Diagnostic
Trouble Codes
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DTC's A3 ABS 1993-1996
Volvos
To
start, the Ignition key must be in position II, engine not running.
Locate the two diagnostic sockets just inboard of the washer fill cap.
The "A" connector (shown above) has a jumper that is stored in the lid
of the "A" diagnostic connector. The jumper is used for both diagnostic
connectors. Put the jumper into A3 and push the black button
for one second. Count the red LED light as it blinks back information,
blink, blink, pause, blink, blink, blink, pause, blink, blink, is an
example of the response you would receive. 2-3-2 would be the code
retrieved, now push the button again for one second, again count the
blinks, keep checking for codes until one of them repeats, this means
you have read all the codes. Now to clear the codes, push and hold the
button for 6-7 seconds, release and as soon as the LED comes on push
and hold the button for another 6-7 seconds. Now push the button for
one second and read the codes again, you should get 1-1-1 (no faults).
You Must Read All
Codes before Clearing.
Turn the ignition off and then start the car, the check engine light
should be out. It is always a good idea to check for codes, clear them
and then drive the vehicle to see if they return, CEL or MIL, before
replacing parts.
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A3 ABS Codes

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Left/rear
ABS signal missing Right/front wheel sensor missing Rear wheel sensors
missing Left/front wheel sensor open or shorted Right/front wheel
sensor open or shorted Low pump pressureRight/rear ABS signal missing
Left/rear signal sporadic over 25mph Left/front return valve open or
shorted Left/rear wheel sensor open or shorted Right/rear wheel sensor
open or shorted Left/front signal sporadic over 25mph Left/front wheel
sensor missing Right/rear signal sporadic over 25mph Control module
fault No power to hydraulic unit valves Right/front signal sporadic
over 25mph Left/froRear wheel return valve open or shorted Traction
control valve open or shorted Pressure switch for TRACs faulty or shont
inlet valve open or shorted Right/front inlet valve open or shorted
Right/front return valve open or shorted Rear valve open or shorted
Rear wheel inlet valve open or shorted Pump motor fault
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