS ECU is in fail safe.
If it can be cleared, the trouble is either temporary or
appears only when driving.
(4) When the diagnostic trouble codes cannot be cleared,
or when the ABS ECU goes into fail safe during another
test drive and diagnostic trouble codes are output, check
accordinn to diaanostic trouble code check charts
(E-l -E-i).
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