Test E
- Turn ignition on. Measure resistance between breakout box pins No. 9 and 10. If resistance is less than 5 ohms, go to step 7). If resistance is more than 5 ohms, go to next step.
- Disconnect 2-pin fluid level indicator connector. Measure resistance across fluid level indicator terminals with brake fluid at maximum level. If resistance is less than 2 ohms, go to next step. If resistance is more than 2 ohms, replace fluid level indicator.
- Turn ignition off. Depress brake pedal at least 20 times to depressurize brake system. Disconnect 5-pin pressure warning switch connector. Check for continuity between pressure warning switch terminals No. 3 and 5. If continuity is present, replace pressure warning switch. If continuity is not present, go to next step.
- Check for continuity between breakout box pin No. 9 and fluid level indicator pin No. 1 on harness side. If continuity is present, go to next step. If continuity is not present, repair or replace wire harness.
- Check for continuity between fluid level indicator pin No. 2 on harness side and pressure warning switch pin No. 3 on harness side. If continuity is present, go to next step. If continuity is not present, repair wire harness.
- Check for continuity between pressure warning switch pin No. 5 on harness side and breakout box pin No. 10. If continuity is present, turn ignition off. Reconnect all electrical connectors and recheck symptoms. If continuity is not present, repair wire harness.
- Check for continuity between breakout box pins No. 9 and 10 in turn to ground. If continuity is present, go to next step. If continuity is not present, reconnect all electrical connectors. Recheck symptom.
- Disconnect 2-pin and 3-pin fluid level indicator connectors. Check for continuity between terminals No. 1 and 3, 4 and 5 in turn. Check for continuity between terminals No. 2 and 3, 4 and 5 in turn. If continuity is present, replace fluid level indicator. If continuity is not present, go to next step.
- Check for continuity between fluid level indicator terminal No. 1 and ground. If continuity is present, repair wire harness. If continuity is not present, go to next step.
- Disconnect 5-pin pressure warning switch connector. Check for continuity between fluid level indicator pin No. 2 on harness side and ground. If continuity is present, repair wire harness. If continuity is not present, go to next step.
- Check for continuity between pressure warning switch terminals No. 3 and 5 in turn to ground. If continuity is present, replace pressure warning switch. If continuity is not present, go to next step.
- Check for continuity between pressure warning switch pin No. 5 on harness side and ground. If continuity is present, repair wire harness. If continuity is not present, connect all electrical connectors. Recheck symptom.