Deceleration Fuel-Cut System Test
- Connect a tachometer to engine (to monitor needle fluctuations). See appropriate ADJUSTMENTS article for tachometer attaching points. Start engine and warm to operating temperature. Ensure A/C and other accessories are off.
- Unplug throttle position sensor connector from throttle position sensor. Short terminals IDL and E1 (or E2) on wire side of connector. See Fig 1.
- Gradually raise engine RPM. Fuel-cut operation can be checked by noting the fluctuation of tachometer needle. Fluctuation indicates fuel-cut system is being turned on and off. Check that fuel-cut points and fuel return points are within specifications. See DECELERATION FUEL-CUT & FUEL RETURN RPM table.
DECELERATION FUEL-CUT & FUEL RETURN RPM
| Model | Fuel-Cut Engine RPM | Fuel Return Engine RPM | |
|---|---|---|---|
| Camry | |||
| 2VZ-E V6 | 1800 | 1200 | |
| 3S-FE 4-Cyl | 1700 | 1300 | |