Powertrain Controls - ECM/PCM

Injection Pulse Width Error (Response Time Long):

CIRCUIT DESCRIPTION
The fuel injection driver receives an inject command signal from the Powertrain Control Module (PCM) and provides a current regulated output to the fuel solenoid that controls injection. It also returns an injection pulse width signal back to the PCM to inform it when the fuel solenoid has actually seated. This injection pulse width signal is measured in micro seconds.

DIAGNOSTIC TROUBLE CODE (DTC) 36 WILL SET WHEN
^ Battery voltage greater than 10 volts.
^ Coolant temperature greater than 20°C (68°F).
^ Injection pulse width greater than 2.5 milliseconds.

ACTION TAKEN (PCM will default to)
Fixed injection pulse width value of 1.95 milliseconds.

DTC 36 WILL CLEAR WHEN
The fault condition(s) no longer exist, and the ignition switch is cycled "OFF" then "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This step determines if DTC 36 is a hard failure or an intermittent.
2. This step sill determine if the solenoid is at fault, or if there is a problem with the PCM or wiring.

DIAGNOSTIC AIDS
The injection pulse width will fluctuate when throttle is depressed.
A weak (mechanical failure) fuel solenoid will result in DTC 36.