SERVICE BRAKES
Anti-lock Braking System Troubleshooting
Connector terminal arrangement for
troubleshooting
3
Terminal arrangement shown on the
special tool connector
TSB Revision
Caution
1. When carrying out inspection of the ABS-ECU ter-
minal voltage and resistance, the special tool
should be used.
2. Because the ABS-ECU connector terminal arrange-
ment for troubleshooting is different from the termi-
nal arrangement shown on the special tool connec-
tor, when using the special tool for inspecting, take
the readings from the terminal numbers of the spe-
cial tool.
Example
ABS-ECU
connector terminal
Terminal number shown on
number for troubleshooting
the special tool connector
18
1
CHECK, USING ON-BOARD DIAGNOSTIC
(1) With the ignition switch OFF, connect the adapter harness
and scan tool, turn the ignition ON and select the ABS sys-
tem. (The ABS warning light lights up, it goes into the scan
tool mode.
In the scan tool mode, ABS does not func-
tion.)
If it does not go into the scan tool mode, check the ECU
power
circuit
and the harness between the ECU and data
link connectors.
(2) Read the on-board diagnostic output codes from the ECU
memory.
(3) Cancel the diagnostic trouble codes once from memory.
(Refer to
If the memory can not be canceled, the ECU is currently
detecting the trouble.
can be cleared, the trouble is
either temporary or appears only when driving.
(4) When the diagnostic trouble codes are cleared, or when
the ABS system goes into fail safe during another test drive
and diagnostic trouble codes are outputed, check accord-
ing to diagnostic trouble code check charts (E-l
Summary of Contents for 1989 Galant
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