- Check Ground Circuit Turn ignition off. Disconnect TFT sensor harness connector. (Scheme 11) Using an ohmmeter, check continuity between TFT harness connector terminal No. 2 (Black wire) and ground. If no continuity exists, repair open in Black wire. If continuity exists, go to next step.
- Check Power Supply Turn ignition on. Using a voltmeter, measure voltage between TFT harness connector terminal No. 1 (Pink/Blue wire) and ground. If measured voltage is not approximately 5 volts, repair fault in Pink/Blue wire as required. If measured voltage is approximately 5 volts, go to next step.
- Check Component Leave sensor disconnected. Measure resistance between sensor connector terminals. See TANK FUEL TEMPERATURE (TFT) SENSOR RESISTANCE table. If resistance is not as specified, replace sensor. If resistance is as specified, check ECM connector for damage or corrosion. Disconnect and reconnect harness connectors in circuit and perform «FINAL CHECK»(ref-17943-S12355810372001121700000).
| Temperature °F (°C) | Ohms |
|---|---|
| 68 (20) | 2300-2700 |
| 122 (50) | 790-900 |
TANK FUEL TEMPERATURE (TFT) SENSOR RESISTANCE
