MX-5 Miata L4-1597cc 1.6L DOHC (1992)
ABS Control Unit: Testing and Inspection
Fig. 33 ABS Diode Test
1.
Check meter fuse and bulb, then the wiring harness to control unit or hydraulic unit.
2.
Disconnect hydraulic unit 12 pin connector.
3.
Using ohmmeter, check for continuity of terminals shown in Fig. 33.
4.
Continuity should exist with positive lead attached to G terminal. Continuity should not exist with positive lead attached to D terminal.
5.
If continuity is not as specified, replace hydraulic unit.