Test B - Valve Relay
- Turn system test knob to "B". If system test LED comes on, go to TEST C. If not, using an ohmmeter, check for continuity between battery and hydraulic modulator connector (Black/Brown wire). If there is no continuity, repair wire.
- If there is continuity, check 30 amp fuse. If fuse is okay, check continuity between hydraulic modulator connector and ECU (Blue/Green wire). If there is no continuity, repair wire.
- If there is continuity, check between hydraulic modulator connector and warning light (Yellow/Red wire), and warning light to ECU (Yellow/Red wire). If there is no continuity, repair wire. If there is continuity, check between hydraulic modulator connector and ECU (Yellow/Green wire).
- If there is no continuity, repair wire. If there is continuity, check between hydraulic modulator and ground (Black wire). If there is no continuity, repair wire. If there is continuity, check circuits between valve relay and hydraulic modulator. See VALVE RELAY CONTINUITY POINTS
table. See Figure
. Check between valve relay pin No. 86 and motor relay pin No. 86.VALVE RELAY CONTINUITY POINTS (1)
Valve Relay Pin No. Modulator Pin No 30 12 85 6 87 4 87a 8 (1) Refer to Fig. Figure . - If any wire does not have continuity, replace modulator.