Fuel-Cut Rpm

Connect a tachometer to engine (to monitor needle fluctuations). Start engine and warm to operating temperature. Disconnect 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. See Fig 2. Check that fuel-cut points and fuel return points are within specifications. See FUEL-CUT & FUEL RETURN RPM table.

Fig 1: Terminal Connectors For Testing Fuel-Cut RPM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Needle Fluctuations When Testing Fuel-Cut RPM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

FUEL-CUT & FUEL RETURN RPM

Model Type

Fuel-Cut Engine RPM

Fuel Return Engine RPM

Pickup (Turbo)

1800

1600

Pickup (Non-Turbo) & 4Runner 4-Cyl. & V6

⁽¹⁾ 1300

⁽¹⁾1000

⁽¹⁾	Apply service brakes when testing 4-cylinder 2WD (M/T) models. On 4-cylinder 4WD (A/T) models, use 1900 RPM for fuel-cut and 1600 RPM for fuel return without service brakes applied.