Valve Relay
- Turn system test knob to "B". If system test LED illuminates, go to TEST C . If LED does not illuminate, using a DVOM, check for continuity between battery and hydraulic modulator connector pin No. 4 (Black/Brown wire). If there is no continuity, repair wire.
- If there is continuity, check underhood fuse "R" (30-amp). Check for continuity between hydraulic modulator connector pin No. 6 and ECU harness connector pin No. 27 (Blue/Green wire).
- If continuity is not present, repair wiring. If continuity is present, check Yellow/Red wire between hydraulic modulator connector pin No. 10 and instrument panel "ABS" warning light. If continuity is not present, repair wiring.
- If continuity is present, check for continuity of Yellow/Red wire between "ABS" warning light and ECU harness connector. If continuity is not present, repair wiring harness.
- If continuity is present, check for continuity between hydraulic modulator harness connector pin No. 12 and ECU harness connector pin No. 32 (Yellow/Green wire). If continuity is not present, repair wiring harness. If continuity is present, check for continuity between hydraulic modulator harness connector pin No. 8 and ground (Black wire).
- If continuity is not present, repair wiring harness. If continuity is present, check circuits between valve relay harness connector and hydraulic modulator connector. See VALVE RELAY CONTINUITY POINTS table. Check between valve relay connector pin No. 86 and motor relay connector pin No. 86. See Figure . If any circuit does not have continuity, replace modulator.
VALVE RELAY CONTINUITY POINTS
| Valve Relay Pin No. | Modulator Pin No |
|---|---|
| 30 | 12 |
| 85 | 6 |
| 87 | 4 |
| 87a | 8 |
| 86 | 86 |