If you look under the dash you should find a black connector, taped to it should be a single wire - you might have to do a bit of searching to find it. Plug this into hole 6 of the connector then switch the ignition on. The ABS light should flash the error code, if I remember correctly the longer flashes are tens, short units. It will flash 11 first - long flash, short flash, followed by the error codes:
ABS DTC list
11 – Start Code, DTC is shown after start code, Only start code is shown in normal condition
Abnormal ABS sensor, open circuit or voltage too high
21 – front right ABS sensor
23 – front left ABS sensor
25 – rear right ABS sensor
27 – rear left ABS sensor
Abnormal ABS sensor, abnormal ABS sensor signal
22 – front right ABS sensor
24 – front left ABS sensor
26 – rear right ABS sensor
28 – rear left ABS sensor
29 – any one of four
Abnormal solenoid valve circuits in ABS control module and hydraulic unit
31 – Front right inlet valve
32 – Front right outlet valve
33 – Front left inlet valve
34 – Front left outlet valve
35 – Rear right inlet valve
36 – Rear right outlet valve
37 – Rear left inlet valve
38 – Rear left outlet valve
41 – Abnormal ABS control module
42 – Source voltage is abnormal
44 – A combination of AT control abnormal
51 – Abnormal valve relay
52 – Abnormal motor and/or motor relay
54 – Abnormal stop light switch
56 – Abnormal G sensor output voltage