ECT Between 10-35 Degrees C (50-95 Degrees F)

Diagnostic Chart:

Schematic:

Example:

TEST DESCRIPTION

CAUTION: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gauge. Place the towel in an approved container when the connection of the fuel pressure gauge is complete.

2. The engine coolant temperature affects the ability of the fuel injector tester to detect a faulty fuel injector. If the engine coolant temperature is NOT between 10-35°C (50-95°F), go to Fuel Inj Coil Test - ECT Outside 10-35 Degrees C (50-95 Degrees F). Component Tests and General Diagnostics
3. The initial voltage that is displayed by the DMM may be inaccurate because of the initial current surge. Therefore, record the lowest voltage that the DMM displays after the test has run for one second. The voltage that is displayed by the DMM should be within the specified range.

Refer to the example. The voltage that is displayed by the DMM may increase throughout the test. The increase may occur when the fuel injector windings warm, and the resistance of the fuel injector windings changes. An erratic voltage reading indicates an intermittent connection within the fuel injector.