DTC 36, Injection Pulse Width Error (Response Time Long): Notes

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1995 GMC Yukon, 1995 GMC Suburban, 1995 GMC Pickup, 1995 GMC Cab & Chassis, and 1995 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fuel injector driver receives an inject command signal from PCM and provides a current regulated output to fuel solenoid that controls injection. It also returns an injection pulse width signal back to PCM to inform it when the fuel solenoid has actually seated. This injection pulse width signal is measured in micro seconds. DTC 36 will set when:

Battery voltage is greater than 10 volts.
Engine coolant temperature is greater than 68°F (20°C).
Injection pulse width is greater than 2.5 milliseconds.

PCM will default to a fixed injection pulse width value of 1.95.

NOTE: Test numbers refer to numbers on diagnostic chart.

This step determines if DTC 36 is result of a hard failure or an intermittent condition.
This step determines if solenoid is at fault, or if problem is with PCM or wiring.