- Check air intake system. Ensure air cleaner is not obstructed. Check air meter-to-throttle body seal, air cleaner-to-air meter seal, and engine breather-to-inlet duct. Repair as necessary and retest system. If air intake system is okay, go to next step.
- Turn ignition off. Disconnect Mass Airflow (MAF) sensor harness connector. Measure resistance between MAF sensor terminals No. 3 (Blue/Purple wire) and No. 4 (Black/Green wire), with MAF sensor at specified temperature. (Схема №4) See «IAT & ECT SENSOR RESISTANCE»(ref-2818-S38004469892000041300000) table. If resistance is as specified, go to next step. If resistance is not as specified, replace MAF sensor and retest system.
- Disconnect ECM harness connector EM12. Check continuity of Blue/Purple wire between ECM harness connector EM12 terminal No. 12 and MAF sensor harness connector terminal No. 3. (Схема №3) If continuity exists, go to next step. If continuity does not exist, repair open in Blue/Purple wire and retest system.
- Disconnect ECM harness connectors EM10 and EM11, pedal position and mechanical guard sensor harness connector, and throttle position sensor harness connector. Check continuity of Black/Green wire between ECM harness connector EM10 terminal No. 20 and MAF sensor harness connector terminal No. 4. (Схема №3) If continuity exists, system is okay. If continuity does not exist, repair open in Black/Green wire and retest system.
| Temperature °F (°C) | Ohms |
|---|---|
| 4 (-20) | 15,000 |
| 32 (0) | 5740 |
| 68 (20) | 2450 |
| 104 (40) | 1150 |
| 140 (60) | 584 |
| 176 (80) | 320 |
| 212 (100) | 184 |
IAT & ECT SENSOR RESISTANCE