Ohms Measurements

For ECM connector view and legend refer to "Engine Control Module : Diagrams : Connector Views. Connector Views

CAUTION: When measuring ohms disconnect the ECU from the harness plug and never turn the ignition key on. It is possible that failure to follow these steps will result in damage to the ECU.

Grounds:

Coolant Temperature Sensor:

Throttle Switch:

** If throttle is opened reading should go to infinity.

Electro-hydraulic Actuator:

Air Flow Sensor:

*** Disconnect Altitude sensor before making any reading on the Air Flow sensor as the Altitude sensor will affect the readings.

1. Flap on air flow sensor closed or air flow sensor plate at rest position. Resistance increases as flap or plate opens.

2. Flap on air flow sensor opened to maximum or air flow plate deflected to maximum.