DIAGNOSTIC CODE INDEX
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the di
Fuel System Overview
The engine control module (ECM) enables the fuel pump relay when the ignition
switch is turned ON. The
ECM will disable the fuel pump relay within 2 seconds unless the control module
detects ignition reference
pulses. The ECM continues to enable the fuel pump relay as long as
Special Tools
CH-51450-NVH Oscilloscope Diagnostic Kit (w/NVH)
EL-38792-A Electronic Vibration Analyzer (EVA) 2
EL-38792-25 Inductive Pickup Timing Light
EL-47955 Multi Diagnostic Interface MDI
For equivalent regional tools, refer to Special Tools and Equipment.
Test Description
The numbers be