A-8 ~ Fuel Injector Coil Test

CAUTION: In order to reduce the risk of fire and personal injury, wrap a shop towel around the fuel pressure connection. 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.

Table A-8 - Fuel Injector Coil Test:

Test Description
Numbers below refer to the step numbers on the Diagnostic Table.
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°C and 35°C (50°F and 95°F), go to Fuel Injector Coil Test Procedure - Engine Coolant Temperature Less Than 10°C (50°F) or Greater Than 35°C (95°F).

Fuel Injector Tester (J 39201) And Digital Volt Meter:

Example:

3. The first second of the voltage displayed by the Digital Volt Meter (DVM) may be inaccurate due to the initial current surge, therefore, record the lowest voltage displayed by the DVM after the first second of the test. The voltage displayed by the DVM should be within the specified range (refer to the Example). The voltage displayed by the DVM may increase throughout the test as the fuel injector windings warm and the resistance of the fuel injector windings changes. An erratic voltage reading (large fluctuations in voltage that do not stabilize) indicates an intermittent connection within the fuel injector.